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The AAPG/Datapages Combined Publications Database

Wyoming Geological Association

Abstract


Wyoming Gas Resources and Technology; 52nd Field Conference Guidebook, 2001
Pages 77-84

Structural and Stratigraphic Interpretation of the Muddy Formation Using the Manderson Field 3D Seismic Survey, Big Horn County, Wyoming

J. Chris Besler, Mark T. Kramer

Abstract

Manderson Field is part of one of the largest structrual complexes in the Big Horn basin. In 1995 KCS Mountain Resources acquired approximately 20 square miles of 3D seismic data in an effort to improve structural definition of the Phosphoria reservoir. The data were reprocessed in 1998 to further improve the image of the subsurface and to try to detect fractures that strongly influence production in the Phosphoria. Additional mapping in the 3D survey showed a strong amplitude anomaly at the Muddy formation. Furtherinvestigation indicated that strong amplitudes in the Muddy Previous HitreflectorNext Hit correspond to thick Muddy sands. Modeling of the seismic data indicates that the strong amplitude/thick Muddy sand relationship is the result of a thin bed tuning Previous HiteffectTop. Finally, Stratimagic, a seismic facies analysis software tool, was run on the 3D volume. There are several interesting patterns in the Stratimagic output, which may indicate facies changes in the Muddy reservoir.


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