W
Wait Time After Resin Placed
The time spent waiting for the resin used in the plastic consolidation treatment to cure.
Waiting On Cement Time
After the casing has been cemented, it is necessary to suspend operations and allow time for the cement to set or harden in the borehole. The time during which operations are suspended is designated as waiting on cement.
Walk Of Bit
The tendency of the drill bit to turn into the side of the borehole while rotating, which will change the direction of the borehole axis unless corrected.
Walk Of Hole
The tendency of a borehole to deviate naturally because of the rotating of the bit and the anisotropic nature of the rocks being drilled.
Walking Beam
(1) An oscillating bar or beam, pivoted at the center, used to actuate a sucker rod pump.(2) In cable tool drilling, the walking beam transmits motion to the drilling tools. Also referred to as: Beam.
Wall Cake
The solid material deposited along the wall of the borehole resulting from filtration of the fluid part of the drilling fluid or cement slurry into the rocks.
Wall Sticking
SEE: Differential Pressure Sticking.
Washout
Excessive borehole enlargement by solvent or erosional action of the drilling fluid.
Washout Percentage
An estimated percentage of the washout or hole enlargement used in calculations; e.g., real annualar volume divided by the gauge hole volume.
Washover
A procedure wherein pipe, commonly called wash pipe, larger than the fish is slipped over the fish and usually rotated to bottom with circulation to free the fish.
Waste Water
Water carrying wastes from homes, businesses, and industries that is a mixture of water and dissolved or suspended solids.
Water Block
Reduction of the permeability of a formation caused by the invasion of water into the pores (capillaries). The decrease in permeability can be caused by swelling of clays, thereby shutting off the pores, or in some cases by a capillary block of the pores due to surface tension phenomena.
Water Body Depth
The measured depth of the water body, from a specified datum at a specified location.
Water Bottom
The interface between a body of water and its underlying lithofacies.
Water Bottom Zone
The physical zone of water bottom used in Louisiana (offshore) to identify special allowable area or zone.
Water Cement Ratio
The ratio by weight of water to cement in a cement slurry.
Water Column
Thickness of a water layer; e.g., existing in the reservoir rock or refining process, etc.
Water Coning
SEE: Coning.
Water Current Direction
The direction, relative to true north, from which the water current is coming.
Water Current Speed
The average speed of the water current measured.
Water Cut
The volume fraction of water in the total volume of liquid produced from a well completion.
Water Depth
The depth of the water at a well/platform location from the water level to the mud line.
Water Disposition Volume
The volume of water disposed of during a reporting period.
Water Drive
Reservoir drive mechanism whereby oil is produced from a hydrocarbon reservoir, derived from hydrostatic or hydrodynamic pressure transmitted from the surrounding aquifer. Energy of the drive forces reservoir fluids to the borehole.
Water Flood
The injection of fluids into an oil reservoir to maintain the reservoir pressure or to extract hydrocarbons from the reservoir beyond what can be recovered by normal methods of flowing or pumping.
Water Flood Kick
The first indication of increased oil production as the result of a water flood project.
Water Formation
A zone that contains only water and no hydrocarbons.
Water Hardness
The hardness of water is due principally to the calcium and magnesium ions present in the water and is independent of the accompanying acid ions. The total hardness is measured in terms of parts per million of calcium carbonate or calcium and sometimes equivalents per million of calcium.
Water Injection
Water injected into a formation to maintain or restore reservoir pressure to enhance ultimate recovery of hydrocarbons.
Water Knockout
A baffled vessel designed to remove water from a gas stream or water from oil.
Water Level Depth
Measured depth to the water contact level in the wellbore.
Water Of Hydration
The water chemically combined with the solid to form a crystalline compound.
Water Path
The distance from the transducer to the test surface in immersion or water column testing.
Water Pollution
The addition of sewage, industrial wastes, or other harmful or objectionable material to water in concentrations or in sufficient quantities to result in measurable degradation of water quality.
Water Quality Criteria
The levels of pollutants that affect the suitability of water for a given use; generally, water use classification includes: public water supply, recreation, propagation of fish and other aquatic life, agricultural use, and industrial use.
