Research and application of seismic forward simulation technology in deep reflection seismic profile detection
WANG Guang-Wen1,2(), WANG Hai-Yan1,2(), LI Hong-Qiang3, LI Wen-Hui1,2, PANG Yong-Xiang4
1. Lithosphere Center,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China 2. Deep Earth Dynamics Key Lab of Ministry of Natural Resources,Beijing 100037,China 3. Chinese Academy of Geological Sciences,Beijing 100037,China 4. CNPC Logging Company Limited,Tianjin Branch,Tianjin 300280,China
Seismic wave forward modeling technology is widely used in shallow exploration.This method can combine geological model and seismic model organically to verify and guide the acquisition,processing and interpretation of seismic data.The deep reflection seismic profile detection technology based on the oil reflection seismic technology has been very mature after decades of development and application.But up to now,the application of seismic wave forward modeling in deep reflection seismic profile is very insufficient.In this paper,the deep reflection seismic profile across Sichuan Basin was used to carry out forward modeling.By comparing and fitting the horizon of forward simulation data and actual seismic data,the parameters such as velocity and horizon were constantly modified,and the final depth domain geological model was established,which provides more accurate stratigraphic information such as crustal thickness and Moho depth for structural profile.Through the geological model in depth domain,it is revealed that the angle of Neoproterozoic paleosubduction in the northwest margin of Yangtze plate was about 30 °,and the depth of subduction reached 60 km.
王光文, 王海燕, 李洪强, 李文辉, 庞永香. 地震正演技术在深反射地震剖面探测中的应用[J]. 物探与化探, 2021, 45(4): 970-980.
WANG Guang-Wen, WANG Hai-Yan, LI Hong-Qiang, LI Wen-Hui, PANG Yong-Xiang. Research and application of seismic forward simulation technology in deep reflection seismic profile detection. Geophysical and Geochemical Exploration, 2021, 45(4): 970-980.
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