E

Fabrication Weld
A weld joining two or more parts.

Facility
An installation consisting of equipment, machinery, vessels, buildings, or other physical assets constructed, assembled, and/or otherwise acquired or designated for a specific purpose.

Facility Identifier
The number or code assigned to a facility by the regulatory agency.

Facility Measurement Point
(1) A facility that sells, stores, or transfers production prior to or at the point of royalty determination. (2) A metering point where production is measured for sales, transfers, and/or royalty determination.(3) Also referred to as: FMP.

Facility Measurement Point Code
The Federal agency code assigned to a Facility/Measurement Point. Commonly abbreviated: FMP.

Facility Measurement Point Name
The official Federal agency name assigned to a Facility/Measurement Point, commonly abbreviated: FMP.

Facility Measurement Point Number
The official Federal agency number assigned to a Facility/Measurement Point, commonly abbreviated: FMP.

Facility Name
The name used to identify the facility.

Facility Reference Point
A describable point situated on or in a facility. Ideally it should be a permanent feature which shall exist for the lifetime of the facility.

Facility Type Code
An indicator of a classification of a facility entity according to its physical equipment or principal service performed.

Factory Seal
A seal provided in an explosion proof device during manufacture for the purpose of eliminating external, field installed conduit seals for that device.

Fail Safe
Equipment or a system so constructed that, in the event of failure or malfunction of any part of the system, devices are automatically activated to stabilize or secure the safety of the operation.

Fail Safe Device
A device, which upon loss of the control medium, automatically shifts to the safe position.

Failed Casing Depth
The measured depth at which the casing failure occurred.

Failure
(1) Drilling a dry hole. Probability of failure is one minus the probability of success. In some analyses, drilling a dry hole is not the only condition defining a failure case.(2) Improper performance of a device or equipment item that prevents completion of its design function.(3) Any condition of a valve system that prevents the valve from performing its design function for wellbore or surface control; i.e., inability to close due to breakage, erosion, corrosion, or fouling.

Fairlead
A device to guide wire rope for proper spooling.

False Easting
A value added to the Easting value of a projection coordinate system to eliminate negative numbers. A translation of the Easting axis.

False Indication
An indication that may be interpreted erroneously as a defect or imperfection. An irrelevant indication. Also referred to as: Artifact.

False Northing
A value added to the Northing value of a projection coordinate system to eliminate negative numbers. A translation of the Northing axis.

False Set
An abnormal early thickening of cement slurry wherein the slurry remains pumpable for the usual thickening time. The thickening may be reversible during the pumping history of the slurry.

False Starting Thread
A circumferential tool mark on a round thread chamfer that precedes the actual starting thread. Sometimes referred to as a double starting thread.

Fan Cooler
A heat exchanger employing a fan to move air across a coil and thereby remove heat from a fluid in the coil.

Far Field
The region beyond the near field in which intervals of high and low acoustic transmission intensity cease to occur.

Farm-in
To execute a Farm-In Agreement.

Farm-in Agreement
A Farm-Out Agreement, but viewed from the standpoint of the farmee rather than from that of the farmor.

Farm-in Agreement Number
The reference number assigned to a Farm-in Agreement for identification purposes.

Farm-out
To execute a farm-out agreement.

Farm-out Agreement
A pact between operators whereby a working interest owner of a lease agrees to assign his interest or a portion of it to another operator who wishes to drill on the lease. The assignor (the farmor) may or may not retain an interest (royalty or production payment) in the production

Farm-out Agreement Number
The number assigned to a Farm-out Agreement for identification purposes.

Farm-out Name
The name applied to a leasehold held under a farm-out agreement.

Farm-out Well
Well drilled by outside parties in which the designated company neither acquired nor retained a working interest: (1) Toward which the company made: (a) Dry or bottomhole cash contributions; (b) Acreage contributions; (c) Contributions of assets other than cash or acreage; (d) Combinations of (a), (b), or (c). (2) Under dry hole contracts where no money was paid by the company because the well was completed as a producer. A test well in which the company retained or acquired an economic interest othe

Farmee
The party to whom a transfer in acreage under a farm out agreement has been made; i.e., the recipient of the acreage.

Farmor
The party who transfers acreage to another under a farm out agreement.

Fast Ice
Any type of sea ice that remains attached to a shoreline, island, or grounded ice features.

Fast Ice Zone
Any type of sea ice that remains attached to a shoreline or grounded. Also referred to as: Landfast.

Fast Line
The end of the hoisting (drilling) line which is affixed to the drum or reel.

Fatigue
Failure of a metal or equipment under repeated loading and stress.

Fatigue Life
Number of cycles a metal can endure at a given stress level before failure will occur.

Fault
A fracture or zone of fractures along which there has been displacement of the sides relative to one another parallel to the fracture.

Fault Cut
SEE: Fault Vertical Separation.

Fault Dip
The dip angle of the fault.

Fault Heave
Heave is the horizontal component of dip slip, measured in the vertical cross section perpendicular to the fault strike.

Fault Name
The name of the fault.

Fault Strike Azimuth Measurement
The strike azimuth of the fault plane.

Fault Throw
The vertical component of dip slip. It is the difference in vertical depth between the fault intersection with a line or plane (such as a formation top) in one fault block and the fault intersection with the same line or plane in the opposing fault block, measured in the vertical cross section perpendicular to the strike of the fault.

Fault Type Code
An indicator of the type of fault; e.g., normal; reverse; strike slip; thrust.

Fault Vertical Displacement
SEE: Fault Vertical Separation.

Fault Vertical Separation
The vertical component of bed displacement. It is the distance the rock column is displaced vertically as a result of fault block movement. It is also the vertical thickness of stratigraphic section missing or repeated in the wellbore as a result of fault intersection. Also referred to as Fault Cut, or Fault Vertical Displacement.

Fault Zone
A fault, instead of being a single clean fracture, may be a zone hundreds or thousands of meters wide. The fault zone consists of numerous interlocking small fractures, or a confused zone of gouge, breccia or mylonite.

Faunal Assemblage
SEE: Fossil Assemblage.

Fcf
SEE: Fisherman's Contingency Fund.

Featheredge
A thin sharp crested portion of a thread normally formed when the starting thread on round or buttress (pipe threads) runs out to the face of the pipe and not on the chamfer.

Federal 8g Acreage
Acreage under the jurisdiction of the United States government within three nautical miles of the seaward boundary of any coastal state.

Federal Area
Areas under the sovereignty and/or jurisdiction of the United States government; e.g., Federal; Indian.

Federal Chargeable Acres
Federal regulations limit the total area which a company can hold in certain types of U.S. government leases at any one time in any one state. This is the area under a given land property that is chargeable to this Federal limit for that state.

Federal Chargeable Flag
An indicator of whether or not a government lease is chargable against the maximum acreage limitation; i.e., Federal chargeable acres.

Federal Energy Regulatory Commission
An agency of the U.S. Federal Government that is responsible for the regulation of energy policies. Commonly abbreviated as FERC.

Federal Exempt Volume
The Federal government's royalty interest share of volume produced from a lease. Its value is exempt from taxes.

Federal Indian Code
An indicator of whether the property is a Federal or Indian Lease.

Federal Or Indian Royalty In Kind Interest
The royalty expressed as interest if the Federal or Indian lease takes its royalty in kind for the identified property.

