P

P
The phenolphthalein alkalinity of the filtrate, reported as the number of milliliters of 0.02 Normal (N/50) acid required per milliliter of filtrate to reach the phenolphthalein end point.

P & A
SEE: Plugged and Abandoned.

P Wave
An elastic body wave in which particle motion is in the direction of propagation.

Pack Ice
Any sea ice other than fast ice.

Pack Off
To place a packer in the wellbore and activate it such that it forms a seal between the tubing and casing.

Packer
A device, usually employing rubber, used to produce a seal between tubing, casing, or drill pipe and the borehole wall or casing.

Packer Depth
The measured depth at which the packer was set.

Packer Flowmeter
A spinner type velocimeter which utilizes an inflatable packer bag to divert the fluid flow through the spinner assembly.

Packer Fluid Type
Any fluid placed in the annulus between the tubing and casing above a packer. Along with other functions, the hydrostatic pressure of the packer fluid is utilized to reduce the pressure differentials between the formation and the inside of the casing and across the packer itself.

Packer Test
Application of hydraulic pressure either through the tubing or annulus to assure that the packer is properly set and sealed.

Packer Type Code
An indicator of the name and model of the packer used in the operation.

Packing
Material used in the stuffing box of a valve or between flange joints to maintain a leakproof seal.

Packing Gland
The metal part that compresses and holds the packing in place in a stuffing box.

Packing ( Process)
Any material, arranged to present considerable surface area and voids, for use in place of bubble trays. Expanded metal bundles or small rings, spirals or saddles made of ceramic, carbon or metal are usually used.

Page Count
The total number of pages contained in the report.

Page Number
The alpha/numeric field used for identification purposes.

Paid Up Lease Flag
An indicator of whether or not a delayed rental on a lease has been paid.

Paleontological Sample Taken Flag
An indicator of whether a paleontological sample was taken.

Paleontology
The branch of geology dealing with the study of life in past geologic time, based on fossil plants and animals and including phylogeny, their relationships to existing plants, animals and environments, and the chronology of Earth's history.

Paleontology Marker Age
The age in millions of years of the paleontology marker.

Panel
SEE: Stiffened Panel.

Panel Stress
Stress on stiffened panels resulting from local applied pressures or transverse loads.

Paraffin
A hydrocarbon having the formula CnH2n+2; e.g., Methane, ethane. Heavier paraffin hydrocarbons form a waxlike substance; i.e., hydrocarbons C18H38 and heavier. These heavier paraffins often accumulate on the walls of tubing amd other production equipment restricting or stopping the flow of oil.

Paraffin Base Crude Oil
A crude oil that will yield large quantities of paraffin in the process of distillation.

Paraffin Inhibitor
A chemical that, when injected into the production string prevents or minimizes paraffin deposition.

Paraffin Scraper
Any tool used to remove paraffin from inside tubular goods.

Paraffin Treatment
The injecting of a chemical into the production string which removes paraffin deposition.

Parallel Flow
SEE: Laminar Flow.

Parish Name
Political subdivision of the state of Louisiana; such subdiviisons in other states are called counties.

Parish Name Abbreviation
An abbreviation of the parish name.

Part
An individual piece used in the assembly of single equipment units; e.g., body, bonnet, gate, are parts of a valve. Also may be a piece in raw material form.

Participating Area Name
The name given to the part of a unit area to which production is allocated in the manner described as in a unit agreement.

Participating Royalty
A royalty interest, independent of any existing lease, which shares in some lease benefits other than gross production, such as bonus, rental, or the right to join in the execution of leases. The term is ambiguous since it does not indicate in each particular case which other lease benefit is joined to the royalty interest.

Particle
A minute unit of matter, usually a single crystal, or of regular shape with a specific gravity approximating that of a single crystal.

Particle Size Distribution
The fraction or percentage of particles of various sizes or ranges of sizes as measured through a sieve.

Particulate
A finely divided solid or liquid particle in the air or in an emission. Particulates include dust, smoke, fumes, mist, spray, and fog.

Partner Allocation Interest Percentage
The percentage that is used to allocate costs that appear on the outside operator's joint interest billings to the leases and/or units that the facilities serve. It is the percentage that is used for the other partner's interest in the lease.

Partner Rental Percentage
The percentage of the total rental which is borne by the partner in the lease.

Party
SEE: Seismic Crew.

Pass
One of several similar repetitive operations; i.e., in pipe welding, a pass is one welding circuit of the pipe; in a tubular exchanger, a pass is the flow of fluid from one end to the other, either in the tubes or the shell.

Pass Through Royalty
A royalty paid on production from a well drilled upon or through one tract, and bottomed under another tract.

Pawl
A device for positively holding a member against motion in one or more directions.

Pay Code
Indicates how often a lease number can receive a mineral check. Examples are: Paid when interests are accumulated to a specific amount or more; Paid currently regardless of amount accrued; Paid quarterly; Paid annually; Semi-annual payment.

Pay Formation
The formal or informal stratigraphic zone that contains producible oil and/or gas in commercial quantities.

Pay Rent Required Flag
An indicator of whether or not a provision requiring payment of rent regardless of production or expiration of term.

Pay Sand
SEE: Pay Zone.

Pay Zone
The reservoir rock interval that will yield commercial quantities of hydrocarbons.

Pay Zone Name
The name which identifies the pay zone.

Pay Zone Thickness
The stratigraphic thickness of reservoir rock that will yield commercial quantities of hydrocarbon.

Payee Name
The name of the organization where the payment should be remitted.

Payload
SEE: Load Working.

Payment Date
The date of receipt of original payment.

Payment Identifier
A unique number to identify the payment associated with the report.

Payment Information Remark
Additional textual information for remitting payment.

Payment Method Code
An indicator of the method used to remit payment; e.g. check; wire transfer; direct pay; etc.

Payment Recovery Flag
An indicator that overpayment or advanced rental recovery is being made from an owner.

Payment Recovery Percentage
The percentage of an owner's interest that goes toward recovering an advance rental or overpayment.

Payor Identifier
The payor of royalties due.

Payout
That point when the revenue received, net of taxes and royalties, equals the capital and operating costs expended plus penalty, if applicable for the project or operation.

Payout Statement
A statement which details status of payout based on revenue less expenditures and penalties if applicable, as required by the agreement. Generally, these statements contain current period and inception to date data.

Pe
Abbreviation for: Polyethylene, petroleum engineer.

Pearlitic
Alternate parallel platelets of iron and a microstructural arrangement having iron carbide in one grain. May also refer to a steel with a preponderance of such carbine arrangements.

Pebble
A clastic sedimentary particle with a diameter between 4 and 64 millimeters, based on the Wentworth Scale of Measurement.

Pedestal
The supporting substructure upon which a revolving upper structure is mounted.

Peening
SEE: Abrasion.

Penalty Amount
The amount of penalty or penalties from an agency ordered assessment.

Penalty Clause
A legal instrument (such as a unit agreement) providing for the assessment of a penalty under certain stated circumstances.

Penalty Description Remark
A description of the penalty or penalties resulting from agency ordered adjustment of well allowable.

Penalty Provisions Flag
An indicator of whether or not the operating agreement allows a provision to the nonoperator to elect to not participate in the work that is being requested by the operator. The nonoperator can notify the operator that they elect to be carried under the nonconsent provisions of the contract. The operator and all consenting parties will carry the nonconsenting parties interest. The penalty provision provides that the consenting parties will recover in addition to the actual costs incurred, an additional

Pendant
A nonoperating standing rope of specified length with fixed end connections. Also referred to as: Guy Rope.

Pendulum Effect
Refers to the pull of gravity on a body; i.e., as a pendulum to return to a vertical position.

Pendulum Force
The force of gravity on a body as on a pendulum.

Penetrameter
SEE: Magnetic Field Indicator.

Penetration
The maximum depth in a material from which indications can be measured.

Penetration Rate
SEE: Drill Bit Penetration Rate.

Penetrator
A localized spot of incomplete fusion.

Peptization
An increased dispersion due to the addition of electrolytes or other chemical substances.

Peptized Clay
A clay to which an agent has been added to increase its initial yield; e.g., soda ash is frequently added to calcium montmorillonite clay.

Percentage Depletion
In federal income taxation, the method of figuring the depletion allowance on the basis of an arbitary percentage of gross income from production.

