3D PP-PS joint inversion method and application in anisotropic medium
Li Lu-ming1,2, Luo Xing-xian1, Wang Ming-chun1, Kong Xuan-lin1, Zhou Huai-lai1
1. State Key Lab of Reservoir Geology and Development Engineering,Chengdu University of Technology,Chengdu City,Sichuan Province 610059,China;
2. Education Ministry Key Lab of Earth Prospecting and Information Technology,Chengdu University of Technology,Chengdu City,Sichuan Province 610059,China
Abstract：In order to raise precision in reservoir prediction,3D3C seismic data and previous processing results were used,based on elastic wave propagation theory in anisotropic medium,multi-wave accurate amplitude characteristic equation (Amplitude Versus Angle) was studied,as a result the PP-PS joint pre-stack lithology inversion method for 3D anisotropic medium was developed.The NMO gathers were used in this method,5 lithologic parameters were jointly solved in one equation so that 5 inversion parameters were obtained at the same time.In order to keep the independence of the inversion parameters,P wave velocity,Share wave velocity,density,and 2 other anisotropic parameters of the formation can be directly inverted,then 13 lithologic and elastic parameters including elastic parameter,elastic impedance,elastic impedance gradient and so on were calculated and were used to identify and describe the lithology and fluid.The PP-PS joint pre-stack inversion method can improve the reliability and accuracy of the inversion,3D multi-wave seismic data processing of the field data proved the suitability of the method.
李录明, 罗省贤, 王明春, 孔选林, 周怀来. 各向异性介质三维纵横波联合叠前反演方法及应用[J]. 石油地球物理勘探, 2010, 45(1): 60-65.
Li Lu-ming, Luo Xing-xian, Wang Ming-chun, Kong Xuan-lin, Zhou Huai-lai. 3D PP-PS joint inversion method and application in anisotropic medium. OGP, 2010, 45(1): 60-65.