Federal Report Of Operations Id
An identifier that uniquely identifies the report requirement of the Federal agency involved. The identifier is assigned by the Federal agency or the company. Types of identifiers are: communitization agreement number; government lease number; unit agreement/participation area name.

Federal Royalty Exempt Amount
The monetary amount exempt from taxation that relates to a federal royalty exemption.

Federal Royalty Rate Code
The indicator for the type of royalty rate applicable to a Federal property.

Federal Source Of Revenue Number
Number assigned by the Mineral Management Service (MMS) which further identifies a lease sub-account; e.g., unitized production allocation; communitized production allocation; single well; group of wells; all wells on a lease.

Federal Tax Id Number
A unique number used to identify an individual or corporation for reporting payee revenues to the Federal government.

Fee
The title or ownership of land. The owner of the fee holds title to the land.

Fee Acres
Acreage on which the landowner has ownership in both surface and mineral rights. The owner of the fee holds title to the land.

Fee Interest
An economic interest, either decimal or percent of the fee acreage, representing the landowner`s title to income.

Fee Property Net Surface Acres
The actual net acres of the surface owned in a fee type property.

Fee Royalty
(1) The lessor's share of mineral production.(2) The landowner's royalty.

Feed Capacity
The maximum feed rate that a solids separation device can effectively handle, dependent upon particle size, particle concentration, viscosity, and other variables.

Feed Chamber
That part of a device which receives the mixture of diluents, mud, and solids to be separated.

Feed Header
A pipe, tube, or conduit to which two or more hydrocyclones are connected and from which they receive their feed slurry.

Feed Manifold
An arrangement by which liquids, solids, or slurries from one or more sources can be fed to one or more solids separation devices.

Feed Opening
SEE: Inlet.

Feed Pressure
The actual gauge pressure measured as near as possible to, and upstream of, the inlet of a device.

Feed Slurry
A mixture of solids and liquid entering a liquid solids separation machine, including dilution liquid if used.

Feed Water
Water introduced into a system to replace an outgoing stream, such as water fed to an operating boiler.

Feet Of Lateral Distance
The measured distance of the lateral from the point of entry of the specified interval to the endpoint or terminus of the lateral in said interval.

Female Connection
A pipe or rod coupling with the threads on the inside.

Ferc Gathering Allowable Permit Flag
An indicator of whether or not a Federal Energy Regulatory Commission (FERC) gathering allowance is to be included in determining the applicable gas price.

Ferc Out
Provision in gas purchase contracts that allows the purchaser to reduce the price paid to the producer by an amount which the Federal Energy Regulatory Commission (FERC) did not allow in the purchaser's rate base for ultimate pass through to the purchaser's customer.

Fermentation
Decomposition process of certain organic substances; i.e., starch in which a chemical change is brought about by enzymes, bacteria, or other microorganisms. Also referred to as Souring.

Ferromagnetic
A term applied to magnetic materials that can be magnetized or strongly attracted by a magnetic field.

Fibrous Material
Any tough stringy material used to prevent loss of circulation or to restore circulation. In field use, fiber generally refers to the larger fibers of plant origin.

Field
An area consisting of a single reservoir or multiple reservoirs all grouped on, or related to, the same individual geological structural feature and/or stratigraphic condition. The field name refers to the surface area, although at times it may refer to both the surface and the underground productive zones.

Field Acquisition End Date
The ending date of field acquisition operations, at which time data samples are collected or observations recorded.

Field Acquisition Start Date
The starting date of field acquisition operations, at which time data samples are collected or observations recorded.

Field Annual Gas Production Volume
The total quantity of gas produced in the last 12 months.

Field Annual Oil Production Volume
The total quantity of oil produced from a field in the last 12 months.

Field Discovery
SEE: Discovery Well.

Field Discovery Date
Date the field was discovered, as shown by publications/reports issued or accepted by the governing regulatory body.

Field End
The pipe end opposite the coupling or box.

Field Environment
Specifies the type of field environment in which seismic surveys are acquired.

Field Estimated Cumulative Cost
Total dollar amount for expenses incurred relating to a specific work activity derived by summing field estimated daily costs.

Field Estimated Daily Cost
Total dollar amount obtained by adding together service company work tickets received by workover foreman on a given day for a specific work activity.

Field Estimated Job Cost
Total dollar amount for expenses incurred relating to a specific job within a work activity. Cost figure derived from service company work tickets received by workover foreman. Expenses include indirect costs such as enlarging a location in order to accommodate frac tanks as well as those directly associated to the job.

Field Facility
An installation designed for one or more specific field processing units scrubbers, absorbers, drip points, compressors, single or multiple stage separation units, low temperature separators, and other types of separation and recovery equipment.

Field Gas Facility
SEE: Central Facility.

Field Name Code
An indicator of the name of the field in which the well is located. This name may be company specific or regulatory.

Field Office
Those offices, other than the operator's major administrative offices, at which are located the operator's personnel.

Field Operations Gas Volume
The volume of gas used in lease fuel operations.

Field Operations Oil Volume
The volume of oil and or condensate used in lease fuel operations.

Field Print
A preliminary print of the well log presented at the wellsite at the completion of the well survey activity.

Field Producing Completions Count
The number of producing completions in a field.

Field Remaining Gas Reserves Volume
The quantity of gas that remains to be produced from a field.

Field Remaining Oil Reserves Volume
The quantity of liquid hydrocarbons that remains to be produced.

Field Repair
An activity involving disassembly, reassembly and functional testing of equipment with or without the replacement of qualified parts. Field repair does not include machining, welding, heat treat or other manufacturing operations. Redress or adjustment does not constitute field repair. Field repair can also be accomplished at an Authorized Facility.

Field Seismic
SEE: Seismic Acquisition.

Field Statics
Static corrections applied to seismic traces to account for differences in elevations of sources and receivers and near surface velocity variations. A near surface velocity model is generally necessary to convert the elevation differences to time shifts.

Field Status Code
An indicator of the classification of fields other than normal active fields as to activity status with respect to the company's interest; e.g., inactive; temporary abandoned.

Field Total Completions Count
The total number of completions in a field.

Field Use Volume
The volume of product used in the field for fuel, lift, etc.

Filing Date
The date a form is to be or was filed with a regulatory agency.

Filing Purpose Code
An indication of the reason a document is submitted.

Filling The Hole
Pumping drilling fluid into the wellbore to keep it filled, for example, while downhole equipment is being withdrawn.

Fillup Area
The area of the reservoir that is to be influenced by the injection operation.

Fillup Line
A line usually connected into the bell nipple above the blowout preventers to allow adding drilling fluid to the wellbore while pulling out of the wellbore to compensate for the metal volume displacement of the drillstring being removed.

Filming Amine
An amine which forms an impervious nonwettable film on metal surfaces that excludes carbon dioxide and oxygen and thus prevents corrosion in a steam or condensate system.

Filter
(1) A part of a system that discriminates against some information entering it (usually on the basis of frequency, wavelength, moveout, coherence or amplitude).

Filter Cake
The suspended solids that are deposited on a porous medium during the process of filtration.

Filter Cake Texture
The physical properties of a cake as measured by toughness, slickness, and brittleness.

Filter Loss
SEE: Filtrate Volume.

