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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract

Volume: 10 (1926)

Issue: 4. (April)

First Page: 443

Last Page: 448

Title: Occurrence of Black Oil in Wyoming

Author(s): John G. Bartram

Abstract:

The black oil fields of Wyoming, which produce from the Embar and Tensleep formations of Permian-Pennsylvanian age, have been found only in a limited area in the west-central part of the state. Within this area most favorable anticlines are productive, and outside of it nothing commercial has been found on the many anticlines drilled. This condition is best explained by the character of the Embar formation, which is apparently the source of the oil. In the productive area, it is composed of marine limestones and limey shales, and in the barren areas of red beds and other flood-plain deposits. The limiting line of productive territory may be extended somewhat in the future, especially to the south and west. If good source rocks exist in other Paleozoic formations elsewhere in Wyoming, other black oil fields may be developed outside the present restricted area.

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