--> Stratigraphy, Seismic Characteristics, and Reservoir Properties of the Desmoinesian Granite Wash, Buffalo Wallow Field Area, Anadarko Basin, Texas
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Stratigraphy, Previous HitSeismicNext Hit Characteristics, and Reservoir Properties of the Desmoinesian Granite Wash, Buffalo Wallow Field Area, Anadarko Basin, Texas

Doga E. Senoglu, Matthew J. Pranter and Kurt J. Marfurt

ConocoPhillips School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma, United States

June 20, 2016 Monday 9:00 A.M. AAPG Annual Convention and Exhibition, Calgary, Alberta, Canada

Abstract

The Desmoinesian Granite Wash is a productive oil and gas play of the southern Anadarko Basin. It includes a series of alluvial fans, fan-deltas, proximal turbidites, and debris flows deposited in association with the Amarillo-Wichita uplift. The deposits occur as several thousand feet of conglomerates, sandstones, carbonates, and shales that form complex low-permeability and generally low-porosity reservoirs. The stratigraphic and Previous HitstructuralNext Hit framework and reservoir characteristics of the Desmoinesian Granite Wash are established using a 28 mi2 (72 km2) Previous Hit3-DNext Hit Previous HitseismicNext Hit survey, logs Previous HitfromNext Hit 450 wells, and petrophysical Previous HitdataNext Hit derived Previous HitfromNext Hit published cores. The lithologies and well-log signatures of the different reservoirs are highly variable. The dominant lithofacies include cross-bedded sandstone, parallel-stratified sandstone, planar-laminated sandstone, structureless sandstone, bioturbated sandstone, and silt-rich mudstone. Artificial-neural-network (ANN) techniques are used to estimate lithology logs in non-cored wells by utilizing core and well logs. Key stratigraphic surfaces are commonly related to laterally extensive shales. The Desmoinesian Granite Wash is subdivided into 10 intervals based on net-to-gross ratio, regional trends in well-log signatures, and Previous HitseismicNext Hit reflection character. Detailed interpretation of Previous Hit3-DNext Hit Previous HitseismicNext Hit Previous HitdataNext Hit also illustrates that the Granite Wash interval exhibits several high-angle reverse faults with significant offset. Results Previous HitfromNext Hit P-impedance Previous HitinversionNext Hit are used with the estimated lithology logs, and the established stratigraphic and Previous HitstructuralNext Hit framework to constrain the spatial distribution of lithology and petrophysical properties in Previous Hit3-DNext Hit reservoir models. The models illustrate the stratigraphic architecture, main Previous HitstructuralTop elements, and their relationship to Granite Wash reservoir quality distribution for the study area.

AAPG Datapages/Search and Discovery Article #90259 ©2016 AAPG Annual Convention and Exhibition, Calgary, Alberta, Canada, June 19-22, 2016