Filter Paper
Porous unsized paper for filtering liquids. API filtration test specifies one thickness of 9-cm filter paper Whatman No. 50, S&S No. 576, or equivalent.

Filter Press
(1) Device for determining the fluid loss of a drilling fluid or cement system having specifications in accordance with API Spec 10 or RP 13B.(2) A porous medium through which fluid is forced under pressures described in API Spec 10 or RP 13B to separate the fluid from material held in suspension.

Filter Response
The amplitude gain and phase shift characteristics of a linear filter as a function of frequency. The response of a filter is designated by specifying the frequencies at which the amplitude is down by 3dB and by the slope of the cutoff. Thus, 14/18-56/36 specifies a lowcut filter down by 3dB at 14 Hz with an 18dB/ octave slope and a highcut filter down 3dB at 56 Hz with a 36 dB/octave slope.

Filter Slope
In seismic, the reduction/increase rate in amplitude or energy caused by the physical characteristics of a filter. The slope is measured in units of decibels per octave, dB/octave.

Filter Type
The type of filter used for processing seismic or logging curves, or other series data; e.g., box car; binomial; truncated binomial; exponential; Ormsby; Butterworth; Ricker; deconvolution; adaptive.

Filtrate
The liquid that is forced through a porous medium during the filtration process.

Filtrate Resistivity
SEE: Drilling Fluid Filtrate Resistivity.

Filtrate Resistivity Temperature
SEE: Drilling Fluid Filtrate Resistivity Temperature.

Filtrate Volume
Measure of the volume of fluid lost through filter media (usually filter paper) when drilling fluid is subjected to a differential pressure in accordance with the filtration procedure contained in API RP 13B.

Filtration
The process of separating suspended solids from their liquid by forcing the latter through a porous medium. Two types of fluid filtration occur in a well: dynamic filtration while circulating and static filtration while at rest.

Filtration Quality
The filtration characteristics of a drilling fluid. Generally these qualities are inverse to the thickness of the filter cake deposited on the face of a porous medium and the amount of filtrate allowed to escape from the drilling fluid into or through the medium.

Filtration Rate
SEE: Filtrate Volume.

Fin
A thin, long ridge of metal protruding above a chamfer surface or thread profile.

Final Angle
Final deviation of the wellbore path from true vertical below the drop off point in an s-type well.

Final Cement Set
Cement shall be considered to have acquired its final set when it will bear, without appreciable identation, the final Gillmore needle.

Final Cement Strength
The strength of a cement at such a time when under the given conditions of temperature and pressure it ceases to change significantly. Also referred to as: Ultimate Strength.

Final First Flowing Pressure Measurement
The final flowing pressure measurement recorded for the well test flowing phase having a well test phase sequential discriminator indicating the phase is the first of multiple well test flowing phases.

Final Flowing Pressure
The last flowing pressure measurement recorded during a well test flowing phase.

Final Flowing Tubing Pressure Measurement
The final flowing pressure measurement recorded in the tubing during a well test flowing phase.

Final Hydrostatic Pressure Measurement
The first hydrostatic pressure measurement recorded during the well test removal phase.

Final Log Print
A print generally supplied as the permanent well log record.

Final Maximum Shut- In Pressure Measurement
The maximum pressure measured after the well had been shut- in for the final time during the drillstem test.

Final Modified Lahee Class
The final modified well classification, according to the Lahee well classification system.

Final Open Final Measurement
The final flowing pressure measurement recorded for the well test flowing phase having a well test phase sequential discriminator indicating the phase is the last of multiple well test flowing phases.

Final Open Initial Pressure Measurement
The initial flowing pressure measurement recorded for the well test flowing phase having a well test phase sequential discriminator indicating the phase is the last of multiple well test flowing phases.

Final Open Time
The time stamp recorded at the end of a well test flowing phase.

Final Open Time Interval
The time interval recorded for the well test flowing phase having a well test phase sequential discriminator indicating the phase is the last of multiple well test flowing phases.

Final Return Flag
An indicator of whether this is the final return.

Final Second Flowing Pressure Measurement
The final flowing pressure measurement recorded for the well test flowing phase having a well test phase sequential discriminator indicating the phase is the second of multiple well test flowing phases.

Final Shut- In Pressure Measurement
The last shut in pressure measurement recorded during well test shut- in phase.

Final Shut- In Pressure Time
The time stamp at the recording of a final shut- in pressure measurement.

Final Shut- In Time
The time stamp recorded at the end of a well test shut-in phase.

Final Shut- In Time Interval
The shut- in time interval recorded for the well test shut in phase having a well test phase sequential discriminator indicating the phase is the last of multiple well test shut- in phases.

Final Shut-in Tubing Pressure Measurement
The final shut-in pressure measurement recorded in the tubing during a well test shut- in phase.

Final Squeeze Pressure
The pressure at the well completion of a squeeze cementing operation. Usually refers to the pressure at the surface.

Final Static Reservoir Pressure
The last static reservoir pressure measurement recorded during the well test static reservoir pressure phase.

Final Time Formation Open
SEE: Final Open Time Interval.

Final Well Class
The final well classification, according to a well classification system.

Financial Accounting Standards Board
A body recognized pursuant to rule 203 of the Rules of Conduct of the American Institute of Certified Public Accountants (AICPA) to formulate and constitute accounting principles.

Financial Book Tax
The tax liability which arises on a firm's financial books, as opposed to on its tax books. A timing difference may lead to deferred taxes.

Fine Screen Shaker
A vibrating screen designed for screening drilling fluids through screen cloth finer than 30 mesh.

Fineness
The particle size to which a cement clinker is ground. This value is generally reported as surface area as determined with the Blaine air permeability apparatus or Wagner turbidimeter. See American Society for Testing and Materials (ASTM) C 204 and C 115.

Finger Board
A board located up in the derrick to support the upper end of stands of pipe standing on the derrick floor.

Finger Rafting
Rafted ice in which two sheets alternately override each other along their common boundary. Predominant feature for thin ice sheets, but can be identified with most first year compression ridges.

Fire
The phenomenon of combustion manifested in light, flame and heat.

Fire Loop
A pneumatic control line containing temperature sensing elements; e.g., fusible plugs; synthetic tubing; which, when activated, will initiate platform shutdown.

Fire Wall
(1) A dike built around oil tanks, oil pumps and other oil handling equipment to contain any oil which may be accidentally discharged from the equipment. It also serves to block the spread of a fire or give protection for a period of time while emergency action is taken.(2) A partition fabricated from noncombustible materials to prevent the spreading of flames and to provide a heat shield.

Firebox
A complete assembly consisting of the firetube, mounting flange, intake and stack adaptors.

Fired Process Area
That area in which a fired vessel is located.

Fired Vessel
A vessel in which the temperature of a fluid is increased by the addition of heat supplied by an indirect flame.

Firetube
Natural gas is normally used to fire the heater through a submerged furnace chamber called the firetube. The firetube normally consists of one or more U-tubes fired at one end and exhausting through a vertical stack for each U-tube. In larger heaters the firetube may consist of a large diameter first pass firetube and multiple return tubes manifolded into a common stack. The firetube is that portion of the firebox in contact with the heater bath.

Firm Transportation
Transportation services for which facilities have been designed, installed, and dedicated to a certified quantity. Firm transportation service takes priority over interruptible service.

