INTEGRATED SEISMIC RESERVOIR CHARACTERIZATION AND MODELING: A GULF OF MEXICO 3D CASE HISTORY
REBECCA B. LATIMER, PAUL VAN RIEL, 1996. "INTEGRATED SEISMIC RESERVOIR CHARACTERIZATION AND MODELING: A GULF OF MEXICO 3D CASE HISTORY", Stratigraphic Analysis Utilizing Advanced Geophysical, Wireline and Borehole Technology for Petroleum Exploration and Production, Jory A. Pacht, Robert E. Sheriff, Bob F. Perkins
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A quantitative, detailed description of reservoir architecture and properties, which honors all available well log, seismic, and geologic information, can strongly improve the economics of reservoir development and enhance production. Spatial distribution of reservoir properties can be determined by stepping through a workflow which starts where standard workstation seismic and geologic interpretation ends. In order to obtain the most accurate and detailed results, one must design a multidisciplinary workflow that quantitatively integrates well log, petrophysical and seismic information. The main steps are:
Seismic well calibration;
3D seismic lithology inversion;
3D geologic modeling, utilizing interpolated well control;
Detailed interpretation of reservoir stratigraphic units, using a seismic lithology inversion cube merged with the geologic model;
Estimation of reservoir parameters such as average porosity and net pay from the lithology cube.
Following this workflow through a Gulf of Mexico 3D case study shows how the reservoir’s stratigraphic and lithologic properties are more accurately determined than would be possible with standard seismic interpretation and seismic attribute analysis. The seismic lithology analysis allows for delineation of depositional systems tracts, which can be superimposed upon the seismic interpretation. The method also identifies lithologic changes away from well control. These results are directly related to reservoir properties and are used to support the optimization of the development drilling program.