涪陵焦石坝区块水平井组拉链压裂实践与认识
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摘要
涪陵页岩气田具有不同于北美页岩气区的地面和地下地质条件,山地环境下多井压裂工程设计及现场施工如何组织运行,成为实现该区域页岩气经济有效开发的关键环节。结合涪陵国家级页岩气示范区建设需求,在高效产建模式下形成了基于地质工程一体化理念的拉链压裂整体参数设计技术及运行模式。围绕全面提高页岩气单井产能,针对焦石坝区块山地"井工厂"作业需求及特点,通过压前关键地质因素识别分析、平面—横向—段间多层次工程参数设计、现场施工动态调整等方面开展工艺参数优化,创新了以交叉立体布缝为核心的拉链压裂整体参数设计技术。实现了焦石坝区块页岩气地质工程一体化开发、单井—井组批量化施工,现场推广应用200余口井累计4000余段,在增加水平井组产量、全面提高压裂时效、降低综合成本等方面效果显著,为涪陵页岩气田一期50×108m3产能高速高效建成提供了有力技术支撑。
Fuling shale gas field is different from the shale gas zones in the North America in terms of surface and underground geological conditions. And the key to the economic and efficient development of shale gas in Fuling shale gas field is how to organize and conduct multi-well fracturing engineering design and field construction in the mountainous environment. The overall parameter design technology and operation mode of zipper fracturing based on the concept of geology-engineering integration was established in the pattern of efficient productivity construction according to the construction demand of Fuling national shale gas demonstration area. To increase the shale gas well productivity overall and satisfy the operational demand and characteristics of "well factory" in the mountain areas of Jiaoshiba block, the technological parameters were optimized from the aspects of prefrac key geological factor identification and analysis, areal-lateral-interval multiple level engineering parameter design, dynamic adjustment of field construction, etc, and then the overall parameter design technology of zipper fracturing with three-dimension cross fracture arrangement as the core was innovatively developed. And thus, geology-engineering integration and single well-well group batch construction are realized for the shale gas development in Jiaoshiba block. It was practically applied to over 4000 intervals in more 200 wells cumulatively. It plays a remarkable role in increasing the production rate of horizontal well group, improving the fracturing time efficiency overall and reducing the comprehensive cost. And it provides the powerful technical support for the fast and efficient productivity construction of 50×108 m3 in the first stage of Fuling shale gas field.
Fuling shale gas field is different from the shale gas zones in the North America in terms of surface and underground geological conditions. And the key to the economic and efficient development of shale gas in Fuling shale gas field is how to organize and conduct multi-well fracturing engineering design and field construction in the mountainous environment. The overall parameter design technology and operation mode of zipper fracturing based on the concept of geology-engineering integration was established in the pattern of efficient productivity construction according to the construction demand of Fuling national shale gas demonstration area. To increase the shale gas well productivity overall and satisfy the operational demand and characteristics of "well factory" in the mountain areas of Jiaoshiba block, the technological parameters were optimized from the aspects of prefrac key geological factor identification and analysis, areal-lateral-interval multiple level engineering parameter design, dynamic adjustment of field construction, etc, and then the overall parameter design technology of zipper fracturing with three-dimension cross fracture arrangement as the core was innovatively developed. And thus, geology-engineering integration and single well-well group batch construction are realized for the shale gas development in Jiaoshiba block. It was practically applied to over 4000 intervals in more 200 wells cumulatively. It plays a remarkable role in increasing the production rate of horizontal well group, improving the fracturing time efficiency overall and reducing the comprehensive cost. And it provides the powerful technical support for the fast and efficient productivity construction of 50×108 m3 in the first stage of Fuling shale gas field.
引文
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[6]梁兴,王高成,张介辉,舒红林,刘臣,李兆丰,等.昭通国家级示范区页岩气一体化高效开发模式及实践启示[J].中国石油勘探,2017,22(1):30.Liang Xing,Wang Gaocheng,Zhang Jiehui,Shu Honglin,Liu Chen,Li Zhaofeng,et al.High-efficiency integrated shale gas development model of Zhaotong national demonstration zone and its practical enlightenment[J].China Petroleum Exploration,2017,22(1):30.
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[21]刘旭礼.威202H2平台“工厂化”压裂作业实践[J].天然气勘探与开发,2017,40(3):64.Liu Xuli.Application of“factory-like”fracturing operation in Wei 202H2 Pad[J].Natural Gas Exploration and Development,2017,40(3):64.
[22]任勇,钱斌,张剑.长宁地区龙马溪组页岩气工厂化压裂实践与认识[J].石油钻采工艺,2015,37(4):97.Ren Yong,Qian Bin,Zhang Jian.Practice and understanding of industrial fracturing for shale gas of Longmaxi Formation in Changning region[J].Oil Drilling&Production Technology,2015,37(4):97.
[23]钱斌,张俊成,朱炬辉,方泽本,寇双峰,陈锐.四川盆地长宁地区页岩气水平井组“拉链式”压裂实践[J].天然气工业,2015,35(1):81-84.Qian Bin,Zhang Juncheng,Zhu Juhui,Fang Zeben,Kou Shuangfeng,Chen Rui.Application of zipper fracturing of horizontal cluster wells in the Changning shale gas pilot zone,Sichuan Basin[J].Natural Gas Industry,2015,35(1):81-84.
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