石油科技论坛

石油科技论坛 ›› 2017, Vol. 36 ›› Issue (5): 39-43.DOI: 10.3969/j.issn.1002-302x.2017.05.08

• 专题策划 • 上一篇    下一篇

连续管冲盐解堵工艺在英西的应用

陈柯桦1　盛国青1　路彦森1　朱　峰2　徐惠军1　陈微熙 1   

  1. 1. 中国石油青海油田公司井下作业公司；2. 中国石油集团钻井工程技术研究院江汉机械研究所
  • 出版日期:2017-10-31 发布日期:2017-11-15
  • 基金资助:
    中国石油天然气集团公司重大推广专项“连续管作业技术推广专项”（编号：2011B-1711）；中国石油天然气集 团公司重大推广专项“连续管作业技术专项推广（二期）”（编号：2017B-4107）。

Application of Coiled Tubing Salt Flushing and Plug Removing Process in Yingxi Area

Chen Kehua1, Sheng Guoqing1, Lu Yansen1, Zhu Feng2, Xu Huijun1, Chen Weixi1   

  1. 1. Downhole Service Company, PetroChina Qinghai Oilfield Company, Mangya 816499, China; 2. Jianghan Machinery Research Institute of CNPC Drilling Research Institute, Jingzhou 434000, China
  • Online:2017-10-31 Published:2017-11-15
  • Supported by:
     

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摘要： 英西地区是近几年青海油田增储上产的重点区域，但由于地层含盐且出盐量大，盐结晶速度快，很多油 井投产后因生产通道堵塞致使产量急剧下降，给勘探开发工作带来很大阻力。针对这一难题，以“下得去、出得来、 伤害小”为原则，制定了以旋流喷射工具冲盐+ 旋转喷射工具扩眼+ 热水溶盐为主，螺杆钻具钻磨、扶正喷射等为辅 的多种连续管冲盐解堵方案，同时设计加工了旋流喷射工具、旋转喷射工具、尖状工具等多种冲盐工具，并在施工中 不断优化工艺参数，形成连续管冲盐解堵工艺系列技术，成功应用近50 井次，为高压高产油井的正常生产提供了有力 保障。

 

关键词: 连续管, 盐结晶, 冲盐解堵, 喷射洗井, 英西地区

Abstract: Yingxi area was a key block for Qinghai Oilfield to increase reserves and production in recent years. However, the formation of this area has a high content of salt. In addition, salt is rapidly crystallized. Production from a lot of oil wells dropped quickly owing to plugging of production channels, causing great difficulties for exploration and development. To solve this bottleneck, the plug removing scheme was designed on the basis of various coiled tubing processes and under the principles of “tripping-in, tripping-out and small damage.” The scheme was mainly focused on rotary spraying jet tools for salt flushing + rotary spraying jet for reaming +hot water for dissolution of salt, with the help of using screw drill for drilling and abrasion as well as stabilizing the spraying jet. Meanwhile, a variety of salt flushing tools were designed and processed, such as rotary flow jet tool, rotary spraying jet tool and sharp point tool, whose process parameters were continually optimized in the service. A series of coiled tubing salt flushing and plug removing process technologies was developed and successfully used at nearly 50 times in the well service, providing effective support for normal production of high-pressure and high-yield oil wells.

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