Percentage Of Proceeds Contract
SEE: Casinghead Gas Purchase Contract.

Percolation
Downward infiltration of water through the pores or spaces of a rock or soil.

Perfect Thread Length
A design length from the end of pipe or coupling to a specified location. For buttress thread this is an L7. Some threads may have unfinished crests.

Perforated Cylinder Centrifuge
A mechanical centrifugal separator in which the rotating element is a perforated cylinder (the rotor) inside of and concentric with an outer stationary cylindrical case.

Perforated Effective Permeability
The perforated effective permeability of a Berea sandstone core target is the effective permeability to kerosine of the core target after it has been perforated at the outflow end by a bullet or shaped charge, base on the original cross section and length of the core target. Normally abbreviated as: kp.

Perforated Pad Stabilizer
Stabilizer with a built on perforated pad to extend the outer diameter. Also referred to as: Perforated Sleeve Stabilizer.

Perforated Rotor
The rotating inner cylinder of the perforated cylinder centrifuge.

Perforation
An interval of uncased wellbore or casing pierced with holes after it has been set in the wellbore, to allow flow of the reservoir fluids.

Perforation Abandonment Date
Date the specified perforated interval was squeezed or abandoned by any means.

Perforation Balance Pressure Measurement
The differential between the hydrostatic pressure in the casing and the reservoir pressure when the perforations are made. Positive number indicates overbalance; negative number indicates underbalance.

Perforation Charge Size
The size of the charge per shot used during the perforation operation.

Perforation Cleaning Type
Type of perforation cleaning operation carried out before the gravel packing operation; e.g., acidization; surge; wash.

Perforation Date
The date a perforation activity was performed on the well.

Perforation Diameter
The size (diameter) of the perforations.

Perforation Fluid Type
The type of fluid within the casing during the perforation activity.

Perforation Gun Outside Diameter
The outside diameter of the perforating gun.

Perforation Gun Type
The type of perforating gun used to shoot the given interval.

Perforation Interval Count
The number (count) of separate intervals perforated or open to production within the perforation interval top and base depths.

Perforation Interval Measured Base Depth
The measured depth to the deepest perforation in the perforated interval.

Perforation Interval Measured Top Depth
The measured depth to the shallowest perforation in the perforated interval.

Perforation Interval Status
Identifies the state or conditions of perforations within a perforated interval; e.g., open; clogged; squeezed.

Perforation Interval True Vertical Base Depth
The true vertical depth to the deepest perforation in the perforated interval.

Perforation Interval True Vertical Top Depth
The true vertical depth to the shallowest perforation in the perforated interval.

Perforation Net Open
The net perforated distance open to production.

Perforation Phasing
Radial phasing of perforations within the perforation interval. Expressed as angular units between holes.

Perforation Set
A group of perforations within a wellbore having common phase, spacing, hole diameter, etc., probably from a common genesis.

Perforation Shot Density
The perforation density; i.e., shots per unit length.

Perforation Surge Volume
The volume of fluid flowed from the well completion after the perforation activity.

Perforation Type
The method used to perforate the casing. Examples are: bullet, jet, combination.

Perforations Midpoint True Vertical Depth
The true vertical depth at the midpoint of the completion perforations.

Perform Work.

Period Activity
An activity that takes place over a period of time and has both a start and end datetime.

Period Activity End Date
The end datetime of the period activity.

Period Activity Start Date
The start datetime of the period activity.

Permafrost
Soil with partially or completely frozen pore water. Sometimes defined as soil at a temperature below O C. Used only to indicate ice bonded soil.

Permafrost Depth
The measured depth to the top of permafrost.

Permanent Magnet
A magnet or body which retains a strong residual magnetic field.

Permeability
A property of rock denoting its ability to pass fluids and commonly used by the oil industry to distinguish between rocks which will give up no fluids and those which will produce oil, gas and water.

Permeability ( 90 Degree)
Absolute permeability measured horizontally on a conventional core sample in the direction perpendicular to the direction for maximum permeability.

Permeability Method
The method of analysis used to determine the permeability of the sample.

Permit
The written permission providing specific rights to perform those activities within stated conditions and restrictions as specified therein. Normally granted by the agency having jurisdiction. In the absence of a jurisdictional agency, the instrument may be executed by the operators involved or, as in the case of a geophysical exploration permit, by the owner(s). Examples include: commingling permit, drilling permit, exploratory permit, geophysical exploration permit; well permit.

Permit Number
The number assigned to a permit approval by the regulatory agency to

Permit Report Type Code
An indication of the type of permit or report being submitted.

Perpendicular
SEE: Orthogonal.

Personal Expense
Travel and other reasonable reimbursable expenses.

Petrography
The branch of geology dealing with the description and systematic classification of rocks, especially igneous and metamorphic rocks, and especially by means of microscopic examiniation of thin sections.

Petroleum
Oil or gas obtained from the rocks of the earth by drilling down into a reservoir rock and piping them to the surface.

Petroleum Excise Tax Due Amount
The amount of Petroleum Excise Tax due.

Petroleum Industry Data Exchange
The American Petroleum Institute's (API) subcommittee which is an electronic data interchange (EDI) action group for the oil and gas industry.

Petroleum Product Exchange System
An EDI system that provides for the collection of bill of lading and bulk custody information on finished product exchange transactions. Commonly abbreviated as: PETROEX.

Petrology
The branch of geology dealing with the origin, occurence, structure and history of rocks.

Petrophysics
The study of physical properties of reservoir rocks, especially porosity and permeability.

Ph
The negative logarithm of the hydrogen ion concentration. The lower the pH (more acidic), the higher the concentration of hydrogen ions. The higher the pH (more basic), the lower the concentration of hydrogen ions.

Phantom Thread
SEE: False Starting Thread.

Phase
In Vibroseis acquisition: the lead (positive) or lag (negative) of the emitted signal relative to the pilot signal. In wave propagation: the phase is the argument (kx-ft) of the wave function V(kx-ft), where the velocity of the travelling wave is c=f/k.

Phenols
A group of aromatic organic compounds containing one or more hydroxyl functions similar in structure to phenol (C6H5OH). Such compounds may produce a taste and odor problem in water at very low concentrations. In higher concentrations, they are toxic to aquatic life.

Phosphate
Certain complex phosphates, usually sodium tetraphosphate (Na6P4Ol3) and sodium acid pyrophosphate (SAPP, Na2H2P2O7), are used either as drilling fluid thinners or for treatment of various forms of calcium and magnesium contamination.

Photoclinometer
A well logging device which photographically records the wellbore path azimuth and deviation from the vertical.

Physics
The science dealing with matter and energy, particularly if changes are not chemical or physiological.

Pi
SEE: Productivity Index; Profitability Index.

Pickling
The act of preserving a wellbore by isolating the open horizons within a well with either packers or cast iron bridge plugs and filling the casing with packer fluid.

Pidx
SEE: Petroleum Industry Data Exchange.

Piezoelectric Effect
The characteristic of certain materials to generate electrical charges when subjected to mechanical vibrations, and conversely to generate mechanical vibrations when subjected to electrical pulses.

Pig
A scraping tool forced through a flow line or pipeline to clean out wax or other deposits. Also referred to as rabbit or crawler.

Pile
A cylindrical tubular member, usually driven through the leg of an offshore platform, that carries vertical loads and resists lateral forces.

Pile Supported Structure
A structure deriving its support from piles inserted into the seabed.

Piling
A heavy beam driven into the earth as a support for a structure.

Pilot Hole
A borehole of small diameter that is drilled ahead of the main borehole. Sometimes ambiguously referred to as a rat hole.

Pilot Testing
A method of predicting behavior of drilling fluid systems by mixing small quantities of drilling fluid and additives, then testing the results.

Pin End
The threaded end of a pipe without a coupling applied.

Pinhole
A short unwelded area in the weld line extending through the entire pipe thickness so that fluid will leak out through the area very slowly.

Pipe
SEE: Tubular Goods.

Pipe Coefficient
A factor used in the Hazen-Williams flow formula to correct for roughness of the inside surface of the pipe.

Pipe Connection Type
The type of pipe or fitting used to join a pipe with another pipe or tank. For purposes of gas testing, connection types are either flange taps or pipe taps.

