产水是目前许多油田面临的主要问题之一。如果处理不当,高含水将严重影响项目的经济效率,使产量下降,采收率下降,处理成本上升。高含水很可能从几个方面引起经济和作业方面的问题,这就需要提高水分离和处理的能力,同时需要以环境友好的方式来处理大量的采出水。在沙特阿拉伯地区的一些油田采用注水方式保持地层压力,这样在油田的早期阶段就开始产水。SandiAramco管理的一些油田基本上采用水平井钻井,尤其在世界最大的油田之一Ghawar油田更是如此。鉴于钻机修井作业的要求高、成本高,一些油田只能采用无钻机式的修井作业进行堵水。本文重点阐述在Ghawar油田南部首次采用连续油管修井法隔离生产井底部的产水带,实现无钻机修井堵水的方法、设备以及相关的程序。该作业中需要用到过油管膨胀封隔器、和泥浆液接触的悬空水泥塞以及防止水泥塞坍塌的高黏度凝胶。 Water production is one of the major problems facing many fields today. If not handled properly, high water cut will seriously affect the economic efficiency of the project, so that the output decreased, the recovery rate decreased, the processing costs. High water cut is likely to cause economic and operational problems in several areas, which requires improved water sequestration and disposal capacity, while requiring large quantities of produced water to be processed in an environmentally friendly manner. Some oilfields in the Saudi Arabian region use water injection to maintain formation pressure, thus producing water in the early stages of the field. Some fields managed by SandiAramco are basically horizontal well drilling, especially in the Ghawar field, one of the largest in the world. In view of the rigging workover drilling rig requirements, high cost, some oilfields can only use drilling rig-free workover operations to block water. This article focuses on the first time in the southern Ghawar oilfield using coiled tubing workover method to isolate the bottom of the production wells to produce water without drilling rig workover methods and equipment, and related procedures. This operation requires the use of a tubing expander packer, dangling cement plugs that come into contact with the slurry, and high-viscosity gels that prevent the plugs from collapsing.