COMPREHENSIVE EVALUATION OF SEALING ABILITY OF MUDSTONE CAP ROCK FOR XING 9 DEPLETED GAS RESERVOIR IN RECONSTRUCTING UNDERGROUND GAS STORAGE
LIN Jianpin1，JIA Shanpo1，2，LIU Tuanhui1，YAN Aihua1，XI Zengqiang1
(1. Exploration and Development Research Institute of Huabei Oilfield，CNPC，Renqiu，Hebei 062552，China； 2. Research center of Geomechanics and Geotechnical Engineering，Yangtze University，Jingzhou，Hubei 434023，China)
Abstract：Quality of cap rock is a critical factor controlling the effective accumulation of natural gas for underground gas storages. In view of this，the brittleness evaluation model of cap rock is set up based on the complete stress-strain curves through lab tests. In combination with physical sealing method and rock mechanics method，a modified sealing evaluation method of cap rock is proposed. Based on the classification of the influence factors and the analysis of cap rock for gas storage of depleted gas reservoir，the index suitability standards of cap rock evaluation for gas storage are put forward. Then taking the analytic hierarchy process，a layer structural model of sealing evaluation is built and the importance weights of 12 influence factors are calculated. Combined with the importance weights of influence factors，a formula is developed to calculate the synthetical appropriate value of cap rock. This method is used to evaluate the suitability of Xing 9 gas reservoir and evaluation result of cap rock is consistent with the expert opinions，which shows that this method is reasonable.
林建品1，贾善坡1，2，刘团辉1，闫爱华1，席增强1. 枯竭气藏改建储气库盖层封闭能力综合评价研究 ——以兴9枯竭气藏为例[J]. 岩石力学与工程学报, 2015, 34(S2): 4099-4107.
LIN Jianpin1，JIA Shanpo1，2，LIU Tuanhui1，YAN Aihua1，XI Zengqiang1. COMPREHENSIVE EVALUATION OF SEALING ABILITY OF MUDSTONE CAP ROCK FOR XING 9 DEPLETED GAS RESERVOIR IN RECONSTRUCTING UNDERGROUND GAS STORAGE. , 2015, 34(S2): 4099-4107.
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2015, Vol. 34 