Pipe Cost
Cost includes all pipe, sized 2 inches and over, except pipe installed in or on injection wells, storage wells, or salt water wells.

Pipe Finder
A device to detect pipe underground.

Pipe Lean
The angle between the vertical and a typical stand of pipe with the setback.

Pipe Locator
SEE: Pipe Finder.

Pipe Racking Board Guyline
A line which runs from racking board to ground anchors or special substructure or base which provide a substitute for ground anchors. Also referred to as: Tubing Board Guyline.

Pipe Ram
The closing and sealing component on a blowout preventer whose end is contoured to seal around pipe to close the annular space. Unless special rams accommodating various pipe sizes are used, separate rams are necessary for each size (outside diameter) pipe in use.

Pipe Still
A refinery installation, in which crude oil is vaporized while passing through a series of pipes.

Pipe Tap
Tap hole in which the upstream tap is located 2 1/2 times the inside diameter of the pipe from the upstream face of the orifice plate; the center of the downstream tap is placed 8 times the pipe inside diameter from the downstream face of the plate.

Pipe Tapping
The act of drilling a hole through the wall of pipe which is under pressure. A special saddle is used to attach a valve and lubricator to the pipe. The saddle and valve remain on the pipe after the tapping operation is completed.

Pipe Wind Up Angle
The twist in the drillstem due to reactive torque. Also referred to as: Angle of Twist.

Pipeline
The piping, risers and appurtenances installed for the purpose of transporting gas, oil, sulphur, water, etc.

Pipeline Abandon Flag
An indicator of whether a plipeline has been abandoned.

Pipeline Abandonment Approved Date
The day, month and year that the abandonment of the pipeline was approved by the regulatory agency office.

Pipeline Abandonment Date
The day, month and year the abandonment of the pipeline was completed by the operator.

Pipeline Authority Code
An indicator of the authority under which the pipeline operates.

Pipeline Bidirectional Flag
An indicator of whether the product in the pipeline can be passed in either direction.

Pipeline Boot
Installed on road casing to seal the casing to the pipeline.

Pipeline Capacity
The maximum quantity of gas that can be moved through a pipeline system at any given time based on existing service conditions such as available horsepower, pipeline diameter(s), maintenance schedules, regional demand for natural gas, etc.

Pipeline Connection
The point at which a product is transferred to a pipeline.

Pipeline Construction Date
The day, month and year the pipeline was built.

Pipeline Day
The 24-hour period designated by each pipeline company for the operation of its pipeline system.

Pipeline Gas
Gas which meets gas pipeline purchaser specifications.

Pipeline Interconnection
A point at which facilities of two pipelines interconnect.

Pipeline Oil
Oil of sufficient purity to meet the specifications of the purchaser and to be run into a pipeline.

Pipeline Origination Area Code
The designated abbreviation for the origination of a pipeline segment as assigned to Outer Continental Shelf (OCS) geographical units for identification purposes and for use on maps and in data bases.

Pipeline Pipe Wall Thickness Value
The wall thickness of the pipeline pipe.

Pipeline Pipe Weight Value
The weight per foot of the pipeline pipe installed.

Pipeline Status Code
An indicator of the current status of the pipeline.

Pipeline Storage
Volume of gas within the pipeline for which title has not yet passed to the purchaser.

Pipeline Type Code
An indicator of whether the pipeline is departing, incoming or bidirectional.

Pit
(1) An emergency tank or shallow pond to hold water, etc., prior to disposal.(2) A depression resulting from the removal of foreign material rolled into the surface during manufacture. (3) A depression or cavity that may be caused by corrosion or removal of roll in or extraneous material.

Pit Liner
Material used to line a pit to prevent leakage.

Pit Liner Type Code
An indicator of the type of pit liner.

Pit Volume Flag
An indicator of whether a device is installed in the drilling fluid tank to indicate the fluid level in the tank.

Pit Volume Totalizer
A device that combines all of the individual pit volume indicators and registers the total drilling fluid volume in the various tanks.

Pitch
(1) The rotation of an object about a horizontal axis perpendicular to the foreward/aft direction of the object. For drilling platforms, this horizontal axis is east-west. For a ship, movement should be bow/stern.(2) The distance from a point on a thread to a corresponding point on the next thread, measured parallel to the axis.

Pitch Cone
An imaginary cone which passes through the thread profile at approximately the thread center.

Pitch Diameter
(1) The diameter of the pitch cone or the distance between the pitch line of the thread.(2) Root diameter of drum, lagging or sheave, plus the diameter of the rope.

Pitch Line
An imaginary line drawn approximately through the center of the thread making the widths of the thread tooth and gap equal at the pitch line.

Pitman
The arm that connects the crank to the walking beam on a pumping unit.

Pitot Tube
A measuring device for determining the gas flow rates during tests. The impact pressure of the gas flow at the end of the tube compared to the static pressure in the stream is used in determining the flow rate.

Pitted Thread
A depression or cavity on a chamfer or thread surface caused by inclusions or porosity exposed after machining or by corrosive attack during storage of the pipe.

Plain End
Pipe end without threads or tool joint.

Plane Of Closure
Vertical plane that contains both the surface location of the wellbore and the last station of the survey.

Plane Table
A small board mounted on a tripod by means of a swivel or ball and socket joint and used for mapping surface geologic structures and features.

Plant
A locale or installation consisting of tanks, atmospheric vessels, pressure vessels, pumps, etc. required for treating, storing, or processing an oil or gas stream.

Plant Name
The name used to identify the plant or facility.

Plant Shrinkage
The amount of gas volume loss due to plant extraction of liquids during processing.

Plant Thermal Reduction
The British Thermal Unit (BTU) equivalent of the liquid products extracted from the producer's gas plus the portion of plant fuel necessary to extract those liquids, plant flare and other plant losses. When expressed as volume, this is known as Plant Volume Reduction or PVR.

Plant Volume Reduction
The gas volume or British thermal unit (BTU) equivalent of the liquid products extracted from the producer's gas plus the portion of plant fuel necessary to extract those liquids, plant flare and other plant losses.

Plastic
One of a large group of organic, synthetic or processed materials used for coating; or that are molded, cast, or extruded and used for making structural items. (1) Acetate Butyrate: produced by reacting cellulose with acetic and butyric anhydride.(2) Epoxy: produced by reaction between epichlorohydrin and biphenol H to A.(3) Phenolic: produced by reacting formaldehyde and phenol.(4) Polyester: produced from polybasic alcohols and polybasic acids.(5) Polyethylene: composed of polymers of ethyl

Plastic Flow
SEE: Plastic Fluid.

Plastic Fluid
A complex, nonNewtonian fluid in which the shear force is not proportional to the shear rate. A definite pressure is required to start and maintain movement of the fluid. Plug flow is the initial type of flow and only occurs in plastic fluid. Most drilling fluids are plastic fluid. The yield point as determined by direct indicating viscometer is in excess of zero.

Plastic Squeezing
A procedure by which a quantity of resinous material is squeezed into the sandy rock surrounding the borehole to consolidate the sand and prevent its flowing into the borehole.

Plastic Viscosity
A measure of the internal resistance to fluid flow attributable to the amount, type, and size of solids present in a given fluid. It is expressed as the number of dynes per sq cm of tangential shearing force in excess of the Bingham yield value that will induce a unit rate of shear. This value, expressed in centipoises, is proportional to the slope of the consistency curve determined in the region of laminar flow for materials obeying Bingham's Law of Plastic Flow. When using the direct indicating visco

Plasticity
The property possessed by some solids, particularly clays and clay slurries, of changing shape or flowing under applied stress without developing shear planes or fractures. Such bodies have yield points, and stress must be applied before movement begins. Beyond the yield point, the rate of movement is proportional to the stress applied, but ceases when the stress is removed.

Plate
This term refers to a flat thin rectangular plate.

Plate Stress
Stress on a thin rectangular plate resulting from lateral pressure.

Platform
Any man-made structure installed to support drilling, production or processing operations.

Platform Allocation Meter Flag
An indicator of whether a location has an allocation meter.

Platform Commingle Production Flag
An indicator of whether a location is commingling production.

Platform Discharge Vent Flag
An indicator of whether there is approved burning or disposition of produced gas through a pipe or underwater flare.

