Fracture detection in volcanic rocks using discrete frequency coherency cubes on full-azimuth seismic data
Chen Bo1,3, Sun De-sheng2, Zhu Xiao-min1, Ling Yun2, Gao Jun2, Lin Ji-xiang2
1. College of Earth Resources and Information, China University of Petroleum (Beijing), Beijing 102200, China;
2. Geophysical Reservoir Research Center, BUP Inc, CNPC, Zhuozhou, Hebei 072757, Chlna
Abstract：Tiny fault is not obvious in full-frequency seismic sections,but rather clear in single-frequency seismic sections.So it is necessary to adopt the discrete frequency coherency cube technique for tiny fault interpretation.Based on the combination mono-frequency data interpretation and signal reconstruction technique,this work provides a discrete frequency coherency cube technique.The fractures in volcanic rock reservoir of XS well-block is detected by this method.The result shows that some unrecognized tiny faults and fracture zones in conventional seismic data are identified on discrete frequency coherency cube.The fractures detected by high-frequency coherency cube are more obvious and accurate.Reconstructed coherency cube shows more information about fractures than conventional cube,and is consistent with the results of HTI anisotropy fracture detection.
