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ABSTRACT: Predicting Fractured Reservoir Location and Attributes in the Permian Basin, West Texas: A Basin Modeling Approach Using CIRF.B

ORTOLEVA, PETER J., MAMDOUH SHEBL, THOMAS HOAK, and KENNETH SUNDBERG

A cooperative analysis of the Central Basin Platform and eastern Midland Basin is being conducted by the Indiana University-Laboratory for Computational Geodynamics, Phillips Petroleum Company, and Science Applications Intemational Corporation. The project is being funded by the U.S. Department of Energy in order to develop a quantitative model for predicting the present-day distribution and characteristics of naturally fractured carbonate reservoirs.

A unique three dimensional basin model and computer, simulator, CIRF.B, have been developed that account for key hydrologic, diagenetic and mechanical processes. All cross couplings among these processes are accounted for. Thus, the spatial distribution of vug collapse, hydrofracturing and, tectonic fracturing are predicted. The location and quality of fracture-related production sweetspots can be predicted to optimize exploration and production strategies.

Input to our fracture prediction code are the sedimentary, tectonic, thermal and sea level history as they interact with the sedimentary basin through its boundaries, so as to impose the geological constraints to the basin at its boundaries. The output is the evolution over geological time of the internal distribution of fluids, minerals, stress and temperature. This input data is the same as is usually available in an E&P basin workup.

Our CIRF.B model is applied to the Central Basin Platform and the Midland Basin of West Texas. Comparison is made with production and geological data.

AAPG Search and Discovery Article #90947©1997 AAPG Southwest Section Meeting, San Angelo, Texas