Platform District Code
An indicator assigned to a sub-office of an Outer Continental Shelf (OCS) regional office which has delegated authority for field operations activities including: permitting wells, inspections, drilling and production operations.

Platform Gas Sale Meter Flag
An indicator of whether a location has a gas sale meter.

Platform Heliport Flag
An indicator of whether a heliport is present.

Platform Injection Code
An indicator of whether a location is injecting gas or water.

Platform Installation Date
The day, month and year that the facility was placed in the Outer Continental Shelf (OCS).

Platform Lact Meter Flag
An indicator of whether a location has a Liquid Automatic Custody Transfer (LACT) meter.

Platform ( Marine Steel)
A structure raised above the level of the water supported by pillars constructed of steel.

Platform Meter Location Number
A number that uniquely identifies a measurement facility.

Platform Name
The name commonly used to refer to a platform.

Platform Oil Production Flag
An indicator of whether a location is producing crude oil.

Platform Piping
Refers to any piping, on a platform, intended to contain or transport fluid.

Platform Production Code
An indicator of whether the platform is producing crude oil and/or gas well gas

Platform Removal Application Number
The number assigned to an application to remove a platform which is composed of the year and an incremented three digit number.

Platform Removal Approved Date
The day, month and year the application was approved by the regulatory agency to authorize the removal of the platform.

Platform Removal Received Date
The day, month and year the application to remove a platform was received in the Minerals Management Service (MMS) office.

Platform Removed Date
The day, month and year the platform was removed.

Platform Safety System
An arrangement of safety devices and Emergency Support Systems to effect platform shutdown. The system may consist of a number of individual process shutdowns and may be actuated by either manual controls or automatic devices sensing detectable abnormal conditions.

Platform Shutdown
The shutting in of all wells, process stations, and all support equipment for a platform production process.

Platform Slot
A design feature of a platform which accommodates a rig to drill or maintain wellbores from the platform while limiting the total number of wellbores that can be drilled from that platform. Wellbores can only be drilled from the slots so the number of slots determines the number of wellbores that may be drilled/produced from the platform.

Platform Structure Type Code
An indicator of the type of structure.

Platform Sulfur Production Flag
An indicator of whether a location is producing sulfur.

Platform Water Production Flag
An indicator of whether a location is producing water.

Play
Investments actions for the purpose of generating hydrocarbons.

Plug
A pipe fitting or piece of suitable material designed to fill a hole. In wellbores, a plug may be used to shut off flow of unwanted fluids.

Plug Back
The act of partly filling a wellbore with impervious materials for the purpose of shutting off lower rocks in order to permit reservoir rocks above the plugged back point to be produced.

Plug Back Measured Depth
The measured depth to the wellbore point at which the wellbore was temporarily plugged back; i.e., to set a retrievable bridge plug.

Plug Back Temporary Depth
The depth to the wellbore point at which the wellbore is temporarily plugged back.

Plug Back Total Depth
The measured depth to which a specified wellbore path was plugged back prior to setting casing or performing a well completion. If the well completion is an open hole type, the plug back total depth will be the same as reported total depth.

Plug Back True Vertical Depth
The true verticall depth to the wellbore point at which the wellbore was plugged back.

Plug Bottom Measured Depth
The measured depth to the bottom of the plug from the surface of the borehole.

Plug Diameter Measurement
The diameter of the plug.

Plug Flow
The movement of a material as a unit without shearing within the mass. Plug flow is the first type of flow exhibited by a plastic fluid after overcoming the initial force required to produce flow.

Plug Number
The sequence in which a plug was set in a wellbore.

Plug Score
An internal longitudinal groove occurring in seamless pipe, usually caused by hard pieces of metal adhering to the high mill plug.

Plug Sequence Number
The number associated with the order in which a plug is set.

Plug Top Calculated Depth
The calculated depth to the top of the plug in the hole from the surface of the borehole.

Plug Top Measured Depth
The measured depth to the top of the plug from the surface of the borehole.

Plug Type Code
An indicator of the composition of the plug.

Plug Valve
A type of quick opening valve constructed with a central core or plug. The valve can be opened or closed with one quarter turn of the plug. Also referred to as: Plug Cock.

Plugged
The state of a well or well completion that had inserted within all or part of its wellbore a solid plug of metal or concrete to prevent escape of fluids.

Plugged And Abandoned
The state of a well that has been both plugged and abandoned. Commonly abbreviated as P&A.

Plugging Material
A material used to block off zones while treating or working on other parts of wellbores. Blocking may be temporary or permanent.

Plugging Reason Code
An indicator of why a well is plugged.

Plumb Bob Effect
The pendulum action, due to the force of gravity, pulling the drillstem to a vertical position.

Plunger Lift
A method of lifting oil using a swab or free piston propelled by compressed gas from the lower end of the tubing string to the surface.

Plunging Fold
A fold in which the axis is tilted with respect to the earth's surface. The eroded surface pattern is lobate shaped. The oldest rocks crop out in the center if it is a plunging anticline and the youngest occur in the center if it is a plunging syncline.

Pm
The phenolphthalein alkalinity of the drilling fluid reported as the number of milliliters of 0.02 Normal (N/50) acid required per milliliter of drilling fluid.

Pneumatic Power System
A system which supplies pressure to operate pneumatic actuators.

Pocket
The gas lift valve receiver inside a wire line (retrievable) mandrel.

Point Of Disposition Identifier
The Point of Disposition (POD) is an identifier for the physical point of measurement of the product as it moves from the wellhead through the state or the market. Examples would be meters, Tank Batteries and LACT Units.

Point Of Entry Depth
(1) The depth at which the wellbore first intersects the top of the reservoir.(2) For horizontal wells, it is the depth at which the targeted reservoir is penetrated by a lateral/spoke.

Point Of Sale Code
An indicator of where the title to production is transferred.

Polar Organic
A compound of carbon which will adsorb on a solid surface.

Polar Plot
Plots on polar coordinate paper usually used to aid dipmeter interpretation. Polar plots may take different forms; e.g., modified Schmidt plot; azimuth frequency diagrams.

Polarity
The convention used to determine the meaning of the sign of seismic samples.

Polarity Standard
The Society of Exploration Geophysicists (SEG) standard for causal seismic data specifies that the onset of a compression from an explosive source is represented by a negative number; i.e., by a downward deflection when displayed graphically. Positive polarity for a seismic waveshape relates to an increase in acoustic impedance or a positive reflection coefficient. For a zero phase wavelet, a positive reflection coefficient is represented by a central peak.

Polarize
Retard an electrochemical corrosion reaction by deposition of a corrosion product.

Pole
The area on a magnetized part from which the magnetic field is leaving or returning into the part.

Pole Mast
Structure consisting of one or more tubular sections, telescoping or not telescoping, which are the load bearing members. The structure, when erected to working position, usually requires guylines. It may be attached to a carrier, skid base, or substructure. It is used in place of a derrick.

Pole Piece
The ferromagnetic portion of a magnetic circuit attached to the core used to shape and direct the magnetic field through the air gaps into the wall of the pipe being inspected.

Polished Rod
A rod with polished surface at upper end of sucker rod string, which passes through the stuffing box of a pumping well.

Polished Rod Clamp
A clamp which grips the polished sucker rod of a pumping well.

Pollutant
Any introduced gas, liquid, or solid that makes a resource unfit for a specific purpose.

Pollution
The presence of matter or energy whose nature, location, or quantity produces undesired environmental effects.

Poly
(1) Having several atoms, groups or molecules.(2) Prefix signifying many.

Poly Electrolysis
(1) Passage of electric currents through a solution with resultant migration of ions to positive and negative electrodes. (2) The decomposition of a chemical compound brought about by the passage of electrical currents through the compound.

Polymer
A substance formed by the union of two or more molecules of the same kind linked end to end into another compound having the same elements in the same proportion but a higher molecular weight and different physical properties; e.g., paraformaldehyde.

Polymerization
A refining process of combining two or more molecules to form a single heavier molecule.

Polynya
An areal opening in sea ice, ultimately refreezing to a thickness less than the normal ice sheet growth.

Polyphosphate
A phosphate compound used for water stabilization and corrosion inhibition.

Pond
A containment structure, normally earthen, constructed for the retention of fluids; e.g., water, discharge from a drilling rig.

