Oil and Gas Terms Beginning with “F” — Page 5

Flow period, in well testing and reservoir engineering, refers to the interval of time during which a well is produced at a controlled rate (or allowed to flow freely) while downhole pressure and surface rate… Read more →

A flow profile is a wellbore logging measurement that records the rate of fluid flow at different depths in a production or injection well, typically expressed in barrels per day for liquids or thousand standard cubic… Read more →

What Is a Flow Regime in Oil and Gas Reservoir Engineering? A flow regime in petroleum reservoir engineering describes the spatial and temporal pattern of fluid flow in the reservoir surrounding a well during production… Read more →

Flow simulation in petroleum engineering is the dynamic numerical modeling of fluid flow through a reservoir over time using a computer-based mathematical representation of the reservoir's rock properties, fluid… Read more →

Flow structure in petroleum geoscience refers to the sedimentary, volcanic, and diagenetic textures and fabrics in rocks that record the direction, style, and rate of original fluid or particulate flow during deposition… Read more →

What Is a Flow Unit? Flow unit (also called a hydraulic flow unit or reservoir flow unit ) is a stratigraphically continuous rock interval characterized by internally consistent petrophysical properties, bounded above… Read more →

What Is a Flow-After-Flow Test? Flow-after-flow test (also called a backpressure test or four-point test) is a deliverability testing method for gas wells in which the well is produced at a series of increasing… Read more →

Referring to a type of spinner flowmeter in which most or all of the fluid flow in the well is diverted over the spinner by a device such as a basket or a packer. Read more →

Flower structures are folded geological structures associated with strike-slip faults that produce characteristic upward-or-downward divergent fault patterns reminiscent of flower petals when viewed in vertical cross… Read more →

What Is a Flowing Neutron Log? A flowing neutron log records neutron porosity measurements while a well is producing, with the objective of locating the gas-oil contact inside the borehole by comparing dynamic… Read more →

The pressure determined at the formation face during the flowing periods of a well test. Read more →

(noun) A well that produces oil, gas, or other reservoir fluids to the surface under natural reservoir pressure without the need for artificial lift equipment such as a beam pump, electric submersible pump, or gas lift… Read more →

A surface pipeline carrying oil, gas or water that connects the wellhead to a manifold or to production facilities, such as heater-treaters and separators. Read more →

A pipe fitting with several lateral outlets for connecting flowlines from one or more wells. This connection directs flow to heater-treaters, separators or other devices. Read more →

A mud sample that exits directly out of the well from the annulus and is caught before it passes through the shale-shaker screens. A flowline mud sample contains drill cuttings entrained in the mud. Read more →

What Is a Flowmeter? A flowmeter measures the volumetric or mass flow rate of oil, gas, water, or multiphase fluid streams at surface facilities, pipeline transfer points, and wellhead metering stations — providing the… Read more →

The flow of oil, gas or water through a pipe. Read more →

The fluid sample from the wellhead that is used to analyze the composition of the flow. The term is analogous to the term flowline sample, except that it refers to the production part of the flowstream. Read more →

Flue gas in petroleum engineering refers to the exhaust gases produced by the combustion of hydrocarbon fuels in furnaces, boilers, engines, flares, and industrial process heaters used in oil and gas production and… Read more →

A fluid compatibility test is a laboratory evaluation performed to determine whether two or more fluids — which will contact each other during drilling, completion, stimulation, or production operations — will mix… Read more →

Fluid compressibility, formally the coefficient of isothermal compressibility, is the fractional change in fluid volume produced by a unit change in pressure at constant temperature, expressed mathematically as c =… Read more →

What Is a Fluid Contact? Fluid contact (also called a phase contact or fluid interface ) is the subsurface depth at which one reservoir fluid phase transitions to another within a pore system — specifically the… Read more →

Fluid flow describes how oil, gas, and water move through pores, throats, and fractures of permeable rock within a hydrocarbon reservoir, and it forms the foundation of every production forecast, well-test analysis, and… Read more →

A general term to describe the presence of a particular fluid in an undesirable area, such as the movement of drilling mud into a section of the reservoirformation. Read more →

The depth, or distance from surface, that the fluid in a well incapable of natural flow will reach under static conditions. Read more →

Fluid loss, in drilling and well completion engineering, refers to the migration of the liquid phase of a drilling mud, cement slurry, or completion fluid through the permeable formation wall into the formation pore… Read more →

Fluid loss control in drilling and completion engineering refers to the management of filtrate invasion — the process by which liquid from the wellbore fluid (drilling mud, completion fluid, or cement slurry) migrates… Read more →

Fluid-loss control material is a category of drilling fluid additives specifically engineered to reduce the volume of filtrate (liquid phase of the drilling mud) that passes through the filter medium formed by the… Read more →

What Is Fluid Pound? Fluid pound (also called pump pound or incomplete fillage ) is a damaging mechanical condition in a sucker rod pumped well in which the pump plunger strikes liquid that has only partially filled the… Read more →

A tool run on wireline to obtain fluid samples and measure formation pressures. This device is also called a wireline formation tester. Read more →