中国石化深层、常压页岩气勘探开发进展与展望

Development progress and outlook of deep and normal pressure shale gas of SINOPEC

近十几年以来,随着页岩气勘探开发理论技术水平的提高,我国实现了南方上奥陶统五峰组—下志留统龙马溪组海相页岩气商业化开发,并向深层、复杂构造区和新层系拓展。为进一步推动页岩气高效勘探开发,系统梳理了中国石化页岩气勘探开发新进展,并对国内页岩气发展趋势进行分析。研究结果表明:①高质量建成涪陵页岩气国家级示范区,创新形成了海相页岩气立体开发关键技术体系;②实现南川东胜、白马区块常压页岩气规模效益开发,构建了背斜型、单斜型、反向逆断层遮挡型、残留向斜型四种页岩气聚散模式,形成精细分区,差异化开发新模式,初步建成常压页岩气开发低成本技术体系;③初步落实川东南盆缘深层万亿方规模阵地,创新形成海相深层页岩气“超压富气”模式,初步形成4000~4500 m深层页岩气压裂技术体系;④相继在元坝、普光侏罗系,红星、普光二叠系、井研—犍为寒武系取得重大突破;⑤未来实现页岩气大突破和大发展离不开勘探开发理论技术的创新攻关,必须坚持勘探开发一体化、地质工程一体化、技术经济一体化,需要充分认识深层、常压、新层系页岩气地质特征的复杂性,还需要政策扶持等。

In the past decade,with the improvement of shale gas exploration and development theory and techno-logy,the commercial development of marine shale gas from Ordovician Wufeng to Silurian Longmaxi formations in southern China has been achieved,and the target of shale gas exploration and development is gradually shifting towards shale gas of deep and complex structural areas and new formations.In order to further promote efficient exploration and development of shale gas,a systematic review was conducted on the recent exploration and deve-lopment progress of SINOPEC shale gas and an analysis was conducted on the development trend of shale gas in China.The research results indicate that:①The high-quality Fuling National Shale Gas Demonstration Zone has been built and a key technology system for three-dimensional development of marine shale gas has been innovatively formed.②The large-scale and efficient development of atmospheric shale gas in Dongsheng and Baima blocks of Nanchuan has been realized,and four shale gas accumulation and dispersion models have been constructed:anticline,monocline,reverse fault blocking,and residual syncline.A fine zoning and differentiated development model and a low-cost technology system for atmospheric shale gas have been preliminarily formed.③The deep large-scale fields of trillions of square meters in southeastern Sichuan basin edge have been preliminarily implemented,an“overpressure rich gas”model of marine deep shale gas has been innovatively formed,and a fracturing technology system of deep shale gas in the deep range of 4000-4500 m has been preliminarily formed.④Major breakthroughs have been made successively in Jurassic of Yuanba and Puguang,Permian of Hongxing and Puguang,and Cambrian of Jingyan and Qianwei.⑤The future breakthrough and development of shale gas cannot be achieved without innovative research on exploration and development theory and technology.The integration of exploration and development,geological engineering,and technology and economy must be adhered to.The complexity of deep,normal-pressured,and geological characteristics of new shale gas formations should be fully understood.In addition,policy support is also required.