Pontoon
Horizontal, cylindrical or rectangular buoyancy member of the hull structure which interconnect with columns to form a frame below the water line.

Pony Rod
A sucker rod made in short lengths of 2 ft to 8 ft.

Pool Code
The regulatory agency assigned identifier of the pool from which a well or

Pool Name
The name given to either (1) The oil accumulation from which a well or group of wells produce. NOTE: It is recommended that this term not be used within the U.S. and its territories. or(2) The reservoir of fluid formed in a decanting centrigage in which classification or separation occurs due to application of centrifugal force to accellerate solids settling rates.

Pooling
The bringing together of small tracts of land sufficient for the granting of a well permit under applicable spacing rules and as provided for in the leases being pooled as distinguished from unitization, which term is used to describe the joint operation of all or some portion of a producing reservoir.

Pooling Clause Flag
An indicator of whether or not a pooling clause is present in a lease.

Pop Valve
A valve that opens when the pressure builds up to a predetermined amount. Also referred to as Pop Off Valve.

Pop-off Valve
SEE: Pop Valve.

Popping Of Gas
The flaring, burning, or wasting of gas at a wellhead.

Pore Pressure Measurement
The interstitial fluid pressure within a formation.

Pore Space
The open space, or voids, between the individual grains of a rock mass, for fluid accumulation.

Pore Volume
The volume of pore space used to calculate the original fluid in place volumes.

Porosity
The percentage by volume of pore space within a sample. It is defined as the ratio of pore volume to bulk volume multiplied by 100.

Porosity Pressure Measurement
The pressure at which the porosity values were measured.

Porosity Type
The type of porosity for either carbonate or clastic rocks; e.g., intercrystal; breccia; leached vuggy.

Porous Zone Base Depth

Porous Zone Measured Base Depth
The measured depth at the bottom of a porous zone.

Porous Zone Measured Top Depth
The measured depth at the top of a porous zone.

Porous Zone Name
The name given to a porous zone.

Portable Mast
SEE: Derrick Mast.

Portable Well Tester
Specialized unit with all necessary separation equipment and measuring instruments to obtain fluid production measurements on a well. Unit is connected to a well or battery on a temporary basis, and can be disconnected for moving to other locations as needed.

Portland Cement Clinker
Hard granular nodules composed essentially of hydraulic calcium silicates, with smaller quantities of calcium aluminates and ferrites, produced by the heat treatment of cement raw materials in a kiln. Clinker is pulverized with the proper quantity of calcium sulfate in the manufacture of portland cements.

Positive Displacement Meter
A mechanical fluid measuring device that measures by filling and emptying chambers of a specific volume. Also referred to as: PD Meter.

Post Weld Heat Treatment
Any heat treatment subsequent to welding, including stress relief.

Postal State Code
The state code as assigned by the U.S. Postal Service.

Posted Field Price Amount
The announced price the purchaser will pay for crude oil with a specified gravity, in a particular field or area.

Potable Water
Water suitable for drinking or cooking purposes from both health and aesthetic considerations.

Potassium
One of the alkali metal elements with a valence of 1 and an atomic weight of about 39. Potassium compounds, most commonly potassium hydroxide (KOH), are sometimes added to drilling fluids to impart special properties, usually inhibition.

Potential
The total estimated oil or gas yield of a well completion, usually on a 24 hour basis. Under proration, only a portion of a high potential output is ordinarily allowed.

Potential Surface
The height that a head of fresh water would rise above a given datum plane due to the energy of the formation being tested.

Potential Test
A well test that indicates the maximum rate at which a well completion can produce.

Potential Test Rate
The tested maximum rate at which a well can produce.

Potential Test Slope Value
The slope exponent of a back pressure equation, used in calculating the potential or deliverability of a well. A slope may either be determined by a multipoint plot on a log arithmetic graph or assigned a specified value by the regulatory agency.

Potentiometer
An instrument used to measure electrical potentials.

Potting
The encapsulation of electrical components with epoxy, elastomeric, silicone or asphaltic or similar compounds for the purpose of excluding moisture of vapors. Potted components are not necessarily hermetically sealed.

Pounding Fluid
The striking down on fluid by the traveling valve of a sucker rod pump due to the pump barrel being only partially filled.

Pour Point
The lowest temperature at which a fluid will flow.

Powder Dry
A pipe surface that is sufficiently dry so as to allow any type of powder, applied to the surface, to be blown from the surface without a remaining residue.

Power Controlled Lowering
A system or device in the power train, other than the load hoist brake, which can control the lowering rate of speed of the load hoist mechanism.

Power Oil
Oil pumped down a tubing string to operate a free pump or jet pump installed downhole.

Power Pump Head
The main cover for internal parts of a power pump.

Power Rating
Rating given by a manufacturer of an engine operating at its most efficient output.

Power Take-off
A gearbox-type device serving to relay the power of a prime mover to auxiliary equipment.

Power Tight
A threaded connection that has been fully made up by mechanical means using power tongs or a screw on machine.

Power Tool
Equipment operated hydraulically or by compressed air for making up and breaking out drill pipe, casing, tubing, rods, nuts, etc.

Pozzolan
A siliceous or siliceous and aluminous material, which in itself possesses little or no cementitious value, but will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ordinary temperatures to form compounds possessing cemetitious properties.

Pozzolanic Reaction
The chemical combination of certain finely divided siliceous or siliceous and aluminous materials with calcium hydroxide to form compounds which have cementitious properties.

Precession
A comparatively slow gyration of the rotation axis of a spinning body about another line intersecting it so as to describe a cone. It is caused by the application of a torque tending to change the direction of the rotating axis.

Precipitate
Material that separates out of solution or slurry as a solid. Precipitation of solids in a drilling fluid may follow flocculation or coagulation, such as the dispersed red bed clays upon addition of a flocculation agent to the fluid.

Precipitator
A vessel designed to remove solids (undissolved and dissolved), dissolved gases, and suspended oil particulated from liquid streams.

Preflush
The well activity of purging or flushing the borehole to clean it out prior to cementing.

Preflush Fluid Density
The density of the fluid used to flush the borehole prior to cementing.

Preflush Fluid Type
The type of fluid used to flush the borehole prior to cementing; e.g., water; brine; oil; mud; oil mud; air or gas.

Preflush Fluid Volume
The volume of fluid used to flush the borehole prior to cementing.

Preheater
A steam heater or direct fired heater used to raise the temperature of the feed to a fractionator or still.

Preload
Load purposely induced in a component to improve its in service strength, fatigue life, or sealing capabilities.

Present Worth
The principal of a sum of money payable at a future date, such that this principal plus all accrued interest at the given interest rate will amount to the sum at the date on which the sum is to be paid. Also referred to as the discounted value of that sum which is to be paid.

Preservative
Usually paraformaldehyde. Any material used to prevent starch or any other substance from fermenting through bacterial action.

Pressure Base
An absolute pressure expressed in pounds per square inch absolute (psia) agreed upon as a basis for comparison of volumes of gases measured at different pressures. The standard base pressure for gas volume calculations in the United States varies from state to state, and between regulatory agencies.

Pressure Charged Valve
A gas lift valve which uses a gas charge inside the responsive element to provide the closing force for the valve. The gas is usually Nitrogen. The responsive element is usually a bellows.

Pressure Containing Part
Those parts exposed to wellbore fluids whose failure to function as intended would result in a release of those fluids to the environment, such as bodies, bonnets and stems. Also referred to as: Pressure Containing Member.

Pressure Containing Weld
A weld, the absence of which will reduce the pressure containing integrity of the part.

Pressure Drop Loss
The pressure lost in a pipeline or annulus due to the velocity of the liquid in the pipeline, the properties of the fluid, the condition of the pipe wall and the alignment of the pipe.

Pressure Extension
A value by which the corrected basis orifice coefficient is multiplied to obtain the actual flow quantity. It is numerically equal to the square root of the product of the static pressure and the differential pressure.

Pressure Gauge
A device which measures instantaneous fluid or gas pressure, ordinarily reading in pounds per square inch above atmospheric pressure (psig). Also referred to as: Pressure Gage.

Pressure Gradient Value
Uniform change in pressure from one point to another; i.e., the pressure gradient of a column of pure water is about 0.433 psi/ft of vertical elevation.

