Automatic composition technique of fault polygon based on horizon interpretation
Wang Zhao-hu1,2, Liu Cai1, Wang Jian-min2, Zhang Xiang-jun2, Wang Yun-qing2, Tang Shi-wei3
1. Earth Exploration and information Technology Institute,Jilin University,Chang chun City,Jilin Province,130026,Shina;
2. Geophysical Prospecting Company of Drilling Engineering Group,Daqing Oil Administration,Daqing City,Heilongjiang Province,163357,China;
3. College of Computer and Information Technology, Daqing Institute of Petroleum, Daqing City, Heilongjiang Province, 163318, China
Abstract：The automatic composition of fault polygon based on horizontal slice of horizontal coherent volume has been become mature day by day, and his precision depends on the quality of coherent volume processing. Since abnormal information of coherent volume does not totally reflect the fault, it is difficult to use composed fault polygon picked up from the horizontal slice of horizontal coherent volume for preciously drawing the structural map. For that reason, the paper presented using time attribute data of horizon interpretation to pick up the fault and automatically form fault polygon file, and further to draw structural map preciously. The method is able to not only avoids pickup error existed in hand fault polygon composition, but also greatly improves the interpretation efficiency. The accurate automatic composition of fault polygon can be implemented in 3D seismic 4*4 CDP interpretation grid, and accuracy can reach to 98%.
