Seismic Stratigraphic Interpretation of the Fort Union Formation, Western Wind River Basin: Example of Subtle Trap Exploration in a Nonmarine Sequence
R. Randy Ray, 1982. "Seismic Stratigraphic Interpretation of the Fort Union Formation, Western Wind River Basin: Example of Subtle Trap Exploration in a Nonmarine Sequence", The Deliberate Search for the Subtle Trap, Michel T. Halbouty
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The integrated use of seismic reflection data with regional well control allows a time-stratigraphic reconstruction of lithofacies in the Fort Union Formation in the western part of the Wind River basin, Wyoming. The Paleocene Fort Union Formation is a part of a continuous sequence of alluvial, fluvial, and lacustrine sediments that infilled the basin during latest Cretaceous through early Eocene time. Five regional unconformities are recognized on the seismic line and are used to define four depositional sequences. Lithofacies within the depositional sequences are seen as lateral variations in seismic reflection continuity, amplitude, and frequency. Seismic-stratigraphic analysis of the area refines the understanding of entrapped hydrocarbons at Fuller Reservoir field and outlines a fairway for future exploration of subtle traps in the Fort Union Formation.
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The papers included in this volume reflect both the geological and geophysical rationale used in searching for the subtle trap. The scope of the papers ranges from the general appraisal papers of new concepts and methods, to those relating to specific fields in the United States, Nigeria, China, Australia, Canada, Oman, offshore Spain, and the North Sea. The 21 chapters are sourced from a 1981 AAPG Annual Meeting session, dedicated to providing explorationists with the information needed to search for and discover the stratigraphic, paleogeomorphic, and unconformity-oriented subtle-trap accumulations of oil and gas.