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塔河油田Φ177.8mm套管开窗侧钻井技术难题与对策探讨
海洋石油
2012年 32卷 第2期
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Title
Difficulties and Measures for Sidetracking Technology withΦ177.8 mm Casing in Tahe Oil Field
Authors
HAO Heya
ZHOU Wei
LEI Xinchao
单位
中国石化集团上海海洋石油局, 上海 200120;
中国石油化工股份有限公司西北油田分公司工程技术研究院, 新疆乌鲁木齐 830011
Organization
SINOPEC Shanghai Offshore Petroleum Bureau, Shanghai 200120, China;
Engineering Research Institute, SINOPEC Northwest Company, Urumqi Xinjiang 830011, China
摘要
近年来,塔河油田为满足部分侧钻井的地质避水要求,采取从石炭系巴楚组或奥陶系上部桑塔木组泥岩段进行开窗侧钻,但泥岩在井内液体浸泡下存在易坍塌、掉块等不稳定问题,给钻井、完井带来了巨大的安全隐患。此文介绍了塔河油田Φ177.8 mm套管开窗侧钻井技术现状与难题,探讨了下Φ127 mm套管、膨胀波纹管、实体膨胀管封隔泥岩三种技术方案的可行性。
Abstract
In recent years, the sidetracking technology has been used in Bachu formation of Carboniferous or Sangtamu formation of the upper Ordovician in Tahe oil field in order to meet the requirement of avoiding water in parts of side tracked holes. However, some problems might occur, such as the mudstones are not stable and might collapse and fall off when immersed in liquid within the hole, bring about huge potential safety hazards for drilling and well completion. In this paper, the difficulties when using sidetracking technology with Φ177.8 mm casing in Tahe oil field has been summarized, and the feasibility of using three technologies to seal mudstone, including running Φ127 mm casing, expandable convoluted tubing and solid expandable tabular has been discussed.
关键词：
开窗侧钻;
泥岩稳定;
膨胀管;
扩孔;
小井眼;
塔河油田;
Keywords:
casing sidetracking drilling;
mudstone stability;
expandable tubular;
borehole enlargement;
slim hole;
Tahe Oil Field;
DOI
https://doi.org/10.3969/j.issn.1008-2336.2012.02.090
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