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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 16 (1932)

Issue: 9. (September)

First Page: 864

Last Page: 880

Title: Character of Producing Sandstones and Limestones of Wyoming and Montana

Author(s): John G. Bartram (2)


Oil and gas are produced in Wyoming and Montana from a wider range of beds in the geologic section than in any other district in the United States, as commercial fields have been developed in Mississippian, Pennsylvanian, Permian (?), Jurassic, Lower Cretaceous, Upper Cretaceous, and Eocene formations. As this area received Pennsylvanian and Permian sediments from the Wichita uplift of Colorado, New Mexico, Texas, and Oklahoma; early Jurassic sediments from an uplift on the southwest; late Jurassic, Lower Cretaceous, and Upper Cretaceous sediments from the Cordilleran uplift of the Great Basin area on the west; and Eocene sediments from the Rocky Mountain uplift, it is evident that the origin and character of the beds vary greatly. The purpose of the writer is to describe the characteristics of the different producing sandstones and limestones and to make available information that may help solve the modern production problems of unit operation, well spacing, repressuring, and the like. All of these formations have different characteristics and each must be drilled and operated in a separate manner, even though several may produce on the same anticline.

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