Application of fracture prediction technology in shale-oil exploration in Mahu area
YE Di1, XI Yuxiao1, CHENG Zhiguo1, CHEN Yong1, QIN Liming1, DING Dawei2
1. Department of Geophysics, Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Urumqi, Xinjiang 830013, China; 2. Research & Development Center, BGP Inc., CNPC, Zhuozhou, Hebei 072750, China
Abstract：A large number of natural fractures are deve-loped in shale-oil reservoir of the Permian Fengcheng Formation in the Mahu area, Junggar Basin. The development degree of fractures determines the production of a single well. However, it is difficult to accurately predict the scale, development characteristics, and distribution law of the fractures only by post-stack seismic data. On the basis of GeoEast software, this paper studies a single well and determines fracture development sections by rock core and imaging data. In addition, making full use of wide-azimuth pre-stack and post-stack seismic data, five-dimensional seismic interpretation technology, the study identifies large-scale faults and small-scale micro-fractures, clarifies fracture distribution law, and predicts fracture strength and direction. Finally, three fracture development areas in the study area are comprehensively predicted. The fracture prediction results provide certain support for the deployment of shale-oil horizontal wells in the Mahu area.
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