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Connotation,key issues,and future development of the new-generation volume stimulation technology 认领 引用
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作者 XU Yun WENG Dingwei +8 位作者 MA Zeyuan LI Deqi CAI Bo CHEN Ming YI Xinbin FU Haifeng YANG Zhanwei LI Shuai JIANG Hao 《Petroleum Exploration and Development》 SCIE 2026年第2期512-533,共22页
This paper systematically reviews the development history and generational characteristics of multi-stage fracturing technology in horizontal wells and defines the connotation and essence of the new-generation volume ... This paper systematically reviews the development history and generational characteristics of multi-stage fracturing technology in horizontal wells and defines the connotation and essence of the new-generation volume stimulation technology,as represented by eXtreme Limited Entry(XLE).The research indicates that classical fracturing theory remains the cornerstone for optimizing stimulation designs.Optimization based on fracture units is fundamental for achieving “perfect fracturing”,while “proppant loading intensity” serves merely as a statistical parameter and therefore cannot be used to evaluate fracturing effectiveness.Consequently,expanding the stimulated volume is identified as the key to achieving optimal stimulation results.Regarding limited entry perforation strategies,the study clarifies that all clusters initiation can be achieved when the total perforation friction exceeds the horizontal in-situ stress difference among clusters.Furthermore,XLE requires a total perforation friction greater than 10 MPa,superimposed on the treating pressure at wellhead after all clusters initiation,to ensure even fluid distribution across all fractures.Based on the characteristics of “fracture swarms” observed in cores from hydraulic fracturing test sites(HFTS),it is revealed that creating a single principal fracture is critical for effective fracture propagation.Drawing on the rheological characteristics of proppant settling in slickwater and learnings from North American HFTSs,three novel viewpoints on modern fracturing are proposed:Slickwater fracturing relies on velocity for proppant transport,and subsequently injected proppant travels the furthest,suggesting that “CounterProp” is the future direction of fracturing technology;High-viscosity slickwater struggles to achieve effective proppant transport;The proppant settling mode determines that the dynamic fracture width during the treatment is effectively equal to the propped fracture width.Finally,the technical connotation and implementation pathway for “whole-domain propped” treatment are presented,and a future development vision for Autonomous Intelligent Fracturing(AIF) is proposed. 展开更多
关键词 volume stimulation extreme limited entry fracture-controlled reservoir close cutting full-domain propping perfect fracturing gas suspension CounterProp propped fracture width
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新一代体积改造技术新内涵、关键问题及未来发展方向 认领 引用
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作者 胥云 翁定为 +8 位作者 马泽元 李德旗 才博 陈铭 易新斌 付海峰 杨战伟 李帅 蒋豪 《石油勘探与开发》 EI CAS CSCD 北大核心 2026年第2期440-454,共15页
系统梳理水平井分段压裂技术发展历程及划代特征,确立以极限限流为主导的新一代体积改造技术的内涵与实质。研究指出:经典压裂理论是指导压裂优化设计的根本;以裂缝单元为基础的压裂优化设计是实现“完美压裂”的基础;“加砂强度”是统... 系统梳理水平井分段压裂技术发展历程及划代特征,确立以极限限流为主导的新一代体积改造技术的内涵与实质。研究指出:经典压裂理论是指导压裂优化设计的根本;以裂缝单元为基础的压裂优化设计是实现“完美压裂”的基础;“加砂强度”是统计意义参数,不能用于评估压裂效果;扩大波及体积是实现最佳改造效果的关键。限流射孔压裂时的截流阻力大于簇间平面地应力差能实现各簇全开启;极限限流则要求在簇全开启后附加在井口施工压力上的截流阻力大于10 MPa,可实现各簇裂缝均匀进液。水力压裂试验场取心“裂缝群”特征表明,建立单缝优势通道是确保裂缝有效延伸的关键。基于滑溜水输砂沉降流变特征和北美水力压裂试验场成果,提出了现代压裂的3个新观点:滑溜水压裂依靠速度携砂,后续注入的支撑剂运移距离最远,“逆序输砂”是未来压裂技术方向;高黏滑溜水难以实现有效携砂;携砂沉降模式决定了压裂施工过程中“动态缝宽等于支撑缝宽”。给出“全域支撑”的技术内涵与实现路径,提出“自主智能压裂(AIF)愿景”的未来发展方向。 展开更多
关键词 体积改造 极限限流 裂缝控藏 密切割 全域支撑 完美压裂 气悬浮 逆序输砂 支撑缝宽
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