中国地下储气库建设20年回顾与展望

地下储气库是天然气供应链中的重要组成部分,在中国天然气调峰安全保供中发挥了重要作用。以1999年大港大张坨储气库全面建设为标志,回顾了中国地下储气库历经从无到形成大规模产业的20年发展历程,建成了27座储气库、调峰能力超过100×108 m3、授权发明专利100多项、软件著作权20多项、制定标准15项、出版专著20多部。重点梳理了中国地下储气库建设取得的科技创新成果,其中具有代表性的技术成果主要包括:复杂断块、复杂流体、复杂岩性、深层强非均质储层条件下的储气库选址模式与库址评价技术,复杂地质条件储气库圈闭动态密封性评价技术,超低压防漏堵漏与储层保护、交变应力下井筒密封为核心的钻完井技术,地面高压大流量注采核心技术及其装备,地下储气库地层-井筒-地面"三位一体"风险管控系统等。结合中国地下储气库20年的建设经验与中国现行的行业政策,明确了中国地下储气库未来发展的机遇与挑战。

Review on 20 years’ UGS construction in China and the prospect

Underground gas storage(UGS)is one important part of natural gas supply chain,and it plays an important role in the peak shaving,security and supply support of natural gas in China.In this paper,the 20 years’development history of China’s UGSs from zero to large-scale industry was reviewed with the overall construction of the Dazhangtuo UGS of the Dagang Oilfield in 1999 as a mark.In this period,27 UGSs were built up with the peak shaving capacity more than 100×108 m3,over 100 invention patents and over 20 software copyrights were authorized,15 standards were formulated and over 20 monographs were issued.Then,the technological innovation achievements obtained in the UGS construction in China were mainly described,including 10 typical technological achievements,e.g.the UGS site selection mode and evaluation technology in the situations with complex fault block,complex fluid,complex lithology and strong-heterogeneity deep reservoir,the evaluation technology for the dynamic sealing performance of UGS trap with complex geological conditions,the drilling and completion technology with the ultralow-pressure lost circulation control and reservoir protection and the wellbore sealing under alternating stress as the core,the key technology and equipment for the surface injection and production at high pressure and large flow rate,and the"three-in-one"risk control system of UGS formation-wellboresurface.Finally,based on China’s 20 years of UGS construction experience and China’s current industry policies,the opportunities and challenges of the future UGS development in China were clarified.