Diagenesis and fracture development in the Bakken Formation, Williston Basin: Implications for reservoir quality in the middle member
Professional Paper
1653
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Abstract
The middle member of the Bakken Formation is an attractive petroleum exploration target in the deeper part of the Williston Basin because it is favorably positioned with respect to source and seal units. Progressive rates of burial and minor uplift and erosion of this member led to a stable thermal regime and, consequently, minor variations in diagenesis across much of the basin. The simple diagenetic history recorded in sandstones and siltstones in the middle member can, in part, be attributed to the closed, low-permeability nature of the Bakken petroleum system during most of its burial history. Most diagenesis ceased in the middle member when oil entered the sandstones and siltstones in the Late Cretaceous. Most oil in the Bakken Formation resides in open, horizontal fractures in the middle member. Core analysis reveals that sandstones and siltstones associated with thick mature shales typically have a greater density of fractures than sandstones and siltstones associated with thin mature shales. Fractures were caused by superlithostatic pressures that formed in response to increased fluid volumes in the source rocks during hydrocarbon generation
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Diagenesis and fracture development in the Bakken Formation, Williston Basin: Implications for reservoir quality in the middle member |
| Series title | Professional Paper |
| Series number | 1653 |
| DOI | 10.3133/pp1653 |
| Year Published | 2001 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | Eastern Energy Resources Science Center |
| Description | 19 p. |
| Country | United States |
| State | North Dakota |
| Other Geospatial | Bakken Formation, Williston Basin |
| Google Analytic Metrics | Metrics page |