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Oil & gas

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

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deep induction

Oil & gas; Oilfield

A particular type of induction log that was designed to read deep into the formation while maintaining reasonable vertical resolution. The deep induction log (ID) is based on the ...

broadside array

Oil & gas; Oilfield

A particular arrangement of transmitters and receivers used in the electromagnetic propagation measurement in which the dipoles used as sensors are oriented perpendicular to the ...

electrical survey

Oil & gas; Oilfield

A particular combination of a spontaneous potential log and three electrical logs consisting of a 16-in. (40-cm) short normal, a 64-in. (162-cm) long normal and an 18-ft, 8-in. ...

Humble formula

Oil & gas; Oilfield

A particular relation between the formation factor (F) and porosity (phi) proposed by the Humble Oil Company. The original formula was expressed as F = 0. 62 / phi 2. 15 . A ...

laminated sand

Oil & gas; Oilfield

A particular model, or equation, for deriving the water saturation from resistivity and other logs. The model assumes a laminar shale distribution and considers the total ...

Gaussian techniques

Oil & gas; Oilfield

A parametric approach to stochastic imaging or simulation of a reservoir. Simpler than the indicator (nonparametric) approach, Gaussian techniques include a normal score transform ...

upset

Oil & gas; Oilfield

A part at the end of tubulars, such as drillpipe, casing or other tubing, which has extra thickness and strength to compensate for the loss of metal in the threaded ends.