METHOD FOR ANALISING SEISMIC TRACES USING A STATISTICAL CALIBRATION TECHNIQUE FOR DEDUCTION OF GEOLOGICAL CHARACTERISTICS

摘要

The method applies to an underground formation for which geological data are available from core drillings or logs from wells (W1-Wk) made therein, and from seismic data obtained, for example, by means of a 3D type reflection seismic exploration campaign. The method uses a statistical calibration technique with statistical standardization obtained by reconciliation of local geological data (measured in the wells) with seismic attributes read from seismic traces (RW1-RWk) obtained in the immediate vicinity of each well. This calibration gives an empirical relation which can be applied to all seismic traces for the field to infer the associated geological characteristics, thus giving the benefit of a much denser spatial coverage than that possible through seismic exploration. Application, for example, to a reservoir containing petroleum effluents.