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Reservoir Compartmentalization of a Deep-Water Ooid Fan, Happy Field, Permian Basin

By
Jason L. Clayton
Jason L. Clayton
CML Exploration LLC, Barton Oaks Plaza 1, Suite 430, 901 Mopac Expressway South, Austin, Texas 78746, USA e-mail: ClaytonJ@cmlexp.com
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Charles Kerans
Charles Kerans
Department of Geosciences, Jackson School of Geosciences, The University of Texas at Austin, 1 University Station C1100, Austin, Texas 78712, USA
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Published:
January 01, 2014

Abstract

The Permian (Leonardian) Upper Spraberry Formation in the Happy Field of Garza County, Texas, contains an excellent example of a reservoir composed of resedimented carbonates in a deep-water slope-basin setting. The field has one of the most complete data sets of any producing deep-water carbonate reservoir known, including 15 whole cores with matching full suites of electric logs, and high-resolution three-dimensional (3D) seismic data. Sequence stratigraphic analysis combined with detailed characterization of analogous outcrops, detailed core-based sedimentology, and well-log analysis indicate that the Happy Field ooid fans are positioned within the transgressive systems tract of the fifth composite sequence in the Leonardian. The main reservoir facies are resedimented ooid and skeletal grainstone hyperconcentrated density flows that were focused downslope through a probable reentrant in the shelf margin and deposited in a long-lived topographic depression at the toe-of-slope. Vertical heterogeneity is set up by laterally extensive shale and silt beds that punctuate the oolitic density flows. Lateral heterogeneity and compartmentalization within the reservoir are created by younger mixed carbonate-siliciclastic debris flows that are highly erosive and are characterized by relatively low permeability.

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Contents

SEPM Special Publication

Deposits, Architecture, and Controls of Carbonate Margin, Slope and Basinal Settings

Klaas Verwer
Klaas Verwer
Statoil ASA, Sandsliveien 90 5124, Bergen, Norway
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Ted E. Playton
Ted E. Playton
Chevron Energy Technology Company, 1500 Louisiana St, Houston, Texas 77002, USA
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Paul M. (Mitch) Harris
Paul M. (Mitch) Harris
Chevron Energy Technology Company, 1500 Louisiana St, Houston, Texas 77002, USA
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SEPM Society for Sedimentary Geology
Volume
105
ISBN electronic:
9781565763241
Publication date:
January 01, 2014

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