顺北一区超深井窄间隙小尾管固井技术研究  

Slim Liner Cementing Technology for Ultra-Deep Wells with a Narrow Annulus in No.1 District of Shunbei Block

作　　者：邹书强[1] 张红卫[1] 伊尔齐木 李翔[1] ZOU Shuqiang;ZHANG Hongwei;Eerqm;LI Xiang(Sinopec Northwest Oilfield Company,Urumuqi,Xinjiang,830011,China)

机构地区：[1]中国石化西北油田分公司

出　　处：《石油钻探技术》2019年第6期60-66,共7页Petroleum Drilling Techniques

基　　金：国家重点基础研究发展计划（“973”计划）项目“深井复杂地层安全高效钻井基础研究”（编号：2010CB226700）;国家自然科学基金项目“控压钻井测控理论及关键问题研究”（编号：51334003）联合资助

摘　　要：顺北一区超深井窄间隙小尾管固井面临水泥环薄弱、注替泵压高、顶替效率低、井下温度高和高压盐水层发育等一系列技术难题,固井质量难以保证。为解决该问题,在总结前期固井施工经验的基础上,完善了井眼准备技术,优化了抗高温防气窜弹韧性水泥浆体系,开展了水泥石密封完整性研究,进行了固井流变学设计及压稳防气窜工艺优化,形成了顺北一区超深井窄间隙小尾管固井技术。该固井技术在现场应用3井次,固井质量良好,后期施工未发生水侵,保证了窄间隙段的长效密封性。顺北一区超深井窄间隙小尾管固井技术,不但解决了该区块的固井难题,还保障了该区块的安全、高效开发。Slim liner cementing in ultra-deep wells with narrow annulus in the No.1 District of the Shunbei Block faces a series of technical challenges such as weak cement sheath,high displacement pumping pressure,low displacement efficiency,high bottomhole temperature and the development of high-pressure brine layer,which compromises the cementing quality.In order to solve those problems,on the basis of summarizing the previous operation experiences,small liner cementing technology for ultra-deep wells with narrow annulus in the No.1 District of the Shunbei Block was formed by improving wellbore preparation technologies,optimizing the high temperature/gas channeling-proof elastic toughness cement slurry system,conducting cement stone sealing integrity research and carrying out cementing rheology design and stable-killing gas channeling-proof optimization.It has been applied in 3 wells in this area with good cementing quality.The subsequent operations were free from water intrusion,ensuring the long-term sealing of section with a narrow annulus.This cementing technology can not only effectively solve the cementing problems of this block,but also effectively ensure the safe and efficient development of the block.

关 键 词：超深井 窄间隙 尾管固井 防气窜 弹韧性水泥浆 顺北一区 

分 类 号：TE256.4[石油与天然气工程—油气井工程]