Pressure Loss
The reduction in fluid pressure within a system due to friction or lack of integrity.

Pressure Maintenance
A program to prevent or control decline of reservoir pressure as the reservoir fluids are produced, to increase ultimate recovery and profit. Ordinarily accomplished by the injection of fluids; e.g., gas; water.

Pressure Measurement
The measurement of the force per unit area.

Pressure Operated Valve
A gas lift valve that utilizes injection gas pressure as its primary operating medium.

Pressure Regulator
A device for maintaining pressure in a line, downstream from the device.

Pressure Relief Valve
A valve that opens at a preset pressure to relieve excessive pressures within a vessel or line.

Pressure Retaining Part
Those parts not exposed to wellbore fluids whose failure to function as intended would result in a release of those fluids to the environment such as closure bolts, clamps. Also referred to as: Pressure Retaining Member.

Pressure Safety Valve Setting
The setting on a valve installed on a pressure vessel or gas compressor to ensure that pressure in the vessel does not exceed safe working pressures. The valve must have sufficient pressure to discharge maximum vessel input rates when the maximum allowable pressure for the vessel is exceeded.

Pressure Sensor Depth
The measured depth to the sensor used in measuring the pressure in a borehole.

Pressure Surge
A sudden, usually short duration increase in pressure. When pipe or casing is run into a wellbore too rapidly, an increase in the hydrostatic pressure results, which may be great enough to cause lost circulation.

Pressure Survey
An operation to measure and record the pressures at various depths in the wellbore with the well completions either producing or shut in. The pressures may be measured and recorded by either a self contained unit run on a solid wireline or a unit run on an electric wireline with an instantaneous recording at the surface.

Pressure Temperature Recorder
A device used for recording pressures and temperatures in lines and vessels.

Pressure Transient Test
(1) A well test that measures pressure changes at a well completion relative to pressure changes at other well completions in the same reservoir.(2) A well test on a well completion for which the flow rate is precisely controlled to obtain pressure measurements as a function of time. The pressure transient test is used to qualitatively identify parameters that control production, such as permeability, skin thickness, reservoir boundaries. Types of pressure transient tests include drawdown, buildup and

Pressure Vessel
A vessel used to hold fluid in a liquid or gaseous state under pressure.

Pressure Vessel Quality
Metallic material whose integrity is such that it can be used to safely contain pressure without risk of leakage or rupture.

Pressurized Surge Vessel
An unfired pressure vessel used to provide for fluctuations in liquid flow to pumps.

Pretension
Tension applied to a tendon in its static, zero offset equilibrium position.

Pretest Choke Size
The inside diameter of the choke orifice before the test.

Pretest Time
The number of hours (usually 6 or more) that the well completion was produced under stablized conditions, immediately prior to the test.

Previous Authorized Cost
All previously approved costs associated with the original Authorization for Expenditure (AFE) and all revisions/supplements.

Previous Operator Name
The previous operator for a particular well, lease, unit, permit, etc.

Previous Period Correction
Restatement of a production month's measurement allocation or contract quantities in subsequent months.

Previous Taxable Amount
The previous value on which tax was based, for amended returns only.

Previously Billed Amount
The value of the original or most reent billing.

Previously Billed Volume
The volume of the original or most recent billing.

Previously Produced Reservoir Name
The name of any reservoir in which the well has been produced.

Price Per Mmbtu Amount
The value per million British thermal units (Btu).

Price Per Unit Amount
The value per unit of measure.

Pricing Method
The method for determining the product price; e.g., posted price; highest price; NGPA.

Primary Cementing
SEE: Cementing.

Primary Escape Means
Fixed stairways or fixed ladders of metal construction.

Primary Load Carrying Subsystem
Structure tying column tops together and supporting deck levels. This structure may consist of either trusses, box girders, plate girders or a combination thereof.

Primary Production
That portion of a reservoir's reserves that are recovered using pumps or the natural energy content of the reservoir and surrounding fluid, without the injection of gas, water or other sources of energy.

Primary Recovery
The stage of extraction of the primary production.

Primary Sort
The primary value used to sort data. In a multiple key sort, this value changes the most slowly.

Primary Water Treatment
The first stage in waste water treatment in which substantially all floating or settleable solids are mechanically removed by screening and sedimentation.

Prime Meridian
The name of a meridian from which longitudes are reckoned. Normally the meridian through Greenwich is defined to be the prime meridian.

Prime Mover
The source of power for a pump or other device, usually gas engines or electric motors.

Prime Pipe
Pipe meeting all of the specified inspection and testing requirements.

Principal Meridian
A meridian line accurately located and used as a basis from which to construct interior lines of monuments, called meridians, for the use of surveyors, and to assign numbers to ranges; e.g., 1st principal meridian (US); Michigan meridian; Indian meridian. The principal meridian is the basis for ranges measured east and west from that meridian.

Probe
Transducer or search unit.

Probe Grind
An exploratory grind made to determine the depth of an imperfection.

Process Capability
The ability of a process or method of nondestructive testing (NDT) to repeatedly detect a defect under normal conditions of variability.

Process Component
A single functional piece of production equipment and associated piping, used in a process station such as a separator, heater, pump or tank.

Process Furnace
A device that provides heat for processing liquids/gases (complete Unit).

Process Shutdown
The isolation of a given process station from the process by closing the appropriate shut down valve (SDV) to shut in flow to the process station or divert flow to another process station.

Process Station
One or more process components performing a specific process function; e.g., separating; heating; pumping.

Processed Gas
Gas handled through a plant for the extraction of liquefiable hydrocarbons.

Processed Gas And Plant Products Gross Sales Amount The Gross Value Received For The Year Where Plant Products Are Involved. Includes All Revenue Relating To The Production For The Reported Year, Including Tax Reimbursements And All Other Revenue Received Or Credited To All Interest Owners Not Taking In-kind And Reporting On Their Own Behalf, And Including All Federal,. State Or Tribal Royalty Owner's Interest.

Processing Agreement
Agreement between a producer and a plant owner providing for the processing of the producer's gas in a plant for a fee, either in cash or products in kind.

Processing Agreement Number
A number assigned by the company to a processing agreement.

Processing Deduction Amount
The amount deducted for processing.

Processing Rights
Provision in gas purchase contracts in which the producer reserves the right to separate and extract liquefiable hydrocarbons, except methane, and nonhydrocarbon substances from the natural gas.

Processing Rights Flag
An indicator of whether the seller has retained the right to process upstream and/or downstream from the delivery point or if the contract lacks specific processing language.

Prod
Hand held electrodes attached to cables to transmit the magnetizing current from the source to the pipe under inspection.

Prod Magnetization
Magnetization of the pipe by direct contact; i.e., passing current through the pipe wall with prods.

Produced Gas
That portion of reservoir gas recovered with fluid production from a well completion.

Produced Prior To Test Oil Volume
The measurement of oil produced prior to a test.

Producer
Any party owning, controlling, managing, or leasing any oil or gas well and/or any party who produces in any manner minerals by taking them from the earth or waters.

Producer Imbalance Quantity
The extent to which one or more owners of a property deliver to a transporter a quantity of gas (production delivery) which is more or less than their gross working interest share of total gas available for delivery (production, less used in operations) or entitlement.

Producer Liability Amount
The value on which the tax is based, for which the producer is liable.

Producer Purchaser Identification Code
The regulatory agency assigned identifier of a particular producer or purchaser name.

Producibility Index Log
A computed well log showing a comparison of various parameters important to the producibility of a reservoir rock; e.g., effective porosity; clay content; permeability index.

Producing Days On Lease Count
The total number of days that all oil or gas wells were in a producing status during the production period. On a two well lease, if one well produced 15 days and one well produced 30 days, the number would be 45.

Producing Formation Name
The name given to a rock strata or formation that is producing.

Producing Horizon
SEE: Pay Zone.

Producing Interval Code
An indicator of the number of tubing strings and identifies the producing or injection interval of the well.

Producing Interval Measured Base Depth
The measured depth to the deepest part of the producing interval.

Producing Interval Measured Top Depth
The measured depth to the shallowest part of the producing interval.

Producing Overhead Rate
The monthly rate of overhead that can be charged for one producing well. These rates are sometimes determined by depths, and are stated in an attachment to the operating agreement.

