A two-dimensional regional basin model of Williston basin hydrocarbon systems
Journal Article
·
· AAPG Bulletin
OSTI ID:232994
- Institut Francais due Petrole, Rueil-Malmaison (France); and others
Institut Francais du Petrole`s two-dimensional model, TEMISPACK, is used to discuss the functioning of petroleum systems in the Williston basin along a 330-km-long section, focusing on four regional source intervals: Ordovician Yeoman formation, Lower Devonian Winnipegosis Formation, Upper Devonian-Lower Mississippian Bakken Formation, and Mississippian Lodgepole formation. Thermal history calibration against present temperature and source rock maturity profiles suggests that the Williston basin can be divided into a region of constant heat flow of about 55 mW/m{sup 2} away from the Nesson anticline, and a region of higher heat flow and enhanced thermal maturity in the vicinity of the Nesson anticline. Original kinetic parameters used in the calibration were derived for each of the four source rocks from Rock-Eval yield curves. Bakken overpressures are entirely due to oil generation, not compaction disequilibrium. Very low Bakken vertical permeabilities range from 0.01 to 0.001 and are matched against observed overpressures, whereas Bakken porosities based on the model and confirmed by measurements are inferred to be also unusually low, around 3%.
- OSTI ID:
- 232994
- Journal Information:
- AAPG Bulletin, Journal Name: AAPG Bulletin Journal Issue: 2 Vol. 80; ISSN 0149-1423; ISSN AABUD2
- Country of Publication:
- United States
- Language:
- English
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Conference
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Fri Jul 01 00:00:00 EDT 1994
· AAPG Bulletin (American Association of Petroleum Geologists); (United States)
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OSTI ID:7018069