大牛地气田气井油管钻铣除垢技术应用.docx

大牛地气田气井油管钻铣除垢技术应用刘争芬，常辉，罗满岐（中石化华北分公司第一采气厂，河南郑州 450006）摘 要：大牛地气田气井受产出水质特征影响，井内油管普遍有结垢现象，影响了气井生产，为了解决井内管柱结垢问题，提高气井生产能力，有必要寻找一种有效的气井油管除垢方法。根据大牛地气田气井结垢特征，通过对传统机械除垢技术的缺点分析，优选确定采用机械钻铣除垢技术，根据大牛地气田气井管柱结构特点，自主设计了该除垢方法所需的井内油管除垢工具和钻铣液配方，制定了除垢施工作业方案，并预先在地面进行了油管除垢试验。最终选取了两口气井进行正式的现场钻铣除垢作业，有效除去了井内油管管柱的结垢物，气井取得了良好的增产效果，气井产量比除垢前增加 30 %～50 %。通过与相关的其它除垢技术进行比较，如水力喷射除垢技术，钻铣除垢技术在气井油管除垢方面效果更好。关键词：大牛地气田；油管结垢；钻铣除垢；钻铣液；水力喷射除垢doi:10.3969/j.issn.1673-5285.2015.01.031中图分类号：TE935文献标识码：A文章编号：1673-5285（2015）01-0122-04Drilling and milling decaling technology of gas wellstube in Daniudi gas filedLIU Zhengfen，CHANG Hui，LUO Manqi（Gas Production Plant 1 of North China Branch Company of Sinopec，Zhengzhou Henan 450006，China）Abstract:Affected by the output water characteristics, gas wells tubing in Daniudi gas fieldgenerally have scaling phenomenon, this affects gas production. In order to solve the well string scaling problems and improve gas production capacity, it is necessary to find an effec－ tive tube descaling method. According to scaling characteristics of gas wells and shortcom－ ings of the traditional mechanical descaling, we select the drilling and milling machine descaling technology. Based on structural characteristics of gas wells tube in Daniudi gas field, we design the wells tubing drilling and milling tools and cleaning liquid formulations,also we developed a descaling construction program and had a tube descaling test on the ground beforehand. Finally we conducted a field descaling operation in two wells and achieved good yield results. The gas production increased by 30 %～50 % higher than before. Compared with other related technologies, such as hydro -jet descaling technology, the drilling and milling descaling technology has a better effect in terms of tube descaling in gas* 收稿日期：2014－10-24基金项目：国家科技重大专项，项目编号：2011ZX05045。作者简介：刘争芬，女（1981-），山东德州人，工程师，硕士，主要从事天然气管道设备防腐防垢工作，邮箱：mailto:lzf36100@163.comlzf36100@163.com。刘争芬等大牛地气田气井油管钻铣除垢技术应用第 1 期123wells.