Characteristic structural interpretation and reservoir prediction in Shuangyushi Area,Northwest Sichuan
LYU Wenzheng1,2, CHEN Xiao2, GUAN Xu2, ZOU Dingyong2, HUANG Tianjun2, YANG Guangguang2
1. Southwest Petroleum University, Chengdu, Sichuan 610500, China; 2. Research Institute of Exploration and Development, Southwest Oil and Gas Field Company, Pe-troChina, Chengdu, Sichuan 610041, China
Abstract：A group of carbonate rock dolomite reservoirs of Lower Permian Qixia Formation in the Beiyushi Area,Northwest Sichuan Basin are lithologic tectonic-lithologic composite-trap gas reservoirs.The reservoirs are jointly controlled by sedimentary facies and dolomite.Our study area is located in the front of the Longmen Mountain fault zones,which is characterized by well-developed faults,thin beds,deeply buried targets,and unclear seismic responses.It is very difficult to identify this kind of reservoirs.To overcome the problems,we conduct the research with interpretation tools provided by GeoEast System.Faults are identified with structure-oriented filtering and coherence attribute.The Qixia group platform-marginal facies is characte-rized with the paleo-geomorphology analysis.The qualitative and quantitative reservoir predictions are carried out with attribute sensitivity analysis and seismic inversion,which will provide favorable zones for the subsequent exploration and development in the area.
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