第39参第4期 2017年7月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2017)04046004
DOI:10.13639/j.odpt.2017.04.012
Vol. 39 No. 4 July 2017
双层套管锻铣技术在环空带压弃并中的应用
李福明】孙文化叶周明范丰年】倪国胜3齐安华
1.中海油能源发展工程技术分公司；2.中海石油（中国)有限公司天津分公司；3.浙海钻探工程有限公司并下技术服务分公司
引用格式：李福明，孙文化，叶周明，范车年，倪国胜，齐安华，双层套管锻铣技术在环空带压弃井中的应用[J].石油钻采工艺,2017,39(4); 460-463.
摘要：中东波斯湾海域某探井出现环空带压，弃井期间多次尝试在气源层射孔挤注处理环空带压问题，未获成功。在气源层上部锻铣0244.475mm与0339.725mm双层套管，并在锻铣井段内注防气审水泥塞，通过负压测试等证实了可以利用水泥塞实现对气源层的有效封隔。现场应用表明，环空带压并弃并作业中运用多层套管锻铣注水泥塞技术能够御底解决射孔挤注难以处理的环空带压问题。
关键词：锻铣套管；注水泥塞；环空带压；弃井
中图分类号：TE243
文献标识码：A
Application of dual casing section milling technology to the abandoned wells with sustained
casingpressure
LI Fuming",SUN Wenhua',YEZhouming".FAN Fengnian',NI Guosheng,QIAnhua
1. EnerTech-Drilling & Production Co., CNOOC Energy Technology & Services Limited, Tianjin 300452, China;
2. Tianjin Branch of CNOOC China Ld., Tianjin 300452, China;
3. Downhole Technology Senvice Lrd., CNPC Bohai Drilling Engineering Compary Limited, Tianjin 300452, China
Citation: LI Fuming, SUN Wenhua, YE Zhouming, FAN Fengnian, NI Guosheng, QI Anhua. Application of dual casing section milling technology to the abandoned wells with sustained casing pressure [J] . Oil Drilling & Production Technology, 2017, 39(4): 460-463.
Abstract: SAP (sustained annular pressure) was observed in a exploration well in Persian Gulf. And during its abandonment, per-foration and cementing in the gas source layers was tried many times to kill the SAP, but no success is ever achieved. In this paper, the dual casing (0244.475 mm and 0339.725 mm) in the upper part of gas source layers was milled, and gas block cement plug was set in the milled section. It is verified by negative pressure test that cement plug can isolate the gas source layers effectively. Field application shows that multi-layer casing milling and cement plug technology can solve completely the SAP problem which cannot be dealt with by the conventional perforation and cementing technology.
Key words: Casing section milling; cement plug; annulus pressure; abandoned well
环空带压简称SCP或SAP，多由油套管泄露、固井质量差或井下温度效应导致水泥和套管界面胶结失效而形成1，不仅破坏井筒完整性，弃井时也难以处理。中东波斯湾海域某探井出现环空带压，弃井作业时先后采用了在气源层射孔挤注和锻铣套管注水泥塞等措施来处理，效果较好。
1井身结构及环空带压概况
Casing program and SCP summary
该井为高温高压气井，作业水深30m，共6开井眼，依次钻遇新生界第三系，中生界白垩系、保罗系、三叠系和古生界二叠系和泥盆系地层。该区域新生
第一作者：李福明（1984-),2007年毕业于长江大学机设计制造及其白动化专业，主要从事海洋石沟钻完井监督工作。通讯地址：
(300452)天津市塘洁区激海石油路688号海洋石油大厦B座B809。电语；022-25807552。E-mail；lifm2@enooc.com.cn
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