定向井小套管二次完井及配套技术  

Small casing secondary well completion of directional wells and matching techniques

作　　者：刘加旭[1] 刘道杰[1] LIU Jiaxu;LIU Daojie(Onshore Operation Zone,PetroChina Jidong Oilfield Company,Tangshan 063200,Hebei,China)

机构地区：[1]中国石油冀东油田分公司陆上油田作业区,河北省唐山市063200

出　　处：《石油钻采工艺》2022年第6期701-705,共5页Oil Drilling & Production Technology

摘　　要：老油田经过多年开采,部分油藏整体进入特高含水开发阶段,剩余油高度分散,稳产难度大,同时,油井纵向上油层均经历多次补孔、封层重射等措施作业,导致井筒状况复杂,不能满足单井措施要求,严重影响了油藏井网重构效果。为完善井筒条件,满足CO_(2)协同吞吐、调堵+吞吐等逐层上返开发的措施需要,开展了定向井小套管二次完井矿场试验。针对施工过程中管串下入难度大、固井质量难以保证等技术难点,形成了高效打通道、液压滚珠整形、小套管固井等系列定向井小套管二次完井技术,达到了复杂井长井段封堵、耐CO_(2)腐蚀、井筒承压高等效果,实现了井筒重塑,为油田井网完善、提高可采储量提供了技术支持。After years of production,part of oil reservoirs in the mature oilfield has entered the ultra-high water cut development stage.The remaining oil occurrence is highly dispersed,and it is hard to maintain stable production.Meanwhile,multiple reperforating and plugging-perforating operations have been performed in oil wells along the vertical profile of oil layers,which results in complex wellbore conditions and failure to meet the requirements of well treatment.This severely impacts the reconstruction performance of well patterns.To improve wellbore conditions and meet the treatment requirements of gradually producing layers from bottom to top,such as CO_(2) synergistic cyclic injection and the combination of profile control,plugging,and cyclic injection,the field testing of small casing secondary well completion in directional wells was performed.To overcome the difficulties in casing running and ensuring cementing quality,the directional well small casing secondary well completion technical series was formed,which consists of high-efficiency channel milling,hydraulic rolling casing swage,and small casing cementing techniques.The presented technique series delivers the wellbore reconstruction,characterized by the long-interval sealing of complex wells,resistance to CO_(2) corrosion,and high pressure-bearing capacity,and provides technical support for well pattern improvement and increasing recoverable reserves in mature oilfields.

关 键 词：定向井 CO_(2)吞吐 小套管 二次完井 固井 

分 类 号：TE257[石油与天然气工程—油气井工程]