The Barnett Shale is a 5,000-square-mile, hydrocarbon-producing geological formation in North Central Texas, known for helping kick off the shale revolution by pioneering the effective combination of hydraulic fracturing and horizontal drilling to extract gas from tight, organic-rich Mississippian-age sedimentary rocks. Located in the Bend Arch–Fort Worth Basin and covering parts of at least 17 counties, it was the first major shale play to become commercially viable and continues to be a significant natural gas and oil reservoir today.
Geological Characteristics and Location
- Location: The formation is situated in the Bend Arch–Fort Worth Basin, primarily in North Texas, and underlies portions of the Dallas–Fort Worth metroplex.
- Age: The Barnett Shale consists of sedimentary rocks from the Mississippian period, approximately 354 to 323 million years ago.
- Composition: It is an organic-rich, tight shale known for low porosity and permeability, meaning gas and oil do not flow easily through the rock without stimulation.
The Shale Revolution and Extraction
- Pioneering technology: The Barnett Shale is widely associated with the shale revolution, as Mitchell Energy helped demonstrate a commercially effective combination of horizontal drilling and hydraulic fracturing.
- Extraction process: Hydraulic fracturing injects fluid and proppant into the formation to create and hold open fractures, while horizontal drilling increases the length of wellbore exposed to the reservoir.
- Economic viability: These techniques helped turn the formation into a significant commercial gas field. Economics still depend on geology, commodity prices, costs, regulations, and individual well performance.
Significance and Production
- Major gas field: The Barnett is a significant natural gas deposit. The U.S. Energy Information Administration's year-end 2021 reserves table lists 13.6 trillion cubic feet for the Fort Worth/Barnett entry. Reserve estimates are date-specific and can change with economic and technical conditions.
- Oil and condensate: While chiefly known for natural gas, the formation can also produce oil and natural gas liquids in some areas.
- Operators: Examples named in background material include BKV Barnett, Devon Energy, and EOG Resources. This is not an endorsement or an assertion that any particular company currently operates every part of the formation; operator positions and activity can change.
This page is for general information only. It does not constitute an offer to sell or a solicitation to buy securities, an investment recommendation, or technical advice. Oil and gas projects can involve substantial risks and may result in loss of capital.