Water Quality Standard
A plan for water quality management containing four major elements: the use (recreation, drinking water, fish and wildlife propagation, industrial, or agricultural) to be made of the water; criteria to protect those uses; implementation plans (for needed industrial municipal waste treatment improvements); and enforcement plans and an antidegradation statement to protect existing high quality waste waters.
Water Rate Per Well Test Before Work
The volume of water produced during a well test, calculated over 24 hours, before the proposed work has started.
Water Resistivity
Measurement of the resistance of water to the passage of electricity.
Water Resistivity Temperature
The temperature of the water sample at the time its resistivity was measured.
Water Saturation Method Code
Indicates how the water saturation was determined.
Water Saturation Percentage
The percentage of the porosity volume that is saturated with water.
Water Saver
A chamber may be directly connected to the heater shell to permit the shell to be completely filled with water. The water in this chamber exists at a lower temperature than the heater bath which reduces evaporation losses. It may also be referred to as an economizer or expansion tank. Its capacity should be sufficient to contain the water expansion between ambient and operating temperatures.
Water Siphon
A piping system for the controlled flow of water from the treater which sets the water/oil interface level within the treater. To accomplish this control the water flows through a vertical loop of piping set at an adjustable level below the treater oil level with the top of the loop equalized in pressure with the gas zone of the treater. Also referred to as: Water Leg.
Water Solids Ratio
The ratio by weight of water to the total solids in a cement slurry.
Water Source Type Code
An indicator of the type of water source.
Water Surface Pit Volume
Water sent to a pit which is utilized for disposal by evaporation or seepage.
Water Table
The point in the subsurface below which pores of the rock or sediments are filled with water or other fluids.
Water Tanks Count
The number (count) of water tanks on a facility.
Water Type
The type of water encountered during the production test; e.g., black water; brackish water; basic sediment & water; fresh water; salt water.
Water Volume
The total volume of water the well completion or reservoir produced for the specified month.
Water Well
(1) A well that produces water or yields groundwater samples or engineering data.(2) A regulatory designation of water well by the operator.
Water Well Column
The portion of a vertical turbine pump through which the shaft operates and fluid is pumped from the reservoir to the surface.
Water Zone Measured Thickness
The measured thickness (uncorrected) of the water portion of the hydrocarbon zone.
Water Zone True Vertical Thickness
The corrected true vertical thickness of the water portion of the hydrocarbon zone.
Wave Direction
The direction, relative to true north, from which the water waves are coming at the time the record is generated.
Wave Front
A continuous surface drawn through the most forward points in a seismic wave disturbance which have the same phase.
Wave Height
The average height of local water waves.
Wave Length
The distance in the direction of propagation of a seismic wave for a complete cycle.
Wave Number
(1) The number of seismic waves per unit distance perpendicular to a wavefront; i.e., the reciprocal of the wavelength.(2) Spatial frequency, the number of seismic wave cycles per unit of distance in a given direction (direction of spread).
Wave Train Log
An acoustic log in which the acoustic wave train is displayed in either the intensity modulated time mode or the amplitude time mode.
Wavefilt
A wavelet (W) or digital filter (F) are differentiated in terms of their effects on a physical process and to data representing it. In seismic, the physical process is a reflection series (R) and the data are the seismic trace values (T). The wavelet is defined by W*R=T and the digital filter by R=F*T, where * represents convolution. A filter is the inverse of a wavelet. Either a wavelet or a filter can be described in terms of both its frequency spectrum and time spectrum.
Wavelet
The time domain reflection shape from a single positive reflector at normal incidence.
Wavelet Estimation Method
Method by which the wavelet was determined.
Wavelet High Cutoff Frequency
The frequency at which a filter response is down to three (3) db in amplitude.
Wavelet Peak Amplitude
Peak amplitude of the wavelet.
Wavelet Peak Frequency
Peak frequency of the wavelet.
Wavelet Phase
Phase characteristic of the wavelet; e.g., zero phase; minimum phase; degree of angle shift.
Wavy Thread
A cyclic variation in the helix angle of a thread, and/or its radial location.
Weathered Crude
Crude oil which has lost an appreciable quantity of its entrained gas due to evaporation during storage.
