Glossary
| 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. |