First Delivery Date
For oil, the day on which liquid hydrocarbons are first sold or shipped from a temporary storage facility or are first produced into a permanent storage facility, whichever occurs first. For gas, the day on which gas is first measured through a sales metering facility or the date on which associated liquid hydrocarbons are first sold or shipped from a temporary storage facility, whichever comes first.

First Drop Over
The temperature at which the first drop falls from the tip of the condenser tube in a distillation; e.g., ASTM; Engler.

First Level Supervisor
An employee whose primary function is the direct supervision of other employees and/or contract labor directly employed in a field operating capacity.

First Nearby Month
SEE: Spot Month.

First Production Date
The date indicating the start of recovery of products from the subsurface for the identified entity; e.g., reservoir, well, lease.

First Rental Date
Date that first delay rental payment on a mineral lease is due.

First Sale Of Natural Gas
Any sale of natural gas to any interstate pipeline or intrastate pipeline to any local distribution company or to any person for use by such person. Federal Enery Regulatory Commission)

First Sale Of Ngl Or Nglp
The Economic Regulatory Administration (ERA) defines as the first transfer for value to a class of purchaser for which a fixed price per unit of volume is determined.

First Sales Date
The date on which first sale of a product from a well, lease or facility occurred.

First Year Ice
Sea ice that is less than one year old. Typically, first year ice has a salinity of 4 to 6 ppt. However, fresh water ice may be found near some river deltas.

First Year Ridge
A linear ice feature created by motion interference between two ice sheets. Usually a result of higher ice movement rates than for the formation of rafted ice.

Fish
A name given to any item lost in a wellbore.

Fisherman's Contingency Fund
A fund set up by the Outer Continental Shelf (OCS) Lands Act, as amended, to compensate commercial fishermen for economic losses attributable to oil and gas development in Federal waters. Commonly referred to as: FCF.

Fisherman's Contingency Fund Incident
An occurrence in Outer Continental Shelf (OCS) Federal waters, where a fisherman claims a loss or damage to equipment as a result of underwater hazards created by oil and gas operations; e.g., lease operators; pipeline companies. If a liability is incurred, settlements are made through the Fisherman's Contingency Fund (FCF).

Fishing
A well activity requiring special tools and a considerable degree of skill, with the objective of recovering tools, casing or other items lost or stuck in a wellbore.

Fishing Neck
A groove in the top of many wireline tools to allow other tools to clamp the tool and remove it from the wellbore.

Fishing Tool
A tool designed to recover equipment that is lost or left in the wellbore.

Fitness For Purpose
The manufacture or fabrication of an assembly or component to the quality level required (but not necessarily the highest level attainable) to assure material properties, environmental interactions, and any imperfections present in the assembly or connection are compatible with the intended purpose. Fitness for purpose connotes an assembly or component may contain material or fabrication imperfections of sizeable dimensions but their presence has no influence on its performance or reliability.

Fitting
A small pipe, nipple, coupling, elbow, union, tee, swage, etc., used to make up a system of piping.

Five Spot
Four injection wells located in a square pattern with the production well in the center.

Fixed Minimum Maximum Price
The minimum or maximum price to be used in lieu of the base price. Subject to minimum or maximum code will determine whether it is a minimum or a maximum price.

Fixed Offshore Platform
A platform extending above and supported by the sea bed by means of piling, spread footings or other means with the intended purpose of remaining stationary over an extended period.

Fixed Platform
SEE: Platform; Fixed Offshore Platform; Tension Leg Platform.

Fixed Price Adjustment Month
Identifies the month of the year the fixed price is to be updated. This price increase will normally be specified in the contract and will occur at a fixed interval.

Fixed Price Adjustment Rate
A rate to adjust the content value. Can either be a percentage of the price or a percentage of value adjustment.

Fixed Price Volume Unit Of Measurement Code
Identifies the units on which the volume for the fixed price is based; e.g., mcf/d; mmBTU/d.

Fixed Rate Royalty
Royalty calculated on the basis of a fixed rate per unit of production, without regard to the actual proceeds received from the sale of such production.

Fixed/floating Swap
Provision for one party to pay a fixed price stream (typically the NYMEX price for one or more future months at the time the swap is entered into) and receive a floating or to-be-determined price stream (typically the average settlement price of the last three trading days for one or more months' futures contracts).

Flag
(1) A piece of cloth, rope, or nylon strand used to mark a stranded wire line when swabbing, bailing, etc.(2) A code used to indicate yes or no.

Flame Arrestor
A device which prevents the propagation of flame from an enclosed area which contains the burner. If the area outside the enclosure were to contain an ignitible mixture, flashback would thus be prevented. The flame arrestor must be able to accomplish this without stopping the communication of air between the two areas.

Flame Arrestor Element
A device which is mounted in a housing that serves as the combustion air intake. Its function is to prevent propagation of the flame from the firebox to the outside atmosphere. Sustained exposure to direct flame impingement may render the element inoperative. Also referred to as: Flame Cell.

Flame Arrestor Housing
An enclosure which contains the flame arrestor element and may contain mechanical devices; e.g., mixer; air controller. It bolts to the breeching.

Flame Failure
A flame which is inadequate to instantaneously ignite combustible vapors entering the firing chamber.

Flammable
Capable of igniting easily, burning intensely or having a rapid rate of flame spread.

Flammable Highly Volatile Liquid
SEE: Highly Volatile Liquid.

Flammable Limit
The lower and upper percentages by volume of concentration of gas in a gas and air mixture that will form an ignitible mixture.

Flammable Liquid
Any liquid having a flashpoint below 100 F (37.8 C).

Flange
A protruding rim with holes to accept bolts and having a sealing mechanism used to join pressure containing equipment.

Flange Point
A point of contact between rope and drum flange where the rope changes layers.

Flange Tap
Tap holes in which the upstream tap is 1 inch from the upstream face of the plate and the downstream tap is 1 inch from the downstream face.

Flange Union
A fitting consisting of a pair of threaded plates and bolts to connect threaded pipe.

Flank Angle
The angle of the individual flanks.

Flare
Gaseous hydrocarbons discharged from a safety relief valve during production or processing operations.

Flare System
A system for discharging gas through a control valve from a pressurized system to the atmosphere during normal operations. This discharge may be either continuous or intermittent, and may or may not be ignited.

Flared Gas
Gas vented or released into the atmosphere.

Flared Gas Nonexempt Tax Volume
The flared volume in excess of allowances.

Flared Gas Tax Exempt Volume
The volume of flared gas exempt from taxation.

Flash
Excess metal squeezed out between forging die faces.

Flash Cement Set
Flash set is abnormal early thickening or setting of cement slurry wherein the cement slurry becomes unpumpable.

Flash Drum
SEE: Drum.

Flash Gas
A gas that is liberated from solution in oil as a result of increasing the space occupied, increasing the temperature, and/or decreasing the pressure.

Flash Gas Gravity
Gravity of the gas evolved from the fluid sample at the given temperature and pressure.

Flash Gas Liberation
A process whereby gas is liberated from solution in the oil by increasing the space occupied by the gas and oil. The mass and composition of the system remain constant.

Flash Liberation
A pressure-volume-temperature (PVT) test performed on reservoir fluids in which the initial composition is the reservoir composition and fluid behavior is measured as the conditions are varied.

