Analysis on seismic wave illumination of wave equation based on Shengli typical geologic model
Shan Lian-yu1,2,4, Lu Hong1, Kuang Bin2, Wang Hua-zhong3, Shen Cai-yu2, Xu Xue-ping2
1. Institute of Geology and Geophysics, Chinese Academy of Science, Beijing City, 100029, China;
2. Geophysical Research Institute of Shengli Oil Ltd, Dongying City, Shandong Province, 257022, China;
3. School of Ocean and Earth Science, Tongji University, Shanghai City, 200092, China
Abstract：Seismic wave illumination analysis technique takes seismic wave transmission theory as basis, carries out geometry design oriented to special geologic target to get best illuminated seismic data and further obtain optimum imaging result. The paper defined optimum illuminated data volume and conception of optimum illumination, pointed out that there exists objectively the optimum geometry for special velocity field and goal of design of optimum geometry is to find out the most approximation to the best geometry objectively existed. Based on typical geological model in Shengli Oilfield, the paper studied wave equation illumination, analyzed the forming reason of illuminated shadow and discussed the characters and application realm of illumination by one-way and two-way waves in combination with analyzing the experimental results of model data, pointing out that illumination by one-way wave has computational superiority and illumination by two-way wave can better preserve the feature of wave propagation.