Producing String
A tubular string whose primary purpose is to allow the direct production of hydrocarbons from the well. They are therefore exposed to the flow of fluids for a large part of the operational life which may provide an extremely harsh environment. As a consequence, they are normally designed for easy retrieval and replacement. The provision for downhole wireline work is normally catered for by inclusion of profiled nipples, etc., within these strings.

Producing String Code
An indicator of whether the well is producing through the tubing or casing.

Producing Well Count
The total number of oil and gas wells in a producing status at a specified level during a specified time period. (Normally at a lease or field level).

Product
The specific commodity produced or recovered; e.g., oil, gas, water, carbon dioxide, geothermal heat, steam, helium, nitrogen.

Product Allocation Method
The method used for allocating production. Liquids may be allocated either by production or on a test basis.

Product Code
An indicator of the primary product.

Product Component Price Basis
The basis on which the value of the product component is to be determined for payment to seller/owner by contract; e.g., resale value; posted price; contract price.

Product Component Seller Due Percentage
The percentage of the product component due the seller.

Product Component Test Required Type
The type of test required by contract to determine the hydrocarbon content of a gas stream.

Product Disposition Code
An indicator of how production is disposed of , transported from lease, or destination of product. Includes codes for oil such as truck, pipeline, tank car, lost, skim liquid, scrubber oil. Includes codes for gas such as lease fuel, transmission line, vented, gas lift.

Product Value Adjustment Amount
The monetary adjustments to value of the product.

Product Value Adjustment Code
An indicator of the type of adjustment taken.

Production
(1) The yield of an oil or gas well completion.(2) Also that branch of the petroleum industry that has to do with bringing the reservoir fluids to the surface and separating them, and with storing, gauging, and otherwise preparing the product for the collection.

Production Area
Those areas where flammable petroleum gas and volatile liquids are produced, processed, stored, transferred, or otherwise handled prior to entering the transportation facilities.

Production Casing
The last string of casing which is set in a wellbore prior to production.

Production Casing Multiple Parallel String Flag
An indicator of whether there is multiple string of production casing cemented all the way back to the surface.

Production Casing Set Date
The date that the production casing was set.

Production Date
The calendar period in which production occurred.

Production Decline Curve
Curves plotted to show the producing engineering history of individual wells, well completions, leases, or fields, for the purpose of evaluating reservoir characteristics and the rate of production decline of well completions producing from the reservoir.

Production End Date
Ending date of the period the given volume was produced.

Production Incentive Minimum Volume
Minimum quantity of gas required to be produced in order to obtain the production incentive.

Production Interest Amount
The monetary share in production revenue.

Production Log
A well log run in a development or injection well. Small diameter tools are used so that they can be lowered through tubing. Services and devices include continuous flowmeter, packer flowmeter, gradiomanometer, manometer, densimeter, water cut meter, thermometer, radioactive tracer logs, temperature logs, calipers, casing collar locator, fluid sampler, water entry survey, etc.

Production Method Code
The indicator for the method used by the operator to produce the oil, gas, or water from the well.

Production Office Name
An office or offices the primary function of which is to directly serve the daily production operation and maintenance of the joint property(ies).

Production Operated Valve
SEE: Fluid Valve.

Production Payment
The right reserved by a seller to a specified percentage of the production until the proceeds, free of costs, equal a specified sum.

Production Payment Interest
An economic interest limited to a specific portion of reserves in place. The limitation may be expressed as a stated amount of production, money (including interest and other charges), or time. A production payment cannot be liquidated out of revenue from any source other than reserves produced from the property against which it is applied, or should it be guaranteed directly or indirectly. Types of production payments are: carved out, production payment, pledged reserves, ABC Production Payment, etc.

Production Payment Percentage
The portion of a property's production that is applicable to a production payment.

Production Percentage
The share of production actually taken.

Production Platform
SEE: Platform.

Production Related Costs
Most notably related to the Federal Energy Regulatory Commission (FERC) Order 94. Production related costs refer to all costs associated with bringing natural gas or liquified petroleum gas (LPG) to a marketable point of title transfer. The more common production related costs include, but are not limited to, compression, dehydration, gathering, processing, treating, liquefication, conditioning, or transporting of natural gas.

Production Start Date
A date a well or well completion is placed in a producing status.

Production Tax Flag
An indicator of whether production taxes are paid by the purchaser of the hydrocarbon stream.

Production Test
A general term for any well test of a well completion.

Production Unit Code
An agency assigned indicator identifing a well or group of wells for tax or royalty calculation and payout.

Production Unit Suffix Identifier
An identifier to further qualify a production unit number for tax and or royalty purposes.

Production Volume
The volume of production.

Production Volume Adjustment Code
An indicator of the reason for an increase or decrease to production volumes reported during the previous reporting period.

Production Well
SEE: Development Well.

Productive Horizon Abandoned Date
SEE: Well Completion Abandoned Date.

Productivity Index
A measure of a well completion's ability to produce, expressed in volume of gross liquid produced per day per unit of differential pressure between the static reservoir pressure and the well's flowing bottomhole pressure (drawdown).

Productivity Test
A well test of a well completion's capability to produce, usually conducted at various pumping or flow rates, with possible extrapolation to maximum flow. Productivity tests measure the effect of flow rates on pressures.

Profile
A profile is an internal conduit configuration used to engage tools.

Profitability Index
Essentially an internal rate of return, it is the compound interest rate whose discount factors will make the present worth of a projects net cash flow equal zero. The Profitability Index is equal to the constant effective annual percent earnings on the unrecovered capital in a project.

Project
A group of activities defined to accomplish a set of objectives.

Project Area
The joint lands, and other land areas, subject to the terms of the agreement in effect.

Project Ballot Identifier
A unique code assigned by the originator to identify the project (such as a system unique identifier, preliminary Authority for Expenditure ( AFE) document number, work order number, etc.). It is the operator's internal number and is used when the AFE number is not available.

Project Comment
Additional information that describes the project.

Project Description
A concise narrative description of the project proposal.

Project Support Facility
Those facilities located within or near the project area that during the conduct of joint operations provide such service to the joint operations as a point for receiving and transshiping material; a point of debarkation for drilling personnel and services; a communication, scheduling, and dispatching center; and other associated functions benefitting the joint operations; e.g., workshops, field offices, camps, airstrips, heliports, harbors, docking facilities, staging areas, and housing for employees.

Property
A unique entity, that can be a producing property (oil or gas), compressor station, tool account, plant, store, system, etc., for revenue and expense and/or investment to which accounting transaction are related.

Property Event Description
The description of the event which occurred resulting in the creation or change of the property recording; e.g., change in operator; sale of the property; working interest change.

Property Number
The number assigned that uniquely identifies a property.

Property Type
Indicates if the property is a producing property, enhanced recovery, royalty property, salt water disposal, tool account, etc.

Proportional Band
That percentage of the controller's range which operates the controlled valve over the valve's full range.

Proportional Limit Stress
Stress above which the stress-strain curve is no longer linear and which represents the onset of plastic behavior.

Proportional Reduction
A clause commonly included in a contemporary lease providing for the reduction of payments to a lessor if his interest is less than that which he purported to lease.

Proposed Bottomhole Location
Intended location of the wellbore bottomhole.

Proposed Project Completion Date
The date the proposed project is estimated to be completed.

Proposed Project Start Date
The date the proposed project is estimated to begin.

Proposed Well Total Depth
The total measured depth of the well that has been proposed to reach the targeted wellbore bottomhole location.

Proppant
Granular material used to prop open hydraulically created fractures.

Propping Agent
SEE: Proppant.

Propping Volume
The volume of proppant used in treating an interval during an initial potential or production test.

Proprietary Code
An indicator of the status of the release of privately owned information and data that are not available for public review or distribution to the public, as specified by law, regulation, order, or policy. Regulatory agencies define such data as proprietary data; e.g., electric logs, core descriptions and analysis, seismic record section, geological, geophysical, engineering information, maps; reports, correspondence, based on or containing information furnished by industry sources to the agency in compli

Proprietary Data Release
SEE: MMS Well Data Release Code.

Prorate
As applied in the petroleum industry, pertains to the allocation of oil or gas production among the properties producing from a common reservoir or among the fields in a given state on some agreed or enforced basis. Among the factors used as a basis for proration are acreage, number of wells or well completions, well potential, or a combination of these and other factors.