Weathering
(1) The stabilization of a hydrocarbon mixture by the evaporation of light ends to the atmosphere.(2) The deterioration of equipment surfaces due to exposure to the elements.(3) The disintegration of rock through physical and chemical processes.
Weathering Layer
A near surface low velocity layer, usually the portion where air rather than water fills the pore spaces of rock.
Wedge
A device used to direct ultrasonic energy into the material at an angle.
Weight Indicator
An instrument that shows the weight suspended from a wireline or hook.
Weight On Bit
The force placed on the bit during drilling operations.
Weld
SEE: Welding.
Weld Area Crack
A crack in or immediately adjacent to the weld line. A stress induced separation of the metal which, without any other influence, is insufficient in extent to cause complete rupture of the material.
Weld Groove
An area between two metals to be joined that has been prepared to receive weld filler metal.
Weld Joint
The way components are fitted together in order to facilitate joining by welding.
Welding
The fusion of materials, with or without the addition of filler materials.
Welding Neck Flange
A flange with a neck on the side opposite the sealing face prepared with a bevel to weld to corresponding pipe or transition pieces.
Well
A well is an association context within which are related information and samples obtainable from the process of planning, creating, utilizing and financially accounting for one or more connected holes drilled into the earth (wellbore). A well serves a means for associating, for example, wellbore characteristics, equipment installed or used on the surface or within a well's wellbore, fluids produced or injected, as well as related legal contracts, activities and cost accounting.
Well Abandonment Authorized Cost
The estimated costs associated with abandoning the well.
Well Action Code
Tan indicator of the next expected action the operator is planning to take on the petroleum well.
Well Activity Code
An indicator of the operation being performed on a well or any part thereof; e.g., permitting, location preparation, drilling, well logging; fishing, testing, coring, completing, abandoning.
Well Activity Date
SEE: Current Well Activity Date.
Well Borehole Log File Identifier
A unique character, assigned sequentially, which serves to identify Well Log Tape and Disk Files containing different types of data for a single well.
Well Casing Liner
A string of casing whose top is located below the surface and is used for protecting pressure-producing formations.
Well Change Effective Date
The date certain changes were made to the well record.
Well Classification Code
An indicator of the classification of intent of the well by regulatory agencies; e.g., Wildcat, Dry; Exploration Well; Development Well Gas; Development Well Gas Workover; Abandoned Producer; Deeper Pool Wildcat; Corehole; Success; Geothermal Wildcat.
Well Classification System Type
The system; e.g., Lahee, AAPG Committee on Statistics of Drilling (CSD), used to classify the well.
Well Completion Abandoned Date
The abandoned date for the indicated zone or well completion.
Well Completion Base Depth
The base measured depth depth of the interval of the well completion.
Well Completion Classification Code
An indicator of the well completion as derived from the major fluid, i.e., oil, gas, water, etc.
Well Completion Count
The actual number of well completions. .
Well Completion Date
(1) Oil well or gas well: the date on which the installation of permanent equipment is completed (for the production of oil or gas) as reported to the appropriate agency.(2) Dry hole: the date of abandonment as reported to the appropriate regulatory agency (Synonymous with Abandoned Date).(3) Service well: the date on which the well is equipped to perform the service for which it was intended.
Well Completion Falloff
The injection rate and duration of any falloff test on a specific well completion.
Well Completion Operation
SEE: Well Completion Project.
Well Completion Project
The work conducted upon a well's wellbore to establish production of the resource or injection of fluids after the production casing string has been set, cemented, and pressure tested, including perforating casing, setting packers and tubing, setting the wellhead in place. For a finished well, each completion within its wellbore establishes production from or injection to a single zone, or commingled production from mulitple zones, as allowed by the well's regulatory agency. Statistical summaries involvin
Well Completion Status Code
An indicator of possible conditions that could affect the well's performance; e.g., active; shut in; intermittent; plugged and abandoned, sold.
Well Completion String
SEE: Producing String.
Well Completion Substance Code
An indicator of the primary substance injected into or produced from the well completion.
Well Completion Technique
The method used for well completion; e.g., open hole, perforated, gravel pack.
