3D Anisotropic Elastic Wave Illumination and Target-oriented Visibilty Analysis

3D wave equation illumination analysis utilizing the prior model information adequately is a good way to design acquisition geometry and reduce the high risk and costs of 3D seismic exploration. In this paper, the anisotropic elastic wave illumination method is proposed to improve the exploration accuracy of complex area with anisotropy which is usually found in lithosphere. On the basis of mathematical statistics, we define the whole illumination intensity of target zone excited from one shot and scattered to one receiver as the visibility of the single shot-receiver pair. Then we can obtain the visibility of acquisition geometry for specific subsurface structure during the procedure of illumination analysis. This illumination based visibility analysis method quantify the illumination contribution of different shot-receiver pairs to objective imaging, which is a good way to optimize the seismic survey and improve the exploration accuracy without increasing exploration costs.