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The AAPG/Datapages Combined Publications Database
West Texas Geological Society
Abstract
A Stochastic Modeling Workflow for 
Petrophysical
Interpretation of Spraberry-Wolfcamp Reservoirs
Abstract
Recent advances in fracture stimulation techniques along with strong oil prices have revived interest in the Spraberry-Wolfcamp formations in West Texas. These reservoirs are low porosity, low permeability rocks comprised of quartz, clays, and calcite along with significant quantities of dolomite, pyrite, and kerogen. The petrophysical analysis of the Spraberry-Wolfcamp interval is analogous to that of unconventional shale plays like the Barnett formation. A workflow for a volume based interpretation of reservoirs with these characteristics will be shown. Then a typical well in the area will be selected and a stochastic model of the Spraberry-Wolfcamp interval will be generated that is calibrated to XRD analysis of drill cuttings. This model will then be applied to other wells in the trend to demonstrate the validity of the interpretation. The analysis
of results will include comparison to production data.
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