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Oil & gas

Terms concerning oil and gas as a fossil fuel and natural resource.

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backup curve

Oil & gas; Oilfield

An extra curve on a log, designed to appear when the standard curve goes off track. For example, if the standard gamma ray curve is presented on a scale of 0 to 200 gAPI units, ...

capsule gun

Oil & gas; Oilfield

An exposed gun system used primarily in wireline operations. This gun system has shaped charges that are housed in individual pressure-tight capsules mounted on a metal strip, ...

material balance

Oil & gas; Oilfield

An expression for conservation of mass governed by the observation that the amount of mass leaving a control volume is equal to the amount of mass entering the volume minus the ...

analog

Oil & gas; Oilfield

An example used for comparison. In oil and gas exploration, geoscientists and engineers compare new prospects and fields with fields and surface exposures thought to be similar in ...

chelation

Oil & gas; Oilfield

An equilibrium reaction between a metal ion and a complexing agent. Chelation reactions are characterized by the formation of more than one bond between the metal and a molecule ...

saturation equation

Oil & gas; Oilfield

An equation for calculating the water saturation from resistivity and other logs. There are many saturation equations. Practical equations are all extensions of the Archie ...

structural analysis

Oil & gas; Oilfield

An examination of a geological scenario to understand the geometry and spatial arrangement of rocks. The structure or deformation can include many mechanisms, such as folding, ...