A-21 RESERVOIR CHARACTERIZATION – FROM PREDICTIONS OF FLOW TO MEASUREMENT OF FLOW BY USING 4-D SEISMICS R. MARSCHALL Schlumberger GmbH Geco-Prakla Reservoir Evaluation Seismic PO Box 510530 30635 Hannover Germany 1 Abstract: After a brief review of the general hydrogeological situation at a reservoir the types of reservoirs and the corres-ponding recovery methods are briefly reviewed. Based on this summary then the three basic types of 4-D seismic applications are discussed as there are: thermal methods segregated flow-methods and diffusive flow-methods. For all three methods the underlying acquisition geometry for the two surveys (which form a 4-D data base) is


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