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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 47 (1963)

Issue: 12. (December)

First Page: 2074

Last Page: 2074

Title: Relationships of Reservoir Fluids in Delaware Sandstone Structures and Stratigraphic Traps: ABSTRACT

Author(s): William F. Grauten

Article Type: Meeting abstract


From the axis of the Delaware basin to the western monocline, the upper Delaware sandstone exhibits a regular progression from gas-bearing structures to oil-bearing structures updip, an example of Gussow's migration theory.

Beginning in western Reeves County, Texas, the monocline has trends of clean sandstone encased in very shaly laminated siltstone. These stratigraphic traps contain such perplexing fluid relationships as water above oil, and gas downdip from oil, both in the same correlative electric-log zone. The writer submits that these phenomena are caused by the entrapment of different fluids in lenses within a sandstone body. "Membranes" with various low permeabilities form the boundaries of the "sub-lenses" and control the migration of various fluids.

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Copyright 1997 American Association of Petroleum Geologists