Proration
A system enforced by the regulatory agency or by agreement between operators which limits the amount of oil which can be produced from a particular well, well completion; reservoir or field within a given period.

Proration Unit
An area attributed to a well by a regulatory agency in order to control development drilling in an oil or gas field.

Prospect
Drilling opportunities which, if successful, will endure as producing fields until depleted or abandoned.

Prospect Name
The name assigned to a prospect.

Protection Casing
SEE: Intermediate Casing.

Protective Wall
A barrier designed to withstand or deflect falling or flying objects, prevent flow of liquids from one area to another or restrain minor explosions.

Prototype
A preliminary unit of a specific design with essential functionality for purposes of testing and demonstration; e.g., manufactured component or piece of software.

Proved Acres
(1) Area believed to contain economically producible hydrocarbon reserves.(2) Also be used in context of maximum limits of the proved portions of all producing zones.

Proved Reserves
Reserves of minerals that can be estimated with reasonable certainty to be recoverable under current economic conditions. Current economic conditions include prices and costs prevailing at the time of the estimate. Proved reserves musthave facilities to process and transport the reserves to market that are operational at the time of the estimate, or there is commitment or reasonable expectation to install such facilities.

Prover
A device used to calibrate meters used in measuring oil volume.

Province (canadian)
The legal description is composed of either a dominion land survey or a National Topographic System (NTS) identifier. The dominion land survey identifier consists of a township, meridian, range, section, legal subdivision, exception, event sequence, and survey system. The NTS identifier consists of a NTS code, map code, number code, block code, unit code, sub unit code, and location exception.

Proximeter
A remote sensing device used to detect change; i.e., vibration, movements.

Prudhoe Bay Unit Of Alaska
Under the Natural Gas Policy Act (NGPA), 1978, as amended, the geographical area subject to the voluntary unit agreement approved by the Commissioner of the Department of Natural Resources of the State of Alaska on June 2, 1977.

Pseudoplastic Fluid
A complex non Newtonian fluid that does not possess thixotropy. A pressure or force in excess of zero will start fluid flow. The apparent viscosity or consistency decreases instantaneously with increasing rate of shear until at a given point the viscosity becomes constant. The yield point as determined by direct indicating viscometer is positive, the same as in Bingham plastic fluids; however, the true yield point is zero. An example of a pseudoplastic fluid is guar gum in fresh or salt water.

Psia
An absolute pressure value obtained by adding gauge pressure to atmospheric pressure. The acronym for pounds per sqyuare inch absolute.

Pto
SEE: Power Take-Off.

Ptr
SEE: Plant Thermal Reduction.

Puddling
(1) In cement evaluation work, the agitation of cement slurry in molds with a rod to remove trapped air bubbles.(2) In field practice, the movement by reciprocation or rotation of the casing during or after the cementing operation.(3) A type of cementing operation wherein the cement slurry is spotted in open hole through drill pipe or tubing, the casing is then run in the well and puddled into cement. Also referred to as: Puddle Job.

Pugh Clause Flag
An indicator of whether a Pugh clause is present in the lease instrument; i.e., the portions of the lease not involved in production are not held by production.

Pulling Cost
The expense of servicing wells by pulling and repairing rods, tubing, or the pump.

Pulling Flange
SEE: Fishing Neck.

Pulling Line
The cable on a servicing unit winch used to raise and lower the rods and tubing in the derrick while servicing a well.

Pulling Machine
SEE: Pulling Unit.

Pulling Tool
A hydraulically operated tool that is run in above the fishing tool and anchored to the casing by slips. By means of hydraulic power derived from fluid that is pumped down the fishing string, the pulling tool exerts a strong upward pull on the fish.

Pulling Unit
A portable, truck mounted mast equipped with winch, wire lines, and sheaves, used for pulling sucker rods or preforming a well workover.

Pulsation Dampener
A device used to reduce surge; i.e., a chamber containing a pressurized bladder used to reduce liquid surge from a pump.

Pulse
(1) A short wave train of mechanical vibrations.(2) A wave of short duration.

Pulse Echo Method
A single crystal ultrasonic test method that both generates ultrasonic pulses and receives the return echo.

Pulse Length
The time between the points at which the instantaneous value of current exceeds 10% of the maximum pulse current.

Pulse Rate
For the pulse method, the number of pulses transmitted in a unit time. Also referred to as: Pulse Repetition Rate.

Pulse Tuning
Control on some instruments used to optimize the response of the search unit and cable to the transmitter by varying the frequency.

Pulser
Electronic device and probe for generating a controlled magnitude magnetic pulse for standardizing transducers.

Pump
A rotating or reciprocating machine together with its driver and associated pipe, valves, pulsation dampners, etc., used to transfer fluids; e.g., sucker rod; reciprocating; centrifugal; rotary; gear; jet.

Pump Bowl
A portion of the pump of a vertical turbine or hydraulic pumping system.

Pump Compressor Pressure Measurement
The pressure used to pump mud into the drillstring at the pump discharge or the manifold.

Pump Cup
A form of piston used in reciprocating pumps.

Pump Horsepower
The rated horsepower of the pump.

Pump Impeller
The wheel like fan inside a centrifugal pump that impels or propels the fluid forward and out of the discharge opening. As the impeller turns at high speed, it pulls in the fluid at the suction opening of the pump and, with numerous vanes (small fixed blades) on the impeller, impels the liquid around the circular body or housing of the pump, into the discharge opening, and on to the pipeline.

Pump Input Horsepower
Mechanical horsepower put into the pump.

Pump Liner
A cylindrical, accurately machined metallic section of reciprocating pumps.

Pump Off
To pump so rapidly that the oil level drops below the standing valve on the pump.

Pump Output Horsepower
Hydraulic horsepower put out by pump.

Pump Piston Diameter
Size of the pump cylinder or piston diameter.

Pump Piston Stroke Length
The length of the pump stroke.

Pump Stroke
The vertical distance the sucker rods travel in a pumping well, as measured at the polished rod.

Pump Stroke Frequency
The stroke frequency in strokes per minute for the pump used during this bit run.

Pump Through Tubing Plug
A plug set inside the tubing string which will not permit back flow, but will permit pumping through from the top side.

Pumpdown
The hydraulic transport and manipulation of tools.

Pumper
(1) A workman who produces oil wells.(2) An oil producing well which does not flow its production but requires artificial lift.

Pumping
(1) Act of moving fluids by mechanical means, plunger pump, jet pump.(2) In a wellbore, the act of lifting fluid to surface by artificial lift.

Pumping Unit
Surface equipment assembled for the purpose of performing artifical lift in a borehole.

Pup Joint
A joint of tubular goods shorter than standard length.

Purchase Agreement
An agreement for the purchase and sale of oil and/or gas produced from designated leases, setting forth the terms and conditions of purchase and sale, and the requirements as to the quality, condition, measurement and quantity of the product.

Purchased Volume
The volume of product purchased.

Purchaser Identifier
The identification number or code assigned to a purchaser.

Purchaser Liability Amount
The value on which the tax is based, for which the purchaser is liable.

Purchaser Name
(1) The name of the person, firm, company, or corporation entering into a contract or agreement for purchase.(2) COPAS: The party who buys the gas from a supplier. A purchaser has the obligation to pay for gas based on the gas purchase contract.

Purchasing Percentage
The percentage of volume the purchaser receives from the royalty volume allocated to the state.

Purged Enclosure
An enclosure supplied with clean air or an inert gas at sufficient flow and positive pressure to reduce to an acceptably safe level the concentration of any flammable gases or vapors initially present, and to maintain this safe level by positive pressure with or without continuous flow.

Purifier
A vessel in which undesirable heavy ends are removed from a stream by vaporizing material within a desired boiling range.

Put A Well On
To start a well producing.

Put On Pump
To install or activate an artificial lift pumping system to produce a well completion.

Pvc
Polyvinylchloride.

Pvf
Abbreviation for: Pump Volume Factor.

Pvr
SEE: Plant Volume Reduction.

Pvt Analysis
An examination of reservoir fluids in a laboratory under various pressures, volumes and temperatures (PVT) to determine the characteristics and behavior of the fluid.