Flash Phase
The phase of the hydrocarbon sample prior to flashing; e.g., liquid; gas.

Flash Point
The minimum temperature at which a product momentarily ignites, but does not burn continuously.

Flash Pressure Measurement
Pressure at which the gas and liquid phase properties were measured.

Flash Relative Volume
Volume of the liquid phase of the fluid sample remaining at the given temperature and pressure relative to the volume at saturation pressure.

Flash Separator
SEE: Flash Tank.

Flash Separator Gas Oil Ratio
SEE: Flash Tank Gas Oil Ratio.

Flash Tank
A vessel in which volatile components of a liquid are vaporized by decreasing pressure and/or by increasing temperature.

Flash Tank Gas Oil Ratio
Standard volume of gas per unit volume of oil at the given temperature and atmospheric pressure.

Flash Temperature
Temperature at which the gas and liquid phase properties were measured.

Flat Bottom Bit
A bit which produces a nearly plane surface when drilling, usually a four cone bit.

Flat Face Flange
A type of flange having a flat mating surface.

Flat Gel
A condition wherein the 10 minute gel strength is substantially equal to the initial gel strength.

Flat Pricing
Pricing directly from the posting, without reference to gravity. None

Flat Rate Overhead
A fixed dollar amount charged to a joint interest account to cover all administrative overhead costs. This is a provision that can be made in the operating agreement.

Flex Element
Any of a variety of devices that permit relative angular movement of the riser or tendon in order to reduce bending stresses caused by vessel motions and environmental forces.

Flexure
SEE: Monocline.

Flight
On a decanting centrifuge, one full turn of a spiral helix, such as a flute or blade of a screw type conveyor.

Flipped
When the opposite occurs of what is intended in a drilling fluid. In an invert water in oil emulsion, the emulsion is said to be flipped when the continuous and dispersed phases reverse.

Float
A hollow ball or cylinder which floats in a liquid and actuates a liquid level indicator or controller.

Float Collar
A collar inserted one or two joints above the bottom of the casing string, and which contains a check valve that permits fluid to pass downward through the casing but prevents it from passing upward. The float collar prevents the drilling mud from entering the casing while it is being lowered, thus allowing the casing to float during its descent, and decreasing the load upon the derrick. The float collar also prevents the back flow of cement during the cementing operation.

Float On The Line
A mode of operation where the pressure in a piece of equipment, such as an oil and gas separator, is regulated by the pressure of the system to which it is connected.

Float Separator
SEE: Auxiliary Transit Control.

Float Valve
(1) A valve which is operated by a float.(2) The valve in a float collar.

Floating Harness
A frame equipped with sheaves and connected to the boom by stationary ropes usually called pendants.

Floating Ice Platform
A floating mass of either man made or natural ice that is used as a working surface.

Floating Pad
The pad of any contact logging tool that does not make sufficiently good contact with the formation wall to record quality information.

Floc
SEE: Flocculate.

Flocculate
A group of aggregates or particles in suspension subject to being broken up by normal shaking and stirring and reforming on standing.

Flocculating Agent
Substances that bring about the thickening of the consistency of a drilling fluid; e.g., most electrolytes; some polysaccharides; certain natural or synthetic polymers. In Bingham plastic fluids, the yield point and gel strength increase.

Flocculation
(1) Loose association of particles in lightly bonded groups, nonparallel association of clay platelets. In concentrated suspensions, flocculation results in gelation; e.g., drilling fluids. In some drilling fluids, flocculation may be followed by irreversible precipitation of colloids and certain other substances from the fluid, e.g., red beds.(2) The coagulation, coalesence or aggregation of finely suspended particles.

Flocculent
Resembling wool especially in loose, fluffy organization.

Floe
A relatively flat areal ice feature surrounded by distinguishable boundaries. Sheet ice features separated by thermally induced or other ice motion. Also referred to as: Pan.

Flooding
(1) The drowning of a well by water. (2) A process by which oil is driven to the wellbore by either designed water injection or natural water influx.(3) The unstable operation of a packed column or bubble tower whereby the entire vessel or a section of it is full of liquid due to high liquid or gas loading. Pressure drop of the gas through the vessel under such conditions is excessive because of the high liquid head.

Floor Block And Pulley
An arrangement of equipment for routing or directing the wireline into the wellbore.

Floorman
Member of the rig crew whose work station during hoisting is on the rig floor. Also performs numerous other operating and maintenance duties as dircted by the supervisor. May also be referred to as rotary helper, roughneck, driller's helper, or well puller.

Flow Bean
The replaceable orifice part used in positive chokes to control flow rates.

Flow By Head
The intermittent flow from a well completion.

Flow Channel Length
The length of tubing or casing through which the gas is flowing.

Flow Chart
A record of the flow rate made by a recording meter.

Flow Coefficient
The calculation factor resulting from multiplying the differential pressure (inches H2O) and the meter pressure (psia), then taking the square root.

Flow Conditioner
A series of small tubes that are welded together and anchored into the meter tube to reduce turbulent gas flow.

Flow Coupling
A heavy walled nipple, designed to resist erosion that can result from turbulence created by a restriction in the flow string.

Flow Line Segment
Any portion of a flow line that has an operating pressure different from another portion of the same flow line.

Flow Measurement Computer
A computer capable of reading and computing a volume of gas or liquid passing through a point.

Flow Rate
The volume of fluid per unit time.

Flow Regime
The flow condition of a multiphase process stream; e.g., slug; mist; stratified flow.

Flow Size
The size of the flow line expressed as the size of the orifice times the diameter of the prover line.

Flow Splitter
A device dividing and directing flow streams to specialized process areas by stringent means of control.

Flow Stream Sample
Small quantity of fluid taken from the production lines to wellhead connections or from flow line, for an analysis of fluid composition.

Flow String
The string of casing or tubing through which produced fluids from a well completion flow to the surface.

Flow Tank
A lease tank to which produced oil is run after having gas or water removed. Also referred to as: Production Tank.

Flow Treater
A single unit which acts as an oil and gas separator, an oil heater, and an oil and water treater.

Flow Tube
The inner movable sleeve or tube in a subsurface safety valve (SSSV) through which well fluids must flow.

Flowing
The condition of being open to flow of fluids, whether flow is assisted or not.

Flowing Bottomhole Pressure Measurement
A flowing pressure measurement recorded for a specified depth.

Flowing Casing Pressure Measurement
The pressure measurement recorded for the space between the surface casing and the producing casing during a well test flowing phase.

Flowing Pressure Measurement
The pressure measurement recorded with the tubing or drillstem open and flowing fluids.

Flowing Temperature Measurement
The temperature of a flowing fluid over a given period of time.

Flowing Time Interval
The length of time the drillstem or tubing has been open or flowing since the previous pressure measurement.

Flowing Tubing Pressure Measurement
A flowing pressure measurement recorded for the tubing during a well test flowing phase.

Flowing Well
A well which produces or flows fluids naturally from one or more well completions without artificial aid.

Flowing Wellhead Pressure Measurement
A flowing pressure measurement recorded at the wellhead.

Flowline
The pipeline connecting a well with a tank battery.