Well Completion Test
A test conducted on a well completion to determine its productivity and engineering characteristics.
Well Completion Test Date
Date a well completion test was conducted.
Well Completion Test Interval Base Depth
The base measured depth of the interval of the well completion being tested.
Well Completion Test Interval Top Depth
The top measured depth of the interval of the well completion being tested.
Well Completion Test Type
The type of test conducted on a well completion; e.g., buildup, fall off, productivity, injectivity, initial potential.
Well Completion Top Depth
The top measured depth of the interval of the well completion.
Well Completion Type Code
An indicator of the type of well completion, e.g., single, dual, triple, commingled.
Well Completion Type Effective Date
Date the given well completion type was effective.
Well Completion Zone
The producing interval within a well associated with a reservoir.
Well Completion Zone Name
The name of the zone assigned the well completion.
Well Connection Date
The date a well completion zone is connected to a gathering pipeline. The well connection date is required to be known only for the movements of product from the field to a gas processing plant. The date is used to determine the rate the pipeline charges for the transportation of liquids and liquefiables. For wells connected prior to January 1, 1982, one set of rates (based on barrels or MCFs per mile) is applicable. For wells connected after January 1, 1982, a different set of rates (based on barrels o
Well Contract Authorization Date
The date a well activity was authorized; e.g., drilling, recompletion.
Well Conversion
Physically changing the function of a well from one use to another.
Well Cored Flag
An indicator of whether a well was cored
Well Count
The number of wells in the lease, field, etc.
Well Days Count
The total hours operated in month divided by 24.
Well Dedication Type
Used to identify whether the well was dedicated through the original contract or through an amendment to the contract. Examples include: Amendment; Original contract.
Well Depth
SEE: Measured Depth.
Well Development/exploration Code
Classifies the well as exploratory, development, or both.
Well Deviation Depth
The depth at which the wellbore path deviation measurements were taken.
Well Elevation Height
The distance above a specified reference datum, commonly the surface of the earth, derrick floor, or Kelly bushing. A positive value denotes a point higher than the reference point. When given without specifying a reference value, it is assumed that the elevation is referenced to mean sea level datum.
Well Gross Volume
The total quantity of product the well and or reservoir produces for a specified period.
Well Identifier
The identifier value used to distinguish wells from each other.
Well Identifier System
The system or convention of the well identifier value; e.g., API Well Number; CPA Number.
Well Identifier Type Code
A code identifying the international governing body assigning the unique well identifier.
Well Integrity Test Frequency Count
The approved maximum interval between well integrity tests.
Well Job Type
SEE: Well Activity.
Well Kind Code
A code indicating the kind or type that a well or completion zone is or is anticipated to be; e.g., oil, gas, carbon dioxide gas, service, etc.
Well Location
The location of the well.
Well Location At Total Depth
Well Location Description
Narrative description of the well location.
Well Log
(1) A log of wellbore data for a well; e.g., electric log, drilling fluid log.(2) A log of well activity data; e.g., drilling time log, penetration rate log.
Well Log Interval Measured Bottom Depth
The measured depth to the bottom of the logged interval.
Well Log Interval Measured Top Depth
The measured depth of the top of the logged interval.
Well Log Received Date
The date the well log(s) was/were received.
Well Log Run Date
The date the petrophysical log was run.
Well Logging
The well activity producing a well log.
Well Name
A name assigned to the well; e.g., a special name or one derived from the name of the property with which the well is associated.
Well Name Code
An iindicator of the well name assigned by a regulatory agency.
Well Number
A modifying designator assigned to a well and may be associated with the well name; e.g., Jones # 1; B-1.
Well Operation Condition Code
An indicator which describes well operating conditions and, in some instances, equipment being used in operations; e.g., pump (rod); pump (electric motor); pump (hydraulic); plunger (lift); flowing; service well (active); repair operations (suspended); shut in (lack of market).
Well Operation Method Code
An indicator of the method of injecting the primary substance into or producing the primary substance from a well completion.
Well Pad
A site prepared to drill and/or produce one or more wells.
Well Pad Construction Contractor Name
The name of the contractor constructing the well pad.
Well Pad Construction Start Date
The date the operator started construction (surface disturbance) on the well pad.
