摘要
中国作为北美之外最大的页岩气生产国,随着页岩气勘探开发的持续快速推进,在埋深3 500 m以浅的海相页岩区已经建成200×10^8 m^3的页岩气年产规模。未来全国埋深3 500 m以浅页岩气能否继续稳产上产、埋深超过3 500 m的深层页岩气的开发潜力如何,既是评价和判断未来中国页岩气资源开发潜力和发展前景等的前提,也是决定能否在川渝地区建成"天然气大庆"的关键。为此,通过总结中国页岩气理论认识和工程技术发展成果,分析页岩气资源的开发潜力,预判了未来的发展前景。研究结果表明:①在页岩气理论体系方面,明确了海相深水陆棚笔石黑色页岩形成条件及页岩气富集机理,建立了"甜点区"和"甜点段"地质理论,初步构建基于"人造气藏"的页岩气开发理论,建立了四川盆地南部地区深层优质页岩厚度大、保存条件好、发育微裂缝与超压的页岩气富集高产模式;②在页岩气工程技术方面,水平井多段压裂等关键工程技术实现了跨代发展,支撑了中国仅用6年时间就实现了页岩气年产100×10^8 m^3、其后又用2年时间实现了年产200×10~8 m^3的历史性跨越;③在页岩气资源方面,明确了四川盆地中浅层海相页岩气是产业发展的"压舱石",而深层海相页岩气则是未来产量增长的主体,以川南海相页岩为重点具备还可探明页岩气地质储量超6×10^12 m^3的资源条件,可以支持页岩气产量持续快速增长。结论认为,通过加快对于埋深3 500~4 000 m页岩气资源的开发,2025年全国页岩气年产量可以达到300×10^8 m^3;考虑到埋深4 000~4 500 m页岩气资源开发突破难度较大,2030年页岩气有望落实的年产量为350×10^8~400×10^8 m^3。
As the largest shale gas production country outside North America,China has built a yearly shale gas production scale of 200×10^8 m^3 in marine shale areas above 3500 m,with the continuous and rapid advancement of shale gas exploration and development.The continuous production stabilization and increase of shale gas above 3500 m and the development potential of deep shale gas below 3500 m all over the country in the future are not only the premise to evaluate and judge the development potential and development prospect of shale gas resources in China,but also the key to determine whether the"Natural Gas Daqing"can be built up in Sichuan-Chongqing area.By summarizing China’s theoretical understanding and engineering technological development achievements on shale gas,this paper analyzes the development potential of shale gas resources and predicts the future development prospect.And the following research results were obtained.First,as for the theoretical system of shale gas,the enrichment mechanism and the formation condition of shale gas in marine deepwater shelf graptolite black shale is clarified,the geological theory of"sweep spot area"and"sweet spot section"is established,the theory of shale gas development based on"artificial gas reservoir"is preliminarily set up,and the microfracture development and overpressure shale gas enrichment and high yield pattern of high quality deep shale in good conserved condition with great thickness in the southern Sichuan Basin is established.Second,as for shale gas engineering technology,cross-generation development of key engineering technologies(e.g.multi-stage fracturing of horizontal well)has been achieved,and with the support of which,China achieved a yearly shale gas production of 100×10^8 m^3 in just six years and realizes a historical leap of yearly production of 200×10^8 m^3 in two years.Third,as for shale gas resources,it is clarified that middle-shallow marine shale gas in the Sichuan Basin is the"ballast"of industrial development and deep marine shale gas i
作者
邹才能
赵群
丛连铸
王红岩
施振生
武瑾
潘松圻
ZOU Caineng;ZHAO Qun;CONG Lianzhu;WANG Hongyan;SHI Zhensheng;WU Jin;PAN Songqi(PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;National Energy Shale Gas R&D<Experimental>Center,Beijing 100083,China;PetroChina Exploration&Production Company,Beijing 10083,China)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2021年第1期1-14,共14页
Natural Gas Industry
基金
国家科技重大专项“四川盆地及周缘页岩气形成富集条件、选区评价技术与应用”(编号:2017ZX05035)。
关键词
页岩气
海相页岩气
深层页岩气
非海相页岩气
四川盆地
“天然气大庆”
开发潜力
年产气规模
Shale gas
Marine shale gas
Deep shale gas
Non-marine shale gas
Sichuan Basin
"Natural Gas Daqing"
Development potential
Yearly gas production scale
