Research of geological model-constrained FWI and application in complex fault-block zones
ZHANG Ziliang1,2, LI Zhenchun1, ZHANG Kai1, ZHAO Shuo1, WANG Feiyi1, Wu Dongying3
1. School of Geosciences, China University of Petroleum(East China), Qingdao, Shandong 266580, China; 2. Key Laboratory of Sedimentary Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao, Shandong 266580, China; 3. Geological Research Institute of Daqing Yushulin Oilfield Co., Ltd. Daqing, Helongjiang 163000, China
Abstract：A high-precision velocity model can be built through full waveform inversion,but the inversion result is not ideal in a complex fault-block zone because of low S/N radio and limited frequency band.Based on the conventional FWI theory,this paper proposes a model-constrained objective functional formula which constrains full waveform inversion through seismic interpretation.Model and field data show that the model-constrained FWI can provide the velocity field of a complex fault-block zone with high precision.It can improve the image of a complex fault-block zone.
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