Well Pad Construction Start Time
The actual time (to the minute) the operator starts construction (surface disturbance) on the well pad.
Well Permit
The permit to drill or modify an existing well.
Well Permit Number
An identifier assigned by regulatory agencies to a well permit.
Well Platform
SEE: Platform.
Well Product Stream Component Code
The individual components, component mixtures or compounds that are identifiable and measureable and exist as an integral part of any one of a well's product streams.
Well Profile
The projection of a wellbore path onto a plane.
Well Serial Number
SEE: Well Identifier.
Well Servicing
Maintenance and repair work performed on well facilities to improve or maintain existing production. Well servicing usually involves repairs to installed equipment, such as pumps, rods, gas lift valves, tubing, packers etc. Also refers to businesses doing this work; e.g., a well servicing company.
Well Servicing Rig
Equipment and machinery used for well servicing activities, such as pulling or running tubulars or sucker rods, recompleting, workover, and abandoning.
Well Shut-in Code
An indicator of the reason a well is not producing or is temporarily abandoned.
Well Simulation Test
A test performed in accordance with API Spec 10 under conditions simulating those encountered in wellbores.
Well Site Approval Date
The date that the well site was restored (all recontouring/seeding done) and approved by a regulatory agency.
Well Site Approval Type Code
The indicator for the type of approval given for various operational parameters.
Well Spacing
SEE: Spacing.
Well Split Effective Date
The effective date when a well record is split from an Inspection Item Identification (IID).
Well Stake
SEE: Stake.
Well Staked Date
The date the well location was staked.
Well Status Change Date
The date that the well status was updated. This applies to both changes resulting from field inspections and changes resulting from a document submitted .
Well Status Code
An indicator of the operational state of the well reported as a well activity for a time period. Well status requires associated date/time information.
Well Surveying
The act of running an instrument into a wellbore to obtain a specific kind of information.
Well Test
The measurement of any factor or factors relating to production or injection of fluids from or into a well's wellbore for a given length of time for an established set of conditions to assist in prediction of production or injection capability.
Well Test Flow Rate
A flow rate measurement recorded during a well test flowing phase.
Well Test Flowing Phase
A well test phase within which the test equipment allows the well to flow while other measurements, such as pressure and flow rate, are recorded.
Well Test Injection Phase
A well test phase within which the test equipment are injecting while other measurements, such as pressure, are recorded.
Well Test Injection Rate
The measured rate of fluid injection recorded during an injection phase of a well test.
Well Test Installation Phase
An optional initiating well test phase, when test equipment is installed within the wellbore, such as the running in of the drillstem for a drillstem test. This well test phase will be absent if the well test uses equipment previously installed, as with most tests of a well completion. Measurements may be recorded during this phase, such as hydrostatic pressure while running in the drillstem.
Well Test Line Pressure
The back pressure exerted by the pipeline while conducting the well test.
Well Test Phase
A subset of a well test within which a set of related measurements versus time are recorded while other conditions are kept constant. A well test is bounded by phases within which test equipment is installed and removed. Each well test phase is bounded by initial and final measurements, such as initial shut in pressure for a shut in phase. Initial and final measurements are linked to initial and final time stamps, which bound the well test phase time interval. Measurements within the phase time interva
Well Test Phase Final Time Stamp
The last well test phase time stamp recorded within a well test phase.
Well Test Phase Initial Time Stamp
The first well test phase time stamp recorded within a well test phase.
Well Test Phase Sequential Discriminator
A sequential discriminator associated with a well test phase to differentiate the phase from others of that well test and to place the phase in time sequence with the other well test phases of that well test.
Well Test Phase Time Interval
The duration between the well phase initial time stamp and the well phase final time stamp.
Well Test Phase Time Stamp
A time stamp recorded for each measurment within a well test phase.
Well Test Product Disposition
The method used to dispose of or distribute hydrocarbon and water production recovered during a well test.
Well Test Reason Code
An indicator of the purpose for which the test is submitted.
