Technical basis and development idea for the construction of"Gas Storage Capacity in Southwest China"
In order to ensure national safe and stable supply of natural gas,the National Energy Administration launched the"Gas Daqing"construction project of 100 billion cubic meters level in the Sichuan-Chongqing area in 2019,which raises the Sichuan Basin's natural gas storage&peak shaving and strategic emergency supply guarantee capabilities to the national strategic safety level.During the"14th Five-Year Plan"period,CNPC has set the strategic goal of building a"Southwest China Gas Storage Center",has been actively tackling various technical difficulties in the construction of underground gas storage(UGS),and has preliminarily formed the construction pattern of"Southwest China Gas Storage Center".After analyzing the challenges to the UGS construction in the Sichuan Basin,this paper systematically summarizes CNPC's achievements in development planning,construction status and technological progress in the Sichuan Basin in the past 17 years,and points out the specific research direction for the construction of"Gas Storage Capacity in Southwest China".And the following research results are obtained.First,the Sichuan Basin is rich in natural gas resources,and there are complete pipeline network facilities interconnected with the national natural gas pipeline network,which can provide a solid foundation for the UGS construction in the Sichuan Basin.Second,a"ten-index"site selection system for complex gas reservoirs in the Sichuan Basin is formed,and complete UGS site selection technologies are established.Third,seven characteristic technologies for UGS construction and operation are formed,and the main technology series for rebuilding UGSs from carbonate gas reservoirs are improved.Fourth,the first domestic integrity management evaluation technology system of UGS geological body,well and surface is established,which ensures the safe and smooth operation of UGSs.In conclusion,to support the construction of the national"Gas Daqing"of 100 billion cubic meters level,this paper puts forward the concept of constructing"Gas Storage Capacity in Southwest China",the core of which is taking the enterprise-level"Southwest China Gas Storage Center"preliminarily built by PetroChina as the foundation to break out of the UGS construction mode of a single oil company and establish a government-led and coordinated,cross-enterprise UGS collaborative construction,sharing and co-operation mechanism,so as to promote the overall construction of gas storage capacities in the Sichuan Basin,and providing an assurance of the national natural gas energy security.
Gas storage capacity in southwest ChinaSichuan BasinUnderground gas storageComplex gas reservoir conditionsSite selectionIntegrity management
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