Prestack four-parameter synchronous inversion method based on viscoelastic medium theory and its applications
LIU Hao-Jie1, CHEN Yu-Mao1, WANG Yan-Guang1, ZONG Zhao-Yun2, WU Guo-Chen2, HOU Qing-Jie1,3
1. Geophysical Research Institute,Sinopec Shengli Oilfield Company,Dongying 257022,China 2. School of Geosciences,China University of Petroleum,Qingdao 266580,China 3. Working Station for Postdoctoral Scientific Research,Shengli Oilfield,Dongying 257000,China
Prestack seismic data contain elastic and viscoelastic information such as P-wave velocity,S-wave velocity,density and absorption attenuation parameters,among which absorption attenuation property is particularly sensitive to reservoir physical properties and fluid properties.Based on the accurate Zoeppritz equation of viscoelastic medium and the theory of medium decomposition,the authors established the characteristic equation of P-wave reflection coefficient including P-wave velocity,S-wave velocity,density and absorption attenuation parameters.Furthermore,under the constraint of Bayesian inversion framework,the simultaneous inversion of prestack four parameters was realized.The reliability of the method was verified by the trial of forward model.Finally,the method was applied to oil and gas identification in the eastern offshore exploration area of the Shengli Oilfield.Compared with things of the fluid factor based on elastic medium,the absorption and attenuation parameters obtained by the four-parameter simultaneous inversion method can more accurately characterize the distribution of oil and gas.
刘浩杰, 陈雨茂, 王延光, 宗兆云, 吴国忱, 侯庆杰. 粘弹介质叠前四参数同步反演及应用[J]. 物探与化探, 2021, 45(1): 140-148.
LIU Hao-Jie, CHEN Yu-Mao, WANG Yan-Guang, ZONG Zhao-Yun, WU Guo-Chen, HOU Qing-Jie. Prestack four-parameter synchronous inversion method based on viscoelastic medium theory and its applications. Geophysical and Geochemical Exploration, 2021, 45(1): 140-148.
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