Well Test Removal Phase
An optional terminating well test phase, when test equipment is removed from the wellbore, such as the running out of the drillstem for a drillstem test. This well test phase will be absent if the well test uses equipment previously installed, as with most tests of a well completion. Measurements may be recorded during this phase, such as hydrostatic pressure while running out the drillstem.
Well Test Report Number
A report number (identifier) for a well test.
Well Test Shut- In Phase
A well test phase within which the test equipment are shut-in while other measurements, such as pressure, are recorded.
Well Test Static Reservoir Pressure Phase
The well test phase within which the static reservoir pressure is measured.
Well Test Type Code
An indicator of the type of well test that was performed; e.g., build up, fall off productivity, injectivity, drillstem test, wireline.
Well Tester
(1) A unit to measure production from a well.(2) One who performs well tests. The title is usually reserved for one whose duty involves only well tests, or may be one who performs specialized tests; e.g., bottomhole pressure measurement.
Well Total Measured Depth
The measured depth to the bottom of the borehole as recorded by either the driller or by the wireline method. Often abbreviated as TD or Well TD.
Well Total True Vertical Depth
The vertical, straight-line depth from the surface datum to the wellbore bottomhole. Often abbreviated as Well TVD.
Wellbore
Wellbore is the connected network of borehole within the earth. A wellbore has a minimum of one wellbore origin and one wellbore bottomhole. A well has no more than one wellbore.
Wellbore Completion Count Code
An indicator of the classification of a wellbore based on the number and/or type of completions. i.e. single, dual, triple, multiple, downhole commingle,etc.
Wellbore Evaluation
Any identifiable process which allows information/samples of a downhole formation to be acquired. The common processes used within the industry are: coring, electric logging, and mud logging.
Wellbore Intersection
A point within a wellbore where wellbore paths converge or diverge, such as the point at which an existing wellbore is re-entered below the surface by drilling from another wellbore origin, or the point at which sidetrack drilling is initiated within an existing wellbore.
Wellbore Origin
A point of initiation of drilling at the earth's surface for a wellbore. A wellbore may have more than one wellbore origin.
Wellbore Path
A unique, nonoverlapping path within a wellbore from a specific point of inception at the earth's surface (Wellbore Origin) to a specific point of ultimate extent in the subsurface (Wellbore Bottomhole). The wellbore path nominally follows the axis of the physical borehole created by drilling between these two points. Wellbore paths can intersect and can share parts of their extents.
Wellbore Path Basis
Information about the technique, method or conditions under which a position measurement is recorded along a wellbore path, e.g., logger, operator (counting pipe stands), directional survey, strokes of mud pump. The wellbore path basis can be used to distinguish among multiple measurements from the same wellbore path datum along the same wellbore path.
Wellbore Path Datum
The origin of the zero point of reference for measuring along a wellbore path to a wellbore point. Ground level, derrick floor and kelly bushing are typical zero point references for linear measurements along a wellbore path (Measured Depth).
Wellbore Point
A point position within a wellbore.
Wellbore Point Code
An indicator of the point position within a wellbore; e.g., surface hole location, kickoff point, entry point, exit point, bottomhole location, etc.
Wellbore Segment
The extent of wellbore between two wellbore points along a wellbore path.
Wellbore Survey Calculation Method
SEE: Borehole Survey Calculation Method.
Wellbore Terminus
A wellbore bottomhole is an ultimate extent of borehole penetration for a wellbore. A wellbore may have more than one wellbore bottomhole.
Wellhead
The equipment used to maintain surface control of a well. A wellhead consists of the casinghead, tubing head, and appropriate valves. The Christmas tree is installed on top of the tubing head.
Wellhead Area
That area that surrounds the individual wellhead.
Wellhead Assembly
A term applied to the assembly of valves and fittings at the casinghead and the tubing head.
Wellhead Pressure Measurement
The shut-in surface pressure of a well completion.
Wellhead Rated Pressure Measurement
The API maximum wellhead pressure rating.
Wellhead Value
The value of oil or gas at the mouth of the well. In general, might be considered to be equal to the sales proceeds less the costs of making the production merchantable, such as treating, compression, dehydration, and gathering costs. Precise definition would be based upon provisions of the applicable lease agreement, contract, or tax regulation.
Wentworth Scale Of Measurement
A logarithmic grade scale for size classification of sediment particles.
