摘要
四川元坝地区固井面临井深、高温、盐膏层蠕变、固井安全密度窗口窄、防漏防窜矛盾突出等诸多技术难题,给固井作业带来了很多挑战。针对元坝地区已经完成的11口探井存在的固井工艺技术不够完善、固井质量不稳定的现状,分析了该地区固井存在的主要技术难题,并对不同地层固井的水泥浆体系进行了针对性选型,强化了通井技术措施,综合应用了提高顶替效率的技术措施等。在元坝12井等井固井中应用,已经初步取得了成效。
Technical challenges to cementing operations in Yuanba area, Sichuan, consist of large well depth, high temperature, creeps of gypsum formations, narrow density range of safety cement slurry, remarkable confliction between prevention of circulation loss and influx, etc. Cementing jobs conducted on 11 wells in Yuanba area show inconsistent cementing quality and imperfect cementing techniques. The main technique challenges are analyzed, and the proper cement slurry suitable for various formations are optimized, and wellbore reaming job is emphasized. The mud displacement efficiency is improved remarkably. Cementing job using improved technical measurements on Well Yuanba-12 has achieved successfully.
出处
《石油钻探技术》
CAS
北大核心
2010年第1期20-25,共6页
Petroleum Drilling Techniques
基金
国家高技术研究发展计划("863"计划)项目"超深井钻井技术研究"(编号:2006AA06A109)资助
关键词
超深井
探井
水泥浆
固井
元坝地区
ultradeep well
exploratory well
cement slurry
well cementing
Yuanba area
