Glossary

A well used for the purpose of injecting produced water back into the ground.

A broad term encompassing any method of extracting oil from a reservoir after a well or field has exhausted its primary production.

Gas which is dissolved in oil in the reservoir under pressure.

(SWR 79) Any natural gas containing more than 1-1/2 grains of hydrogen sulfide per 100 cubic feet or more than 30 grains of total sulfur per 100 cubic feet, or gas which in its natural state is found by the Commission to be unfit for use in generating light or fuel for domestic purposes.

Short term, non-regulated, arms length contract sales of natural gas, crude oil, refined products, or liquid petroleum gas.

Date that drilling begins.

A gas that is stored in an underground reservoir.(see underground hydrocarbon storage)

Tank for the accumulation of oil pending transferal to a pipeline company or other purchaser.

Series of electric logs that illustrate formation correlation with one formation as a datum.

A well nearing depletion that produces a very small amount of oil or gas, usually ten barrels

See Anticline

Series of electric logs that illustrate subsurface structure by placing the logs relative to sea level.

Amount of acreage that is less than the standard amount for a proration unit for a field.

Outer casing cemented in the upper portion of the wellbore to protect fresh water formations from contamination.

noun: a hollow, rubber-faced cylinder mounted on a hollow mandrel with a pin joint on the upper end to connect to the swab line. A check valve that opens upward on the lower end provides a way to remove the fluid from the well when pressure is insufficient to support flow. verb: 1. to operate a swab on a wireline to bring well fluids to the surface when the w4ell does not flow naturally.  Swabbing is a temporary operation to determine whether the well can be made to flow. If the well does not flow after being swabbed, a pump is installed a a permanent lifting device to bring the oil to the surface. 2. to pull formation fluids into a wellbore by raising the drill stem at a rate that reduces the hydrostatic pressure of the drilling mud below the bit.

All natural gas except sour gas and casinghead gas.