Wet Gas
Gas that contains a significant volume of liquefiable hydrocarbons.
Wet Gas Returned Nonexempt Volume
The volume of wet gas returned to lease in excess of allowances.
Wet Gas Returned Volume
The volume of wet gas used on lease for fuel, lift, etc.
Wet Job
Pulling tubing full of oil or water.
Wet Method
The magnetic particle inspection method employing ferromagnetic particles suspended in a liquid bath.
Wet Oil
Oil containing such quantities of water as to render it unmarketable until the water is removed.
Wet Or Dry Facility Flag
An indicator of whether or not the gas pipeline system has been contractually designated as being open to the receipt of gas containing liquids at the facility.
Wet String
Refers to a string of tubing from which the standing valve has not been removed so that pulling and unscrewing each stand of tubing releases oil or water on to the derrick floor. May also apply to drill pipe.
Wetting
The adhesion of a liquid to the surface of a solid.
Wetting Agent
A chemical or composition which, when added to a liquid, reduces the surface tension and increases the spreading of the liquid on a surface or the penetration of the liquid into a material.
Whipline
A secondary rope system usually of lighter load capacity than provided by the main rope system. Also referred to as: Auxiliary Hoist.
Whipstock
A round steel shaft designed to set in the wellbore at some predetermined depth for the purpose of deflecting the drilling tools.
Whipstock Depth
The measured depth to the whipstock. Used for the purpose of sidetracking or directional drilling.
Wicker
A wire like piece of metal peeled from a thread or chamfer surface, and which may be attached to the machined surface at one end. Also referred to as: Whisker.
Wild Well
A well flowing out of control.
Wildcat Well
A well drilled in an unproved area to test for a new field, a new pay, a deeper reservoir, or a shallower reservoir. A wildcat well is an exploratory well, but not all exploratory wells are wildcat wells.
Winch
A machine used for pulling or hoisting that does so by winding a cable around a spool.
Wind Direction
The direction, relative to true north, from which the wind is coming at the time the record is generated.
Wind Gust Speed
Maximum wind speed measured.
Wind Speed
The average wind speed measured.
Windlass
SEE: Winch.
Window
(1) A section of casing milled out to provide an opening to sidetrack or kick off.(2) The portion of a seismic data set chosen for consideration, such as designing operators to be used for autocorrelation or frequency analysis. Also referred to as Gate.
Wing Valve
A valve located on the Christmas Tree, but not in the vertical run, which can be used to shut off flow.
Wiper Pipe
A disc shaped device with a center hole used to wipe off mud, oil or other liquid from drill pipe or tubing as it is pulled out of a wellbore.
Wire Cloth
Screen cloth of woven wire.
Wire Rope
A flexible, multiwired member usually consisting of a core member around which a number of multiwired strands are laid or helically wound.
Wireline
A cable used to lower instruments into a wellbore for the purpose of wireline logging.
Wireline Cutting Tool
A special device, usually run on a solid wireline, that is used to cut another wireline that is stuck in a wellbore.
Wireline Log
A permanent record of one or more physical measurements as a function of depth along a wellbore path, as measured using instruments lowered into the wellbore on a logging cable. Wireline logs are used to identify and correlate underground rocks, and to determine the mineralogy and physical properties of potential reservoir rocks and the nature of the fluids they contain. The record consists of one or more curves, generally displayed as a function of measured depth. Measurement may be electrical, radioact
Wireline Operation
An operation performed in a wellbore by use of tools which are run and pulled on small diameter slick, braided, or electric wirelines.
Wireline Preventer
Installed on top of the well or drillstring as a precautionary measure while running wirelines. The preventer packing will close around the wireline.
Wireline Retrievable Mandrel
A tubular member with an internal receiver for a wireline retrievable gas lift valve. The mandrel becomes an integral part of the tubing string.
Wireline Retrievable Valve
A gas lift valve mounted inside the tubing that can be installed and recovered by solid wireline operations without disturbing the tubing.
Wireline Spear
A special fishing tool fitted with prongs to catch and recover wireline that has been broken and left in a wellbore.
Wireline Test Date
Date the wireline test was performed.
