| Abstract: | Vitrinite reflectance (Rm) profiles of wells drilled in abnormally pressured, low-permeability gas-bearing sequences in Rocky Mountain foreland basins are commonly non-linear with two or more nonparallel segments. These kinky profiles are most likely due to perturbations of the thermal gradient caused by contrasting heat transfer processes associated with the development of abnormally high pressures. We interpret the intersection of the shallow and intermediate Rm segments to mark the approximate original boundary between normal-pressured, water-bearing rocks and underlying overpressured gas- and water-bearing rocks. The intersection of the intermediate and deep Rm segments marks the approximate original boundary between overpressured gas- and water-bearing rocks and underlying overpressured gas-bearing rocks. However, because overpressuring is a transient condition that eventually evolves into normal pressuring or underpressuring, these intersections may not coincide with the present top of abnormal pressuring. -from Authors |
| Genre: | Article |
| ProdID: | 70015243 |
| Citation Author: | Law, B. E.; Nuccio, V. F.; Barker, C. E. |
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| Citation End Page: | 1010 |
| Citation Issue: | 8 |
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| Citation Language: | English |
| Citation Larger Work Title: | American Association of Petroleum Geologists Bulletin |
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| Citation Number Of Pages: | 12 |
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| Citation Search Results Text: | Kinky vitrinite reflectance well profiles: evidence of paleopore pressure in low-permeability, gas-bearing sequences in Rocky Mountain foreland basins; 1989; Article; Journal; American Association of Petroleum Geologists Bulletin; Law, B. E.; Nuccio, V. F.; Barker, C. E. |
| Citation Start Page: | 999 |
| Citation Volume: | 73 |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Kinky vitrinite reflectance well profiles: evidence of paleopore pressure in low-permeability, gas-bearing sequences in Rocky Mountain foreland basins; 1989; Article; Journal; American Association of Petroleum Geologists Bulletin; Law, B. E.; Nuccio, V. F.; Barker, C. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1989 00:00 -0600 |
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