Time-variant wavelet extraction and seismic reflectivity inversion based on basis pursuit
YAO Zhen'an1, SUN Chengyu2, LI Hongxing1, YANG An'gen3
1. Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology, Nanchang, Jiangxi 330013, China; 2. School of Geosciences, China University of Petroleum(East China), Qingdao, Shandong 266580, China; 3. National Pilot Laboratory for Marine Sciences and Technology(Qingdao), Qingdao, Shandong 266237, China
Abstract:Seismic data are nonstationary because of noise contamination and energy attenuation during wave propagation,which means that the frequency spectrum of seismic signals changes from shallow to deep formations.In order to capture the non-stationary of seismic data,a time-variant wavelet extraction method is proposed using basis pursuit spectral decomposition and generalized seismic wavelet,in which basis pursuit spectral decomposition would supply high resolution time-frequency spectrum for better time-variant wavelet extraction.Based on time-variant wavelets,wavelet kernel matrix and wave dictionary are constructed,and basis pursuit seismic inversion is executed at last.Field data test shows that the proposed scheme achieves better data resolution,more effective well-to-seismic calibration,better geological continuity,and clearer geological details.
姚振岸, 孙成禹, 李红星, 杨安根. 基于基追踪的时变子波提取与地震反射率反演[J]. 石油地球物理勘探, 2019, 54(1): 137-144.
YAO Zhen'an, SUN Chengyu, LI Hongxing, YANG An'gen. Time-variant wavelet extraction and seismic reflectivity inversion based on basis pursuit. Oil Geophysical Prospecting, 2019, 54(1): 137-144.
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