File:Schematic cross-section of general types of oil and gas resources and the orientations of production wells used in hydraulic fracturing.jpg
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Summary
| Description |
English: Shown are conceptual illustrations of types of oil and gas wells. A vertical well is producing from a conventional oil and gas deposit (right). In this case, a gray confining layer serves to “trap” oil (green) or gas (red). Also shown are wells producing from unconventional formations: a vertical coalbed methane well (second from right); a horizontal well producing from a shale formation (center); and a well producing from a tight sand formation (left). Note: Figure not to scale. Modified from USGS (2002) and Newell (2011). |
| Date | |
| Source | U.S. EPA. Assessment of the Potential Impacts of Hydraulic Fracturing for Oil and Gas on Drinking Water Resources (External Review Draft). U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-15/047, 2015. |
| Author |
Unknown author US Government employee |
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Licensing
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This image (or other media) is a work of an Environmental Protection Agency employee, taken or made as part of that person's official duties. As works of the U.S. federal government, all EPA images are in the public domain.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:26, 4 June 2015 | | 1,431 × 839 (151 KB) | Ain92 | higher quality |
| 18:25, 4 June 2015 |  | 1,431 × 839 (113 KB) | Ain92 | User created page with UploadWizard |
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