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。
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 offwhen immersed in liquid within the hole, bring about huge potential safety hazards for drilling and well completion. In this paper, the difficulties when using sidetrack- ing technology with qb177.8 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.
出处
《海洋石油》
CAS
2012年第2期90-94,共5页
Offshore Oil
关键词
开窗侧钻
泥岩稳定
膨胀管
扩孔
小井眼
塔河油田
casing sidetracking drilling
mudstone stability
expandable tubular
borehole enlargement
slim hole
Tahe Oil Field
