平顶山盐穴储气库固井技术  

Cementing technology suitable for Pingdingshan salt cavern gas storage

作　　者：张幸 覃毅 李海伟 兰天 ZHANG Xing;QIN Yi;LI Haiwei;LAN Tian(CNPC Research Institute of Petroleum Exploration & Development, Beijing 100083, China;Gas Storage Project Department, CNPC West-to-East Gas Pipeline Company, zhenjiang 212100, Jiangsu, China;No.1 cementing branch, Bohai Drilling and Exploration Engineering Co. Ltd., Renqiu 062552, Hebei, China)

机构地区：[1]中国石油勘探开发研究院 [2]中国石油西气东输管道公司储气库项目部 [3]渤海钻探工程有限公司第一固井分公司

出　　处：《石油钻采工艺》2017年第1期61-65,共5页Oil Drilling & Production Technology

摘　　要：平顶山盐穴储气库含盐地层厚度大,目的层埋藏深,泥岩夹层多,固井难度大、要求高。在分析前期固井施工过程中存在的易漏失、胶结质量差、未返出井口等难题的基础上,通过开展有针对性的盐水水泥浆配方优选、井眼准备、前置液优化、钻井和下套管施工等综合性技术措施的研究,保障了固井顺利施工和固井质量。PT1井是平顶山盐穴储气库的一口探井,该井生产套管一次封固井段长,井眼尺寸大,井筒条件复杂,通过采用综合性能好的抗盐水泥浆体系,避免了固井期间漏失问题的发生,解决了平顶山盐穴储气库固井难题,为该地区后续的固井施工提供了宝贵经验。Pingdingshan salt cavern gas storage is characterized by thick salt formations,deep targets and multiple mudstone interbeds,so its cementing job is difficult and shall meet more requirements.The difficulties that occurred during the previous cementingwere analyzed,such as circulation loss,poor cementation quality and no slurry returning to the wellhead.Then,a series of comprehensivemeasures were specifically studied to guarantee the smooth cementing and cementing quality,including brine cement slurry formulaoptimization,borehole preparation,prepad fluid optimization,well drilling and casing running.Well PT1is an exploration well in Pingdingshansalt cavern gas storage.In this well,the single-stage cementing section of production casing is long,borehole size is large andwellbore conditions are complex.Its circulation loss during cementing is avoided by adopting salt-resisting cement slurry system whosecomprehensive performance is good and adjusting and circulating the performance of drilling fluids sufficiently.And consequently,thecementing difficulties of Pingdingshan salt cavern gas storage are solved.The research results provide the valuable experience for thesubsequent cementing operation in this area.

关 键 词：固井 盐穴储气库 盐水水泥浆 氦气检测 顶替效率 现场试验 

分 类 号：TE256[石油与天然气工程—油气井工程]