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Electric Logs

Recording that indicates the well's rock formation characteristics by different responses to electric current.

Enhanced Oil Recovery (EOR)

The use of any process for the displacement of oil from the reservoir other than primary recovery.

Ethane

A colorless odorless gaseous hydrocarbon with the characteristics of the predominant molecule, CH3CH3.

Exploration

The search for reservoirs of oil and gas, including aerial and geophysical surveys, geological studies, core testing, and drilling of wildcats.

Exploratory Well

Any well drilled for the purpose of securing geological or geophysical information to be used in the exploration or development of oil, gas, geothermal, or other mineral resources, except coal and uranium, and includes what is commonly referred to in the industry as "slim hole tests," "core hole tests," or "seismic holes".

Extraction Loss

The reduction in volume and energy content of natural gas resulting from the removal of natural gas liquid constituents.