Poststack interbed multiple suppression based on seismic interferometry
Ye Yueming1, Zhao Changlei1, Zhuang Xijin1, Sun Xiaodong2, Qian Jin3
1. Hangzhou Research Institute of Geology, PetroChina, Hangzhou, Zhejiang 310023, China;
2. School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266555, China;
3. Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong 266071, China
Abstract:Interbed multiple attenuation is always a challenge in seismic data processing. The conventional SRME can effectively predict surface-related multiples, but it cannot directly predict interbed multiples. Interface related interbed multiples can be predicted in prestack gathers based on seismic interferometry, which requires high single-noise ratio and regularized shot gathers. Based on the theory of seismic interferometry, we propose in this paper a method for interface related interbed multiple prediction and attenuation in poststack data. interbed multiples can be predicted on stack sections by three known wavefields, and then they can be eliminated from the stack sections by self-adapted deduction. Comparing with interbed multiple attenuation on prestack data, our approach requires fewer constraint conditions. Neither data regularization nor high single-to-noise ratio is needed. At the same time, it avoids the disadvantages of picking event at long offset. Model test and real data processing show the feasibility of the proposed method.
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