A cooperative study of the Grayburg/San Andres reservoir is planned for the Foster and South Cowden Fields, Ector County, Texas under the U.S. Department of Energy's Class II Program for ShallowShelf Carbonate. The project will utilize existing technology to increase oil production through infi11dri11ing, workovers, and water flood development. Productivity problems associated with a mature shall owshelf carbonate reservoir will be addressed by a multidisciplinary tech­ ni cal team which integrates high resolution 3-D seismic data, reservoir characterization techniques, and 3-D reservoir simulation.

A 3-D seismic survey designed specifically for i magi ng the Grayburg/ San Andres interval of the Foster and South Cowden fields will be acquired. A high performance computer work­ station will then be used to integrate existi ng subsurface geological and engineering data with the 3-D seismic data for a detailed evaluation of sequence strati graphy and facies relationships. Subsequentl y, a 3- D reservoir simulation model will use the results to hel pdefine flow units wi thin the reservoir. A field demonstrati on of in fill dri11ing and water flood deve1 opment wi11 follow.

The high resolution 3-D sei smic survey is expected to resol ve changes in the subsurface on the megascopic scal e, al l owi ng for carre­ lation of pet rophysical properties and stratigraphic information between boreholes. This informati on will be helpful in mapping porosity zones, permeability barriers, and "thief" zones within the reservoir.

A cooperative study of the Grayburg/San Andres reservoir is planned for the Foster and South Cowden Fields, Ector County, Texas under the U.S. Department of Energy's Class II Program for ShallowShelf Carbonate. The project will utilize existing technology to increase oil production through infi11dri11ing, workovers, and water flood development. Productivity problems associated with a mature shall owshelf carbonate reservoir will be addressed by a multidisciplinary tech­ ni cal team which integrates high resolution 3-D seismic data, reservoir characterization techniques, and 3-D reservoir simulation.

A 3-D seismic survey designed specifically for i magi ng the Grayburg/ San Andres interval of the Foster and South Cowden fields will be acquired. A high performance computer work­ station will then be used to integrate existi ng subsurface geological and engineering data with the 3-D seismic data for a detailed evaluation of sequence strati graphy and facies relationships. Subsequentl y, a 3- D reservoir simulation model will use the results to hel pdefine flow units wi thin the reservoir. A field demonstrati on of in fill dri11ing and water flood deve1 opment wi11 follow.

The high resolution 3-D sei smic survey is expected to resol ve changes in the subsurface on the megascopic scal e, al l owi ng for carre­ lation of pet rophysical properties and stratigraphic information between boreholes. This informati on will be helpful in mapping porosity zones, permeability barriers, and "thief" zones within the reservoir.

Field operators involved in the project include a major oil company and a sma11 independent operator which will be working together through a cooperative study agree­ ment. It is expected that this study will demonstrate a methodology of reservoir characterization and subsequent development of the Grayburg/ San Andres reservoir which is feasble for independent operators. Further­ more, it will provide one of the first public demonstrations of the enhancement of reser­ voir characterization using high resolution 3-D seismic data. Foremost, the study will stress the importance of utilizing an integrated multi-disciplinary approach for reservoir development. We believe that this method of reservoir evaluation will be applicable to shallow shelf carbonate reservoirs throughout the United States.

Technology transfer will take place through all phases of the project.

This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material, as presented, does not necessarily reflect any position of the Society of Petroleum Engineers, its officers, or members. Papers presented at SPE meetings are subject to publication review by Editorial Committees of the Society of Petroleum Engineers. Permission to copy is restricted to an abstract of not more than 300 words. Illustrations may not be copied. The abstract should contain conspicuous acknowledgment of where and by whom the paper Is presented. Write Librarian, SPE, P.O. Box 833836, Richardson, TX 75083-3836, U.S.A. Telex, 163245 SPEUT.