摘要
基于水平井体积改造理论研究和10年现场应用情况,进一步诠释体积改造的核心内涵,分析体积改造的实现方法、设计模型与关键问题,提出了未来发展方向。研究表明:分簇限流技术能实现多簇均衡扩展,应用"冻胶破岩+滑溜水携砂"复合压裂模式及小粒径支撑剂可降低近井裂缝复杂度,提高远井改造体积;剪切自支撑裂缝与滑溜水输砂能够满足非常规储集层对导流的需求,子井与母井的最优井距应根据压裂模式、规模和压降范围确定,重构渗流场、应力场和改造对象是提高水平井重复压裂效果的关键。缩小井距与簇间距的密切割技术是未来建立"缝控"可采储量开发模式的基础,结合立体式体积改造与地质工程一体化压裂优化设计决策系统,是体积改造技术发展与应用的重要方向。
Based on the theoretical study and field application of volume stimulation in horizontal wells over the past 10 years,the core connotation of volume stimulation was further interpreted.The implementation methods,design models and key issues were analyzed,and the future development direction was put forward.The research shows that the multi-cluster limited entry technique can achieve homogenous growth of multiple fractures.The hybrid stimulation of“breaking rock by gel stimulation+carrying proppant by slick water”plus small-particle proppant can reduce the fracture complexity near the well bore and increase stimulated reservoir volume(SRV)in the far-field.The requirement of fracture conductivity in unconventional formations can be met by shear-sustained fractures and proppant-transporting slick water.The optimum well spacing between a child well and a parent well should be determined by the stimulation modes,injection volume and pressure drawdown.Reconstructing seepage field,stress field and stimulation targets is crucial for improving the stimulation results in a horizontal well.Reducing cluster spacing and well spacing is the basis for establishing development modes of fracture-controlled reserves.Fracturing-design decision system based on“spatial-mode stimulation”and geology-engineering integration is an important research direction for volume stimulation techniques.
作者
胥云
雷群
陈铭
吴奇
杨能宇
翁定为
李德旗
蒋豪
XU Yun;LEI Qun;CHEN Ming;WU Qi;YANG Nengyu;WENG Dingwei;LI Deqi;JIANG Hao(Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,China;The Key Laboratory of Reservoir Stimulation,PetroChina,Langfang 065007,China;China University of Petroleum,Beijing 102249,China;PetroChina Exploration and Production Company,Beijing 100007,China;PetroChina Zhejiang Oilfield Company,Hangzhou 310023,China)
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2018年第5期874-887,共14页
Petroleum Exploration and Development
基金
国家科技重大专项"储集层改造关键技术及装备"(2016ZX05023)
关键词
体积改造
分簇限流
剪切裂缝
小粒径
密切割
立体式改造
水平井
重复压裂
volume stimulation
multi-cluster limited entry
shear fracture
small particle size
tight spacing
spatial-mode stimulation
horizontal wells
restimulation
作者简介
第一作者简介:胥云(1961-),男,重庆市人,博士,中国石油勘探开发研究院教授级高级工程师,主要从事油气藏压裂酸化基础理论、技术方法与现场应用等研究工作。地址:河北省廊坊市万庄石油分院,邮政编码:065007。E-mail:xuyun69@petrochina.com.cn
