1. School of Geosciences,China University of Petroleum,Qingdao 266555, China;
2. International Department of Shengli Geophysical Company,SINOPEC,Dongying 257084, China
According to the differences between angle gather data and multiscale and multi-direction characteristics of Curvelet transform, this paper proposes the utilization of angle fluid factor to discriminate different fluids. Models and real seismic data are used to test the method. The result is reliable, and the location and range of the reservoir can be satisfactorily obtained. In combination with other attributes, the method can provide better information for fine description of the reservoir. Making reference to cross-equalization methods of time-lapse seismic data, the wavelet cross-equalization method is used to equalize angle gather data. Then, Curvelet domain fluid anomaly separation technique is used to separate background field information (rock frame information) from fluid information, and the anomaly of the interesting layer can be obtained.
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