论文详情
双层套管锻铣技术在环空带压弃井中的应用
石油钻采工艺
2017年 39卷 第4期
阅读：87
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Title
Application of dual casing section milling technology to the abandoned wells with sustained casing pressure
作者
李福明
孙文化
叶周明
范丰年
倪国胜
齐安华
Authors
LI Fuming
SUN Wenhua
YE Zhouming
FAN Fengnian
NI Guosheng
QI Anhua
单位
中海油能源发展工程技术分公司
中海石油(中国)有限公司天津分公司
渤海钻探工程有限公司井下技术服务分公司
Organization
EnerTech-Drilling & Production Co., CNOOC Energy Technology & Services Limited, Tianjin 300452, China
Tianjin Branch of CNOOC China Ltd., Tianjin 300452, China
Downhole Technology Service Ltd., CNPC Bohai Drilling Engineering Company Limited, Tianjin 300452, China
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Ø244.475 mm与Ø339.725 mm双层套管，并在锻铣井段内注防气窜水泥塞，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，环空带压井弃井作业中运用多层套管锻铣注水泥塞技术能够彻底解决射孔挤注难以处理的环空带压问题。
Abstract
SAP (sustained annular pressure) was observed in a exploration well in Persian Gulf. And during its abandonment, perforation 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 (Ø244.475 mm and Ø339.725 mm) in the upper part of gas source layers was milled, and gas block cement plug was set in the milled section. It is verifed 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.
关键词：
锻铣套管;
注水泥塞;
环空带压;
弃井;
Keywords:
Casing section milling;
cement plug;
annulus pressure;
abandoned well;
DOI
10.13639/j.odpt.2017.04.012
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