西南石油大学学报(自然科学版)

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Study on Site Selection and Evaluation of Underground Gas
Storage in Salt Cavern

Wanyan Qiqi1,2,3*, Ran Lina2,3, Han Bingjie2,3, Cai Maojia4, Li Qi5   

  1. 1. School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China;2. Langfang Branch of Research
    Institute of Petroleum Exploration and Development,PetroChina,Langfang,Hebei 065007,China;3. CNPC Key Laboratory of Oil & Gas
    Underground Storage Engineering,Langfang,Hebei 065007,China;4. Exploration Company,Dagang Oilfield,Dagang,Tianjin 300280,China;
    5. West-to-East Gas Pipeline Company,PetroChina,Pudong,Shanghai 200122,China
  • Online:2015-02-01 Published:2015-02-01

Abstract:

The underground gas storages in salt caverns has the advantages of high injection-production ratio,large accommodation
capacity and low cushion gas content with recycling system. As the development of China′s natural gas industry,
more underground gas storages in salt cavern which play a signigicant role in natural gas reserves and peak shaving will be
built and put into operation. However,China′s underground gas storages construction lags behind,only one underground
gas storages in salt caverns completed and put into operation. The system of evaluation and optimal site selection of underground
gas storages in salt caverns has not formed,which severely restricted the development and construction of underground
gas storages in salt caverns in China. Based on the characteristics of underground gas storage in salt cavern,we studied the
optimization principle of storage site and then comprehensively evaluate the underground gas storage site. The optimization
evaluation index for underground gas storage site has been elaborated systematically and quantitatively in respects of structural
characteristics,development of salt deposit,buried depth of salt layers,thickness of salt beds,property and thickness of cap
rock,tightness,condition of old wells and geographic location,which provides possible ways and theories to evaluate and
optimize the underground gas storage site selection.

Key words: underground gas storage, salt cavern, storage site, optimal selection, geological evaluation