| Word | Definition |
| Landfill Gas | Gas that is generated by decomposition of organic material at landfill disposal sites. The average composition of landfill gas is approximately 50 per... |
| Landman | A member of the exploration team whose primary duties are formulating and carrying out exploration strategies and managing an oil company's relati... |
| Leachate | The liquid that has percolated through the soil or other medium. |
| Lease | An agreement between two or more parties where the owner of the land grants another party the right to drill and produce petroleum substances in excha... |
| Lease and Plant Fuel | Natural gas used in well, field, and lease operations (such as gas used in drilling operations, heaters, dehydrators, and field compressors) and as fu... |
| Lease Condensate | A mixture consisting primarily of pentanes and heavier hydrocarbons which is recovered as a liquid from natural gas in lease separation facilities. Th... |
| Lease Equipment | All equipment located on the lease except the well to the point of the "Christmas tree." |
| Lease Fuel | Natural gas used in well, field, and lease operations, such as gas used in drilling operations, heaters, dehydrators, and field compressors. |
| Lease Operations | Any well, lease, or field operations related to the exploration for or production of natural gas prior to delivery for processing or transportation ou... |
| Lease Separation Facility (Lease Separator) | A facility installed at the surface for the purpose of (a) separating gases from produced crude oil and water at the temperature and pressure conditio... |
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