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The AAPG/Datapages Combined Publications Database

Earth Science Bulletin (WGA)


Earth Science Bulletin
Vol. 15 (1982), No. 1. (Annual), Page 130

Abstract: Depositional Environment and Porosity Distribution in Sussex Sandstone, Morton Field, Converse County, Wyoming

Gene R. George1

Joint Meeting: University of Wyoming Department of Geology and Geophysics Wyoming Geological Association Geological Survey of Wyoming: April 2-4, 1982 Laramie, Wyoming: Subsurface Practices in Geology and Geophysics Abstracts of Papers - Compiled by James R. Steidtmann

Morton Field was first discovered in 1967 and was rediscovered in 1980. The Upper Cretaceous Sussex Sandstone produces oil from four sand benches which were deposited in a shallow marine shelf environment. The pool occurs where the Sussex subcrops beneath the Oligocene White River Formation. The trap appears to be formed by overlying White River shales and reduced permeability at the weathered Sussex subcrop. The field has produced 76,384 bbls of 39.8° gravity oil which may have migrated up from the “Powder River Basin deep” via a 6,500 ft fault along the north side of the field.

Acknowledgments and Associated Footnotes

1 Gene R. George: George Exploration Co., Casper, Wyoming

© Wyoming Geological Association, 2015