提高?139.7mm套管开窗侧钻固井质量的途径

WAYS OF IMPROVING THE ?139.7 MM CASING CUTTING WINDOW SIDETRACK DRILLING CEMENTING QUALITY

曹泽甫

Cao Zefu

中原油田公司工程监督中心, 河南濮阳 457001

Zhouyuan Oilfield Co. Petroleum Engineering Supervision Center, Puyang 457001, Henan

断块油气田区块碎、连片性差、死油区多,套管损坏严重,利用开窗侧钻技术可解决油田开发中套管损坏的难题。研究开窗侧钻井固井质量,对提高油气开发效果、延长油井的使用寿命、降低成本,具有重要意义。通过改进完井液及水泥浆性能并优选配方、采取套管扶正技术、尾管柱优化设计、环空加回压技术、裸眼段扩孔技术、套管旋转固井技术等,解决?139.7mm套管开窗侧钻固井质量问题。中原油田自2000年全面实施套管开窗侧钻技术以来,完井固井工艺得到了完善,取得了较好的效果,累计施工267口井,成功率98.5%,井身质量和固井质量优良率均超过80%。累计增油约16×104t,经济效益显著。

The block of Fault block oil and gas field is small and the connection is poor, and the dead area is great, and the casing damage is serious, utilization of the cutting window sidetrack drilling technique can resolve the difficulty of oil field production. The research cutting window sidetrack drilling cementing quality has important significance for improving oil development result, extending the production life of oil well and reducing the cost. Resolve ?139.7mm casing cutting window sidetrack drilling cementing quality problem by improving the performance of completion fluid and slurry, optimizing slurry formulation, adopting casing centralization technique, optimizing tail pipe design, adding annular return pressure technique, reaming technique of open hole section and rotary casing well cementing technique. Since 2000 Zhongyuan Oil Field puts the casing cutting sidetrack drilling technique completely into practice, well completion and well cementing technology gain new development and improvement and obtain good result. The success ratio of the total amount 267 wells is 98.5%, the ratio of both good wellbore quality and good cementing quality is over 80%. Accumulative total production increases 160 000 tons, and the economic beneficial result is remarkable.

10.3969/j.issn.1000-7393.2005.02.004