页岩油水平井压裂后变形套管液压整形技术  

Hydraulic Shaping Technology of Deformed Casing after Fracturing in Horizontal Shale Oil Wells

作　　者：张宏峰 ZHANG Hongfeng(Downhole Operation Company,PetroChina Dagang Oilfield Company,Tianjin,300283,China)

机构地区：[1]中国石油大港油田分公司井下作业公司,天津300283

出　　处：《石油钻探技术》2023年第5期173-178,共6页Petroleum Drilling Techniques

摘　　要：页岩油藏需要大规模体积压裂后才能获得工业油流,但大液量、大排量的体积压裂易导致套管变形、缩径,套变段以下井段无法下入压裂工具和投产工具,而常规液压整形技术存在修复能力差、滚珠易落井和有效期短等不足,难以满足工艺要求。为解决该问题,设计加工了扩张式胀管器等系列液压胀套工具,经过室内试验,完善了胀套工艺,形成了页岩油水平井压裂后变形套管液压整形技术。沧东凹陷页岩油水平井现场试验表明,该技术有效期长,可以解决页岩油开发中的套管变形问题,满足投产时连续管钻除多级压裂桥塞(扫塞)恢复底层井段能量的需要。Shale oil reservoirs need large-scale volume fracturing to obtain industrial oil flow.However,volume fracturing with a large fluid amount and large displacement is easy to cause casing deformation and borehole shrinkage,and it is hard to run fracturing and production tools into the well section below casing deformation.Conventional hydraulic shaping technologies have shortcomings such as poor repair ability,easy ball drop,and short validity period and thus fail to meet the technological requirements.In view of these problems,a series of hydraulic casing expansion tools were designed,such as expandable casing swage.Through laboratory tests,the casing expansion technology was perfected,and the hydraulic shaping technology of the deformed casing after fracturing in horizontal shale oil wells was formed.Field tests in Cangdong Sag show that the technology has a long validity period and can successfully solve the casing deformation problem in shale oil development,and it can restore the energy of the bottom well section by coiled tubing drilling out the multi-stage fracturing bridge plug(sweeping plug)when put into production.

关 键 词：页岩油 套管变形 套管整形 液压胀套 体积压裂 水平井 沧东凹陷 

分 类 号：TE358.9[石油与天然气工程—油气田开发工程]