Flowline Header
Common line at production facility into which flowlines from several wells may be connected to provide commingling of production through separation or treating equipment. May be connected to a second common line through a system of valves to provide individual well testing without interrupting normal production.

Flowmeter
A downhole tool used to measure the rate of flow and sometimes direction of flow of wellbore fluids. Usually these tools utilize impellers. During use the tools are run continuously with or against the direction of the fluid flow. Examples include: continuous flowmeter, fullbore spinner flowmeter, packer flowmeter, spinner survey, radioactive tracer log.

Fluid
A substance that flows and yields to any force tending to change its shape. Liquids and gases are fluids.

Fluid Component
Chemical constituents of a fluid used to characterize its composition and behavior; e.g., methane; isobutane; water; hydrogen sulfide; surfactant.

Fluid Component Liquid Density
The liquid density of the given fluid component.

Fluid Component Weight Fraction
The weight fraction of the named component in the fluid sample.

Fluid Composition
Specification of the fluid component and its proportions in a fluid.

Fluid Compressibility
Compressibility of a fluid sample at a specific temperature and pressure.

Fluid Contact
An interface between fluid bodies, such as an oil-water contact.

Fluid Density Used To Compute Porosity
Fluid density value used to compute porosity.

Fluid Differential Vaporization
Properties of the gas and liquid hydrocarbon phases of a fluid sample as a function of temperature and pressure (evolved gas is removed from the cell).

Fluid Differential Vaporization Pressure Measurement Pressure At Which The Given Measurements Were Made During A Differential Vaporization Analysis.

Fluid Differential Vaporization Temperature
Temperature at which the given measurements were made during a differential vaporization analysis.

Fluid Drive
Special pump and turbine unit connecting engine to load, permitting some slip and flexibility.

Fluid End
The portion of a fluid pump that contains the parts involved in moving the fluid.

Fluid Entry
The amount of fluid that entered a wellbore in a given period of time. This is usually measured in unit length from zero which is above a permanent datum point, to the top of the fluid level between swab runs, then calculataed into volume units of entry. Using feet and barrels as the units of measure, an example would be: 500 feet of fluid increase in 7 inch, 23# casing would calculate to 19.65 barrels of fluid entry into the wellbore.

Fluid Flow
The state of fluid dynamics of a fluid in motion is determined by the type of fluid (e.g., Newtonian; plastic; pseudoplastic; dilatant), the properties of the fluid (e.g., viscosity; density) the geometry of the system, and the velocity. Thus, under a given set of conditions and fluid properties, the fluid flow can be described as plug flow, laminar (called also Newtonian, streamline, parallel, or viscous) flow, or turbulent flow.

Fluid Inclusion
In a mineral, a tiny cavity 1 to 100 microns in diameter, containing liquid and/or gas, formed by the entrapment in crystal irregularities of fluid, commonly that from which the rock is crystallized.

Fluid Injection
Pumping fluid into a producing formation to increase or maintain reservoir pressure and, thus, production.

Fluid Level Above Pump
The level of fluid in a well as measured above the level of the pump.

Fluid Level Depth
Ordinarily the distance from the surface, wellhead, to the top of liquid in the wellbore. May be measured as either static or dynamic.

Fluid Loss
SEE: Drilling Fluid Loss.

Fluid Loss Control
A means by which the volume of filtrate lost to a permeable material is reduced.

Fluid Quantity Recovered
The amount of fluid recovered during a well test.

Fluid Sample
A small quantity of fluid extracted for analysis. The sample may be obtained directly from the reservoir rock during a well test or sampled from the production stream.

Fluid Sample Density
The density of the fluid sample at the given temperature and pressure.

Fluid Sample Depth
The depth to the wellbore point at which the fluid sample was collected.

Fluid Sample Expansion
The volume of liquid hydrocarbon dropout from a condensate as a function of temperature and pressure at constant composition (cell volume is varied).

Fluid Sample Pressure Measurement
The pressure at which the fluid sample was collected.

Fluid Sample Source
Description of the source of the fluid sample; e.g., bailer; extracted core; test trap.

Fluid Sample Type
The type of fluid sample; e.g., gas; oil; condensate.

Fluid Sample Viscosity
The viscosity of the fluid sample at the given temperature and pressure.

Fluid Sample Volume
The volume of the fluid sample recovered.

Fluid Sampler
A device used to recover accurately depth-controlled fluid samples of wellbore fluids from Pressure-Volume-Temperature (PVT) analysis.

Fluid Saturation Pressure Measurement
Saturation pressure of a fluid at a given temperature.

Fluid Separator Gas Analysis
Composition of gas sample from a gas and oil separator.

Fluid Separator Liquid Analysis
Composition of liquid sample from a gas and oil separator.

Fluid Separator Phase
The phase of the hydrocarbon sample prior to separating; e.g., liquid; gas.

Fluid Transfer System
System for transmitting fluid flow between the top of the risers to the platform mounted manifold. Jumper hoses or an articulated system of hard piping may be used to accommodate the relative motion between these points. Also referred to as: Jumper Hose.

Fluid Type Produced On Test
SEE: Fluid Sample Type.

Fluid Valve
A gas lift valve that utilizes the pressure in the production conduit as its primary operating medium.

Fluid Viscosity Density
Density of the fluid sample at specific temperature and pressure.

Fluidity
The reciprocal of viscosity. The measure of rate with which a fluid is continuously deformed by a shearing stress. Ease of flowing.

Flume
SEE: Boot.

Fluorescence
The glow and color of hydrocarbons under ultraviolet light, either on the rock or cuttings sample directly, or after carbon tetrachloride has been used to leach hydrocarbons from the sample. Salt water will also fluoresce but has a different glow.

Fluorescent Magnetic Particle Inspection
The magnetic particle inspection process employing a finely divided fluorescent ferromagnetic inspection medium that fluoresces when activated by ultraviolet light (3200 to 4000 angstrum).

Flush Production
The yield of a well completion during the early period of production, before the output has settled down to what may be regarded as usual for the reservoir in which the well was completed.

Flushed Zone
The interval at a relatively short radial distance into the the rock from the borehole wall, immediately behind the mud cake, which is considered to be penetrated and flushed by drilling fluid filtrate; i.e., is considered to have all mobile rock fluids displaced from it.

Flute
The curved metal blade wrapped around a shaft as on a screw conveyor.

Fluted Drill Collar
Drill collar with external deep grooves.

Flux Density
The strength of a magnetic field, expressed in flux lines per unit area; e.g., gauss; kilogauss.

Flux Leakage
This is the magnetic field forced out into the air by the distortion of the field within the pipe caused by the presence of a discontinuity.

Flux Line
An imaginary magnetic line used as a means of explaining the behavior of magnetic fields. Their conception is based on the pattern of lines produced when iron filings are sprinkled on a piece of paper laid over a magnet. Also referred to as: Magnetic Lines of Force.

Fly Ash
The finely divided residue that results from the combustion of ground or powdered coal in thermal generating plants and is transported from the firebox through the boiler by flue gases. It is an artificial pozzolan.

Fmp
SEE: Facility Measurement Point.

Foam
A foam is a two phase system, similar to an emulsion, where the dispersed phase is a gas or air.

Foaming Agent
A substance that produces fairly stable bubbles at the air liquid interface due to agitation, aeration, or ebullition. In air or gas drilling, foaming agents are added to turn water influx into aerated foam. This is commonly called mist drilling.

