Fracture detection with prestack seismic data in OVT domain:A case study of the Ordovician carbonate reservoir in ZG area of Tazhong district in Tarim Basin
DANG Qing-Ning1, CUI Yong-Fu1, CHEN Meng1, ZHAO Rui-Rui1, LIU Wei-Ming2, LI Yong-Jun1
1. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla 841000, China;
2. China National Oil Exploration and Development Corporation Institute(Northwest), Lanzhou 730020, China
Based on the full azimuthal and high density seismic data in ZG area of Tazhong district in Tarim Basin, the authors detected fractures through the P-wave azimuthal anisotropy with prestack seismic data in OVT domain.After migration in OVT domain, the seismic data which possess azimuth and offset information, are suitable for fast prediction of fractures and hence avoid waste of time.The authors examined different offset ranges and azimuths and the alterable seismic domain and then chose the offset in the range of 100~5500 m and 6 azimuth to predict the fracture.To analyze the relative impendence inversion of every azimuthal datum, the authors determined the fracture orientation and fracture density of carbonate reservoirs in Yingshan Formation.The results are largely consistent with the practical drill hole and can guide the study of well deployment, connectivity of cave-fracture and design of horizontal well.
党青宁, 崔永福, 陈猛, 赵锐锐, 刘伟明, 李勇军. OVT域叠前裂缝预测技术——以塔里木盆地塔中ZG地区奥陶系碳酸盐岩为例[J]. 物探与化探, 2016, 40(2): 398-404.
DANG Qing-Ning, CUI Yong-Fu, CHEN Meng, ZHAO Rui-Rui, LIU Wei-Ming, LI Yong-Jun. Fracture detection with prestack seismic data in OVT domain:A case study of the Ordovician carbonate reservoir in ZG area of Tazhong district in Tarim Basin. Geophysical and Geochemical Exploration, 2016, 40(2): 398-404.
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