Glossary

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Term Definition
TCF

Trillion cubic feet of gas.

Tertiary

A period of geological time from approximately 2 to 65 million years ago. Subdivided into the Pliocene, Miocene, Oligocene, Eocene, and Paleocene.

Total depth (TD)

The final depth reached when drilling a well.

Trap

A structure capable of retaining hydrocarbons.

Trend

A particular direction in which similar geological features are repeated.

TVD

True vertical depth. The vertical depth below a given datum.

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