Foaming (boiler)
An undesirable condition, resulting from the formation of a substantial height of bubbles on the surface of the water in a boiler, causing appreciable entrainment of water with the steam. The principal factors causing foaming are concentration of dissolved solids at the steaming surface, presence of oil or grease, excessive alkalinity, and finely divided suspended solids.

Fob Point
Point at which title transfers from seller to buyer per contract.

Focused Beam
Converging energy of the sound beam at a specified distance.

Focused Transducer
A transducer with a concave face which converges the acoustic beam to a focal point or line at a definite distance from the face.

Fold
(1) Structural: A style of rock deformation resulting from a shortening of the crust by compressional forces. These compressional forces must be aligned perpendicular to the resulting fold axis.

Follow Up
Change in inclination angle and/or direction in addition to that obtained from the original tool run.

Following Flank
The opposite flank to the leading flank. Also referred to as: Back Flank.

Footwall
The portion of the fault block beneath the fault plane.

Force Majeure
As used in gas sales contracts, conditions which conceivably can occur but which are beyond the control or responsibilities of the parties to the contract.

Forging
(1) Plastically deforming metal, usually hot, into desired shapes with compressive force, with or without dies.(2) A shaped metal part formed by the forging method.

Form Generation Date
The date the original turnaround form was generated by a regulatory agency.

Formation
(1) Stratigraphic: A body of rock strata, of intermediate rank, in the hierarchy of lithostratigraphic units, which is unified with respect to adjacent strata by consisting dominantly of a certain lithologic type or combination of types or by possessing other unifying lithologic features. The formation is the fundamental unit of lithostratigraphic classification. A formation may be combined into geologic groups or subdivided into geologic members.(2) Drilling: A general term applied by drillers with

Formation Age
SEE: Geologic Age.

Formation Age At Total Depth
The geologic age of the formation or rocks at the wellbore bottomhole.

Formation Allocation Factor
The amount of hydrocarbon production assigned to a formation when the production from more than one formation in a borehole is commingled.

Formation Allocation Percentage
The percentage of a commingled stream allocated to a specified formation.

Formation At Total Depth
The name of the formation interpreted to be at the wellbore bottomhole.

Formation Base Depth
SEE: Geologic Marker Measured Base Depth

Formation Bottom Measured Depth
The measured depth to the bottom of a geologic formation in a borehole.

Formation Bottom True Vertical Depth
The depth to the base of a geologic formation imeasured from a surface reference point straight down to the base of the formation.

Formation Breakdown Pressure Measurement
The amount of pressure required at the wellhead to rupture the formation in a fracture treatment or squeeze job.

Formation Breakdown Rate
The rate at which fluid is pumped into the formation to achieve breakdown.

Formation Damage
The reduction of permeability in a reservoir rock arising from the invasion of drilling and treating fluid filtrate into the flushed zone.

Formation Density
The density (mass per unit volume) of rocks, measured in the subsurface usually during logging operations, pertaining to a particular formation.

Formation Description Code

Formation Description Code
SEE: Lithology Type Code.

Formation Factor Log
A well log in which the formation resistivity factor curve derived from a resistivity or porosity estimating device is recorded as a function of depth.

Formation Fluid Density
The density of the fluid recovered during the formation test.

Formation Fluid Flow Depth
(1) The measured depth at which the fluid flowed into the borehole.(2) The feet of drill pipe in the wellbore when the kick occurred. Also referred to as: Kick Depth.

Formation Fluid Recovery Volume
The volume of fluid recovered during the formation test.

Formation Gas
Gas initially produced from the reservoir in which it was formed.

Formation Integrity Test Value
The external force applied to the formation below the casing shoe (shoe test, leak off, etc.) to test the integrity of the cement job and the formation.

Formation Name
The name given to a rock strata or formation.

Formation Overlapped
The name of the formation overlapped by the formation test, other than the formation being tested.

Formation Overlapped By Core
The name of a second formation (not the primary formation) that was penetrated and extracted as a part of the core sample.

Formation Pressure Measurement
The pressure exerted by the fluids in a formation and recorded at the depth of the formation.

Formation Recovery Flow Rate
The amount of fluid recovered for a given period of time during the formation test. It consists of the amount, unit of measurement, and time period.

Formation Recovery Fluid Type
The basic type of fluid recovered during the formation test; e.g., brackish water; basic sediment and water; emulsion of oil and water; fresh water; shot gas; mud; gas; condensate; oil.

Formation Recovery Measuring Technique
The measuring technique used during the formation test flowing recovery; e.g., estimate; head; orifice meter; pits; metering separator; tank.

Formation Sensitivity
The tendency of certain producing formations to adversely react with invading mud filtrates.

Formation Test
SEE: Drillstem Test; Production Test; Potential Test.

Formation Test Cushion Type
The type of cushion material used for the formation test; e.g., carbon dioxide; oil and water; mud; salt water; water; nitrogen.

Formation Test Cushion Volume
The volume of cushion material used during the formation test.

Formation Test Flowing Recovery Time To Surface
The amount of time required for the fluid to flow from the formation to the surface after the test valve has been opened.

Formation Test Type
The type of test performed on the formation; e.g., absolute open flow; bailer test; air flow tests; initial potential rate test; isochronal test; 1st DST of 3 combined; production test; multi-point test; wireline test.

Formation Tester
SEE: Drillstem Test.

Formation Top Depth
SEE: Geologic Marker Measured Top Depth.

Formation Top Measured Depth
The depth to the top of a geologic formation measured along the borehole from a surface reference point to the top of the formation.

Formation Top True Vertical Depth
The depth to the top of a geologic formation measured from a surface reference straight down to the top of the formation.

Formation True Vertical Base Depth
SEE: Geologic Marker True Vertical Depth.

Formation True Vertical Top Depth
SEE: Geologic Marker True Vertical Depth

Formation Tvt Md Tvd Code
Indicates whether the true vertical thickness (TVT) of the formation was calculated from a measured depth (MD) or true vertical tdepth (TVD) log.

Formation Tvt Top Contact Code
Indicates whether the true vertical thickness (TVT) of the formation was calculated from the top of the formation or the gas/oil contact.

Formation Volume Factor
(1) The ratio of the volume occupied by a quantity of fluid at reservoir conditions to that occupied by the same quantity at stock tank or standard conditions.(2) The inverse of Reservoir Volume Factor.

Formation Water
Water that fills a portion of rock pore space. Water that is inherent to the rock.

Formation Water Dissolved Solid Volume
The total dissolved solids content in formation water.

Formation Water Resistivity
Resistivity of formation water at reservoir temperature.

Formation Water Salinity Ions
The salinity ions of the formation water; e.g., boron; chlorides; bromide; iodide; silica; lithium.

Formation Water Salinity Quantity
The quantity of sodium chloride contained in a unit volume of formation water.

Formation Water Specific Gravity
Specific gravity of formation water.

Formation Water Specific Gravity Measurement Temperature The Temperature At Which The Specific Gravity Of The Formation Water Was Measured.

Former Operator Name
The name of the previous operator.

Forward Sales (nymex)
The process of selling NYMEX futures contracts or entering into swaps to price gas for future month deliveries, when traditional cash markets are unable or unwilling to commit to prices equivalent to those available at NYMEX or over-the-counter.

