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Patent
CA 2177771
A method of modeling subsurface reservoir conditions deals with non-uniqueness of seismic reflection signals with respect to reservoir conditions by proposing and then comparing both seismic and lithologic data for forward model sites to select the most likely model for each site. Forward modeling techniques are used to build a synthetic seismic trace catalog, which includes a range of corresponding pseudo-logs for reservoir characteristics that could reasonably exist within a defined region. Then each synthetic seismic trace in the catalog is compared against every real seismic trace, and a number (e.g., 10 to 50) of synthetic traces is selected for association with each real trace that best match the real trace. Finally, the pseudo-logs corresponding to the number of selected synthetic seismic traces for each forward model site are compared to the pseudo-logs selected for adjacent sites to select the most lithologically coherent pseudo-log at each site for use in generating a model display of reservoir characteristics.
Butler Edgar L.
Neff Dennis B.
Runnestrand Scott A.
Osler Hoskin & Harcourt Llp
Phillips Petroleum Company
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