Wireline Test Type Code
An indicator of the type of test performed in a wellbore by wireline tool; e.g., pressure sond, flow turbine meter, sidewall core.
Wireline Tool
Special equipment made to be lowered into and retrieved from the wellbore on a wireline, small diameter steel cable; e.g., packers; swabs; gas lift valves; measuring devices.
Wireline Truck
A service vehicle or unit on which the spool of wireline is mounted for use in downhole wireline work. Also referred to as: Wireline Unit.
Wireline Unit
Unit equipped with special tools to be lowered into the well's wellbore on a wireline (small diameter steel cable); e.g., logging tools, packers, swabs, measuring devices, etc.
Wireline Wiper
A flexible, rubber device used to wipe off mud, oil, or other liquid from a wire line as it is pulled out of a wellbore.
Wireline Work Area
An area in which wireline work is being performed on a wellbore through a lubricator.
Witness Name
The name of the person attesting to the accuracy of the submitted activity.
Woodpecker Drill Collar
SEE: Drill Collar Type.
Work Boat
A boat or self propelled barge used to carry supplies, tools, and equipment to a job site offshore.
Working Barrel
The outer shell of a downhole plunger pump run on tubing to receive the travelling valve.
Working Interest
The rights granted to the lessee of a property to explore for, and produce and own, oil, gas, or other minerals. The working interest owners bear the exploration, development, and operating costs on either a cash, penalty, or carried basis. The term normally implies gross working interest unless the word net appears before the words working interest.
Working Interest After Payout Amount
The interest of a working interest owner after the payout has occurred. In this situation the owner has either elected to go noninterest in a property or to farm out the acreage in a property. Once the property has paid out (the expenses recovered from the revenue), the owner's interest is automatically reinstated or the owner has the option to convert an overriding royalty interest to a working interest.
Working Interest Area
An area established for the exploration or development and/or operation of oil and gas properties by pooling of only the working interests in various tracts of land, and the company owns no record ownership in the interest contributed by other parties.
Working Interest Owner Name
The name of an owner who is obligated to pay proportional costs in return for some percentage of production or revenue.
Working Interest Owner Percentage
The owner's working interest percent fraction of interest in a lease. This percent designates that owner's specific distribution of proceeds from the lease.
Working Interest Ownership Type Code
Used to classify each type of working interest ownership into categories based on the nature of the working interest ownership. Used to distinguish between the basic 8/8 working interest ownership as documented in the operating agreement and other working interest ownerships established for billing purposes. Examples are: Basic operating agreement 8/8 working interest; Nonconsent well (company consenting party); Nonconsent well (company nonconsenting party); Investment only.
Working Interest Percentage
The taxable working interest percentage of gas not run through processing plant.
Working Interest Reserves Type
Used to classify each type of working interest reserves into categories based on the nature of the working interest ownership. Used to distinguish between the basic 8/8 working interest ownership as documented in the operating agreement and other working interest ownerships established for billing purposes. Examples are: Basic operating agreement 8/8 working interest; Nonconsent well (company consenting party); Nonconsent well (company nonconsenting party); Investment only.
Working Pressure Measurement
The pressure at which an item of equipment normally operates.
Workover
Work performed on a well to sustain or increase production or injection which may physically change the downhole condition of the well. Operations include casing repairs, acidizing, fracture stimulation, perforating, deepening or plugging back to a different zone in the same horizon, sidetracking or whipstocking around junk due to obstructions, running liners, and gravel packing.
Workover Fluid Type Code
An indicator of the type of fluid used in the workover operation of a well.
Workover Fluid Weight
The density of the workover fluid.
Workover Type
The type of workover or stimulation treatment performed on a borehole or well completion.
Wrench Tight
When thread protector is tightened by hand using strap wrench, pipe wrench or thread protector wrench; i.e., 30-100 foot-pounds torque.
Written Notice Required Flag
An indicator of whether the contract specifies that written notice is required by a party electing to cancel the contract.
Wrought Product
A product shaped by means of forging.
Wrought Structure
A forged product that contains no cast mineral crystallization.
Wye Section
The wye section is that piping section where the loop joins the vertical tubing bore.
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