Fossil
Preserved remains, impressions or indications of ancient animals or plants in the rocks.

Fossil Assemblage
A group of fossils occurring at the same stratigraphic level and used for geologic interpretations.

Fossil Fuel
Coal, oil, and natural gas; so called because they are derived from the remains of ancient plant and animal life.

Fossil Name
Name of fossil found in the indicated interval.

Foundation Bolt
The bolts used to connect a swing bearing to the upper structure and/or pedestal. Also referred to as: Foundation Fastener.

Four Cone Symmetrical Bit
A four cone roller rock bit with nearly a flat face and no cone offset. Used in some areas to hold inclination and direction when three cone rock bits have a tendency to walk or deviate.

Four Point Test
A method used to determine the productive capacity of gas wells. The wellhead pressures and quantities of gas produced are measured under stabilized conditions or at certain fixed time intervals. From a plot of these data, the amount of gas the well completion would be able to deliver may be computed. Choke size and choke variations are essential in computations.

Frac Oil
Oil injected into a well in a fracturing operation which may then be recovered through subsequent production. Also known as Load Oil.

Frac Oil Volume
The volume of frac (load) oil injected into a well in a fracturing operation which may then be recovered through subsequent production.

Fractional Township, Range, And Section
The fractional portion of a township, range, and section.

Fractionation
The separation of a liquid stream into its separate components.

Fractionation Tower
A tall, cylindrical refining vessel where liquid feedstocks are separated into various components or fractions. Also referred to as: Fractionator.

Fracture
The cracks, crevices, faults or joints in the formation either inherent or induced.

Fracture Azimuth
The azimuth of the fractures in a depth interval.

Fracture Fluid Type
Classification of substances used to hold liquids in suspension. Examples are: Nitrogen Foam, CO2 Foam, and treated water (gel).

Fracture Gradient Measurement
The minimum yield strength of a given formation expressed over the depth of the well.

Fracture Height
The height of the given hydraulic fracture where the rock fracture intersects wall of the borehole.

Fracture Length
The length of one wing of the given hydraulic fracture.

Fracture Log
A well log designed to indicate fractures in the rocks surrounding the borehole. The logging tool may use acoustic techniques or resistivity measurements.

Fracture Mechanism
A description of the fracture mechanism; e.g., tension; shear.

Fracture Permeability
The single phase permeability of a fracture.

Fracture Spacing
The distance between adjacent fractures.

Fracture Treatment Type
The type of fracture treatment; e.g., acid; proppant.

Fracture Width
The average width of the given hydraulic fracture.

Fracturing
The use of explosives, hydraulics, or other techniques in a borehole to fracture the surrounding formation, allowing oil and gas to flow more freely to the borehole.

Framework
Sedimentology: The rigid arrangement created in a sediment or sedimentary rock by particles that support one another at their points of contact. The mechanically firm structure capable of supporting open pore spaces.

Free Butane
The quantity of butane extracted in a processing plant for which lease settlement is included in the settlement made for natural gasoline, by virtue of the gasoline settlement being based on a higher vapor pressure natural gasoline than the vapor pressure of the natural gasoline actually extracted. Also referred to as: Excess Butane.

Free Gas
Gas produced from the gas cap of an oil reservoir.

Free Liquid Film
The layer of liquid that surrounds each separate particle in the underflow of a hydrocyclone and screens. The thickness of this film depends upon design of the device and viscosity of the liquid.

Free Machining
A characteristic of being machined easily; i.e., this may be accomplished by adding sulfur to steel or lead to brass.

Free Point Depth Measurement
The depth at which at which a pipe is free to move in or out the wellbore.

Free Point Tool Flag
An indicator that a tool designed to measure the amount of stretch in a string of stuck pipe, and in so doing to indicate the deepest point at which the pipe is free is being used. The free point indicator is lowered into the wellbore on a conducting cable.

Free Water Knockout
A vertical or horizontal vessel into which oil or emulsion is run in order to allow the water that is not emulsified with the oil (free water) to drop out.

Freezing Operation
Creation of a plug by freezing a liquid in a pipe or fitting to confine the pressure while removing defective or inadequate equipment downstream of the plug.

Frequency
The repetition rate of a periodic waveform usually measured in cycles per second or hertz.

Fresh Water System Cost
Includes construction costs and all general water lines, water-storage tanks, water-treating facilities, wells, pumps, regulators, meters, and controllers installed primarily for general plant service and not classified under other items.

Friction
The resistance to movement created when two surfaces are in contact. When friction is present, heat is produced. Sometimes referred to as drag, in wireline operations.

Front Month
SEE: Spot Month.

Frozen Up
Equipment in which the components do not operate freely.

Fuel
Any material which will burn.

Fuel Cost Amount
The total of all construction costs and all general fuel-gas lines, regulators, and accessory equipment, such as fuel-gas lines to engines, boilers, heaters.

Fuel Gas Scrubber
A vessel through which fuel passes to purify fuel, primarily of moisture prior to use.

Fuel Gas System Cost
Costs include contruction costs and all general fuel gas lines, regulators, and accessory equipment in the plant, such as fuel gas lines to engines, boilers, and heaters.

Fuel Gas Treating Unit
A device designed to cryogenically remove heavier components of the natural gas stream for the purpose of providing a clean, dry fuel with a lowered BTU content at remote engine sites.

Fuel Gas Volume
The measured or calculated volume of gas consumed by production and operational facilities. Commonly referred to as lease use gas.

Full Bore Valve
A valve whose closure mechanism has the same bore dimensions as the valve body.

Full Cost Accounting Method
An accounting method under which all costs incurred in searching for, acquiring, and developing oil and gas reserves are capitalized and amortized using units of production, as defined by the Securities and Exchange Commission (SEC) in Federal Regulation SX 210:4-10.

Full Crest Thread Length
The length of machine threads, from the end of the machined threads, including the incomplete starting threads, where the crests have full form.

Full Packed Assembly
A configuration of tools with a relatively high degree of rigidity and wall bearing surfaces.

Full Well Stream
The production of a well prior to any separation of fluid components.

Fullbore Spinner Flowmeter
A flowmeter with retractable impeller blades which can be used below the bottom of tubing where the impeller blades open to almost full inside diameter of the casing.

Function
A function will be of the form y = f(x) where both x and y may be vectors (or matrices): x [x(l),...,x(m)] and y = [y(l),...,y(n)]. A discretely defined function will consist of (m+n)-tuples of x and y values. A function has the property that, for any given x, there is more than one y defined.

Funnel Viscosity
SEE: Marsh Funnel Viscosity.

Furnishings Cost
Costs include furnishings located in all buildings in the camp, such as stoves, beds, tables, chiffoniers, chairs, work tables, and testing stands.

Furring
Buildup or bristling of magnetic particles at the ends of a longitudinal magnetized pipe; i.e., at its poles.

Fusible Material
A material that will melt at a predetermined temperature to identify an abnormal operating condition. A meltable plug or seal.

Fusible Plug
A plug or portion of a valve or system which is designed to melt in case of excess heat or a fire and actuate the fail safe features of the valve or system.

Future Acquired Reserves Provision Flag
An indicator of whether or not the contract has a provision committing gas reserves acquired after the date of the contract.