The Analysis of Instantaneous Polarization Attribute in Crosswell Seismic Wave Field
In the stage of oilfield development, the fractures of clasolite reservoir begin to develop after the process of fracturing and water flooding.At the same time, the lateral heterogeneity has the significant changes, and this situation will cause the abnormal changes of many seismic attribute parameters.Based on theoretical analysis of polarization attributes of three-component borehole seismic wave field, which attributes include the long axis, short axis, azimuth and polarization ratio, we can get the conclusion that it is possible to have some abnormal changes for those attributes.In this paper, we use the crosswell three-component wave field which is simulated by the anisotropic medium wave equation forward modeling, to calculate the instantaneous polarization attribute of the pre-stack seismic data,and implement the imaging process based on the method of wave field imaging.It turn out that there are some larger differences in polarization attribute between the horizontally layered model and fault model.It is obvious to see the characteristic of layered anisotropy.In the fault model, the fault point abnormity of the attribute in polarization ratio and ellipsoid ratio has the significant features.And this is used as the identification symbol of the fracture development zone.
polarization ratio ellipsoid ratio attributes imaging anisotropy fault
Dai Yu Yuan Sun Dong Li Hui Wang Guangyi Hu
College of Geology Engineering and Geomatics Changan University Xian, China Development Institute of CNOOC Research Institute CNOOC Beijing, China
国际会议
北京
英文
341-344
2016-06-27（万方平台首次上网日期，不代表论文的发表时间）