Seismic wave field modeling for dipping fracture medium with two groups of arbitrary included angle
Wang Yue-ying1,2,3, Sun Zan-dong1,2, Bai Hai-jun1,2
1. Lab for Integration of Geology and Geophysics (LIGG),Faulty of Natural Resource and Information Technology,China University of Petroleum,Beijing City 102249,China;
2. State Key Lab of Petroleum Resources and Prospecting,China University of Petroleum,Beijing City 102249,China
Abstract:The dipping fracture with two groups of arbitrary included angle can be easily founded in the nature,regarding the dipping fracture medium model with two groups of arbitrary included angle staggered-grid high-order finite-difference was used to conduct seismic wave field 2D3C numerical modeling in this paper.Based on Hudson theory and Bond matrix transformation the elastic coefficients of the fractured reservoir under the viewing coordinate system were obtained,and the difference between seismic wave field under constitutive coordinate system and seismic wave field under viewing coordinate system were correlated,the wave field characteristics of shot records with different azimuths,the wave field characteristics of azimuth gathers under different offsets,and the response characteristics on azimuth gathers when changing fracture inclined angle were analyzed.The studies above illustrates that anisotropic characteristics of the fractured reservoir is the integrated reflection of the fractures,and the anisotropic degree is not only related to the intensity of the fracture development,but also related to its complex degree.Through analyzing numerical modeling for azimuthally anisotropic media and wave field characteristics,theoretical foundation is laid for fracture inversion in azimuthally anisotropic media.
王月英, 孙赞东, 白海军. 两组任意夹角倾斜裂缝介质地震波场模拟[J]. 石油地球物理勘探, 2010, 45(1): 47-54.
Wang Yue-ying, Sun Zan-dong, Bai Hai-jun. Seismic wave field modeling for dipping fracture medium with two groups of arbitrary included angle. OGP, 2010, 45(1): 47-54.