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Oil & gas

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

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Oil & gas > Drilling

monopole
Oil & gas; Drilling

Describing a type of acoustic transducer that emits or receives energy in all directions. Monopole transducers are used in standard sonic logs, and also in array-sonic logs to ...

cross dipole
Oil & gas; Drilling

Describing a waveform or a log that has been recorded by a set of dipole receivers oriented orthogonally (or 90 0 out of line) with a dipole transmitter. In sonic logging, ...

tight
Oil & gas; Drilling

Describing a relatively impermeable reservoir rock from which hydrocarbon production is difficult. Reservoirs can be tight because of smaller grains or matrix between larger ...

ball-operated
Oil & gas; Drilling

Describing a mechanism or system that is actuated by a ball that is dropped or pumped through the tubing string. Once located on a landing seat, the tool mechanism is generally ...

competent
Oil & gas; Drilling

Describes a bed that maintains its original thickness during deformation. Often pertains to relatively brittle, solid strata that deform by faulting, fracturing or folding, rather ...

high-gravity solids
Oil & gas; Drilling

Dense solids, such as barite or hematite, which are added to a mud to increase its density, also known as weighting material. The concentration of high-gravity solids in a ...

sour
Oil & gas; Drilling

Contaminated with sulfur or sulfur compounds, especially hydrogen sulfide. Crude oil and gas that are sour typically have an odor of rotten eggs if the concentration of sulfur is ...

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