›› 2014, Vol. 35 ›› Issue (4): 1194-1202.

• Numerical Analysis • Previous Articles     Next Articles

Application of variable weight theory and relative difference function to evaluating stability of salt cavern for underground gas storage

LI Hao-ran1，YANG Chun-he1, 2，CHEN Feng1，MA Hong-ling1，JING Wen-jun3，XU Yu-long1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering of Ministry of Education, Chongqing University, Chongqing 400044, China; 3. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong 266555, China
  • Received:2013-05-07 Online:2014-04-10 Published:2014-04-18

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Abstract: The underground gas storage in salt caverns, mined by drilling and water dissolving solution, has low visibility and high difficulty of cavern form controllability, so it is a very significant measure to carry out scientific stability evaluation on deformed gas storage for ensuring its safe operation. In this study, the variable weight theory and relative difference function are introduced to build the assessment model which can be suitable for salt cavern stability assessment. Based on the sonar data of salt cavern shape, the 3D model is built up firstly in numerical simulation calculation, and the simulation results are used as the marking standard of relational assessment index. This model is applied to the stability assessment process of some salt cavern in Jintan; and improving measures for safety are carried out on the basis of assessment results. By a comparison of these results with some others, it is shown that the stability assessment model is more reasonable, as the evaluation index weight has been recalculated by variable weight theory; and this method has relatively better applicability in cavern stability assessment of gas storage in salt cavern.

Key words: variable weight, relative difference function, salt cavern gas storage, deformed cavern, stability evaluation

CLC Number: 

  • TU 45
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