摘要
四川盆地是目前中国页岩气勘探开发的重点地区,也是最成功的地区.四川盆地页岩气资源勘探开发前景,将在较大程度上反映和影响中国页岩气未来的发展前景.通过全面总结近年来该盆地页岩气勘探开发的新进展,得出了以下认识：①四川盆地经历了海相、陆相两大沉积演化,发育了海相、海陆过渡相、陆相三类富有机质页岩,形成了震旦系陡山沱组、寒武系筇竹寺组、奥陶系五峰组—志留系龙马溪组、二叠系龙潭组、三叠系须家河组、侏罗系自流井组6套有利的页岩气富集层系;②深水陆棚相、集中段厚度大、热演化程度适中、正向构造背景下裂缝发育、储层超压是五峰组—龙马溪组页岩气富集的“五大”关键要素;③该盆地页岩气勘探开发仍面临资源富集“甜点区”及资源潜力不清、深度超过3 500 m的深层页岩气勘探开发技术不成熟等两大挑战.结论认为：四川盆地已在侏罗系、三叠系和寒武系初步实现了页岩气发现,在奥陶系—志留系实现了工业化突破和初步规模生产,未来发展前景较好;该盆地页岩气资源可以实现经济有效勘探开发,预期可实现年产量300×108～600×108 m3;对该盆地页岩气资源勘探开发将为中国页岩气资源规模发展提供重要的理论与技术支撑.
The Sichuan Basin is one of the highlighted areas of shale gas exploration and development and a great success there proved a bright prospect of shale gas discovery and production and will have a great influence to some degree on the future shale gas development in China.Through an overall review on the new progress in shale gas exploration and development in the Sichuan Basin,we concluded the following findings.First,the Sichuan Basin has experienced the depositional evolution of marine and terrestrial facies,and three types of shales rich with marine,transitional,and terrestrial organic matters were well developed and six sets of favorable shale gas enrichment strata：the Sinian Doushantuo Fm,the Cambrian Qiongzhushi Fm,the Ordovician Wufeng-Silurian Longmaxi Fm,the Permian Longtan Fm,the Triassic Xujiahe Fm,and the Jurassic Zhiliujing Fm.Second,the five key elements for shale gas accumulation in the Wufeng-Longmaxi Fm are deep-water shelf facies,greater thickness of organic-rich shales,moderate thermal evolution,abundant structural fractures,overpressured reservoirs,etc.Third,the sweet spots and potential prospect of shale gas are still unveiled there; and the technologies are not mature enough for the development of shale gas resources below 3 500 m.In conclusion,a bright future will be seen from the discovery of shale gas in the Jurassic,Triassic and Cambrian Fms and the preliminary industrial scale production in the Ordovician-Silurian Fm in the Sichuan Basin; commercial shale gas production will be possibly achieved there with a predicted annual gas output of 30-60 billion m3 ; and shale gas E ＆ P experiences in this basin will provide valuable theoretical research and technical support for commercial shale gas development in China.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2014年第12期1-15,共15页
Natural Gas Industry
基金
国家油气重大专项"页岩气重点地区资源评价"(编号:2011ZX05018-001)
"全球剩余油气资源研究及油气资产快速评价技术(二期)"(编号:2011ZX05028)
国家重点基础研究发展计划(973计划)项目(编号:2013CB228001)
关键词
四川盆地
页岩气
勘探开发
新进展
富集条件
发展前景
面临挑战
年产量
Sichuan Basin
shale gas
exploration and development
new process
enrichment condition
development prospect
challenge
annual gas output
