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The AAPG/Datapages Combined Publications Database
Montana Geological Society
Abstract
MTGS-AAPG
Montana Geological Society: 1991 Guidebook to Geology and Horizontal Drilling of the Bakken Formation
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ABSTRACT: Analysis of Horizontal Bakken Development*
ABSTRACT
Geologic evidence suggests that a large portion of the 100 to 150 billion barrels of oil generated in the Bakken has been trapped, resulting in an overpressured environment covering millions of acres. Petrographic information indicates that regional and interstitial forces have created widespread fracture systems.
Reservoir and production studies help to clarify the magnitude and potential of the Bakken reservoir. Although there is substantial
evidence of a widespread, massive accumulation of oil reserves within the Bakken, the development of this prospect is primarily
dependent upon understanding the in-situ fracture systems. Reservoir data indicates the type, magnitude, and interconnectivity
of the fracture systems. It is apparent from this information that the intensity of fracture spacing has generated regions
of effective communication and common drainage. The size and implication of these pools is addressed. Finally, a summary
of
the horizontal wells drilled to date and an analysis of their azimuth and length of penetration is related to their productivities.