Cross-equalization based on pseudo-multichannel matching in time-lapse seismic
Li Zhina1, Zhang Min1, Li Zhenchun1, Wang Yihui1, Xu Hui2, Fu Jinrong2
1. School of Geosciences, China University of Petroleum(East China), Qingdao, Shandong 266580, China;
2. Geophysical Research Institute, Shengli Oilfield Branch Co., SINOPEC, Dongying, Shandong 257022, China
Abstract：In order to improve the accuracy of data matching, and better eliminate seismic response difference between data of different periods in non-reservoir area, we introduce a pseudo-multichannel matching filter for cross-equalization instead of the least square matching method.Pseudo-multichannelmatching algorithm is used to constrain time, amplitude, frequency, and phase. The model channel may be expressed as a function of time, amplitude, frequency, and phase. After derivation, the model channel can be reduced to an expression of four channels by time, amplitude, frequency, and phase as constraints at same time. The proposed method can gain higher matching precision than conventional matching filters. And it can better reflect dynamic changes of reservoirs. Numerical and real data examples prove the effectiveness of the proposed method.
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