--> Abstract: Horizontal Bakken Production: Clues to a Fractured Source-Rock Reservoir, Williston Basin, North Dakota, by W. B. Hansen; #91012 (1992).

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ABSTRACT: Horizontal Bakken Production: Clues to a Fractured Source-Rock Reservoir, Williston Basin, North Dakota

HANSEN, WILLIAM B., U.S. Bureau of Land Management, Billings, MT

Four years of production data have become available since Meridian Oil completed the first horizontal well in 1987 in the Mississippian/Devonian Bakken Formation of North Dakota. Within certain "sweet spots" of the Bakken pinchout production "fairway," horizontal well production has varied from slow to precipitous declines. This suggests there are many discrete reservoirs along the fairway. A surprisingly large number of wells are exhibiting shallow declines, indicative of a reservoir where the fractures merely provide the conduit for production. Precipitous declines in some wells indicate the horizontal well has intersected a fractured reservoir where the fractures are the primary storage. The density of horizontal wells in the vicinity may also be causing drastic declines in some we ls.

 

AAPG Search and Discovery Article #91012©1992 AAPG Annual Meeting, Calgary, Alberta, Canada, June 22-25, 1992 (2009)