天然气工业2025，Vol.45Issue(5)：87-101,15.DOI:10.3787/j.issn.1000-0976.2025.05.008
页岩气功勋井焦页1HF增强型体积压裂突破十三年回顾与启示
Thirteen-year review and insights of ESRV fracturing in shale gas reservoirs:Breakthroughs from the pioneer well JY1HF
摘要
Abstract
Well JY1HF is a discovery well and a pioneer well in the Fuling Gas Field,which is the first commercially developed shale gas field after North America.In order to enable the industry to understand China's independent innovation and iterative integration process of shale oil and gas fracturing,and to create a new quality productivity for the shale revolution,this paper systematically reviews the development and application of enhanced stimulated reservoir volume(ESRV)fracturing technology in Well JY1HF,analyzes its geological,engineering and production characteristics,and clarifies key theories and technologies(e.g.fracturing mechanism),their implications and next research directions.The following results are obtained.First,in Well JY1HF,high-quality deep-water shelf shale is developed with favorable roof,floor and preservation conditions,good brittleness,moderate clay mineral content,undeveloped natural fractures,developed bedding fractures,and significant stress contrast,and its horizontal section is 1 007.9 m long,mainly running in the middle and upper horizons of Longmaxi Formation.In the process of fracturing,the viscosity of fracturing fluid and the net pressure within the fracture are increased,and mechanically weak parts are fractured,such as bedding fracture,and combined with hydraulic fractures in brittle shale,complex fracture network can be formed in spite of large stress contrast.Second,as for Well JY1HF a proppant combination of 100-mesh ceramic,40/70 and 30/50 resin-coated sand,and high-efficiency variable-viscosity slickwater are adopted,and ESRV fracturing is innovatively implemented,like increasing net pressure,activating bedding fractures,controlling the near wellbore fractures and extending the far ones,controlling liquid intensity and increasing proppant intensity,and varying viscosity,pumping rate and sand concentration.The fracturing operation involves 15 stages of 36 clusters,with fracturing fluid of 18 716 m3 and proppant of 1 551 t,at the injection rate of 8-12 m3/min.The friction reduction rate of slickwater is 78％,and the maximum sand concentration is 27％.This well takes the lead in obtaining stable and high-yield gas flow and realizing strategic breakthrough.After experiencing two stages,i.e.,stable production with pressure decline,and production decline with constant pressure,it has cumulative natural gas production of about 1.8×108 m3 and fracture-controlled recovery factor exceeding 50％,which demonstrates and leads the general high yield of shale gas wells in Jiaoshiba Block and the efficient development of Fuling Shale Gas Field.Third,fracturing beddings to promote fracture complexity,controlling liquid and increasing proppant intensity to enhance conductivity,and varying viscosity and expanding SRV to increase production rate are the key technologies of ESRV fracturing,which breaks through the traditional understanding of shale fracturing that undeveloped natural fractures and large stress contrast make it difficult to form complex fractures,and enriches the fracturing theories.ESRV fracturing and efficient variable-viscosity slickwater have become the worldwide standard practices of unconventional oil and gas fracturing.In conclusion,the breakthrough in the high yield of Well JY1HF and the high and stable production of Fuling Gas Field are the typical practical cases under the guidance of binary enrichment and ESRV fracturing theories and technologies for shale gas,exhibit the resource development capacity and technological level of China's shale gas horizontal section of 1 000 m long with EUR of(2-3)×108 m3,and can provide demonstration and reference for China's independent innovation of shale revolution.关键词
四川盆地/页岩气/功勋井/焦页1HF/ESRV压裂/回顾/启示Key words
Sichuan Basin/Shale gas/Pioneer well/Well JY1HF/ESRV fracturing/Review/Implication分类
能源科技引用本文复制引用
贾长贵..页岩气功勋井焦页1HF增强型体积压裂突破十三年回顾与启示[J].天然气工业,2025,45(5):87-101,15.基金项目
国家科技重大专项课题"3000型压裂车组大型压裂酸化先导试验"(编号:2011ZX05048-006-002)、中国石化科技攻关课题"页岩气网络压裂机理及设计方法研究"(编号:P11013)、中国石化先导试验项目"元坝/涪陵页岩压裂技术先导试验"(编号:YTXD-PT1201D)和"涪陵地区页岩气压裂技术设计方案优化研究"(编号:YTXD-PT1308D). （编号:2011ZX05048-006-002）
