Application of VSP data in describing structural characteristics of salt cavern gas storage
LI Linlin1, SHANGGUAN Shuantong2, FU Jiangang1, LIU Xu2, HOU Wei3
1. New Resources Geophysical Exploration Division, BGP Inc., CNPC, Zhuozhou, Hebei 072751, China; 2. Second Geological Team (Dry Hot Rock Research Center), Hebei Coalfield Geology Bureau, Xingtai, Hebei 054000, China; 3. Hebei Gas Corporation Limited, Shijiazhuang, Hebei 050000, China
Abstract：The world's demand for natural gas is increasing. For the sake of ensuring energy security and regulating the seasonal contradiction between supply and demand,it is an advanced method to build underground gas storage. With the large-scale construction of salt cavern gas storage in China,the accurate analysis and evaluation of the target salt mine is the key to the successful construction of gas storage. During the construction of salt cavern gas storage in the Ningjin area,Hebei Province,it is difficult to describe the geological structure of underground salt bodies due to the lack of surface seismic data. Therefore,the paper proposes to use VSP data to eva-luate the geological conditions of salt cavern gas storage construction in Ningjin area. First,Zero-offset,Walkaway and Walkaround VSP data acquisition are deployed in this area. Through the processing of VSP data,the VSP corridor stack profile,Walkaway VSP imaging profile,Walkaround VSP data and their interpolated 3D data volume are obtained;The Zero-offset VSP data,Walkaway VSP imaging data,as well as Walkaround VSP three-dimensional interpolated data volume are comprehensively used to study the salt body in the exploration area from the point,line,plane,and body angles,describe the geometric shape and fault distribution of the salt body in the exploration area,and predict developing direction of the fracture. This achievement are of certain guiding significance for the construction of salt cavern gas storage in the Ningjin area.
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LI Linlin, SHANGGUAN Shuantong, FU Jiangang, LIU Xu, HOU Wei. Application of VSP data in describing structural characteristics of salt cavern gas storage. Oil Geophysical Prospecting, 2023, 58(2): 422-430.
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