油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (4): 57-60.

• 石油工程 • 上一篇    下一篇

东胜气田井下真空隔热油管工艺应用效果分析

唐万举   

  1. 中国石化华北油气分公司工程技术管理部,河南 郑州 450006
  • 收稿日期:2018-09-18 出版日期:2019-08-26 发布日期:2019-08-28
  • 作者简介:唐万举(1973 —),男,本科,高级工程师,从事采气工艺工作。通讯地址:河南省郑州市中国石化华北油气分公司工程技术管理部,邮政编码:450006。E-mail: hbjyctwj@163.com

Analysis on application effect of downhole vacuum insulated tubing in Dongsheng gas field

TANG Wanju   

  1. (Engineering Technology Management Department, East China Company, SINOPEC, Zhengzhou, Henan 450006, China)
  • Received:2018-09-18 Online:2019-08-26 Published:2019-08-28

摘要:

东胜气田采用“井下节流、低压集输”的模式生产。由于生产需要,一些气井需采用井口节流控制生产,但井口节流容易在地面生成水合物,需要在节流前提高井筒和地面流体温度。为此东胜气田在目标区块开展了井下真空隔热油管工艺试验。根据试验结果,运用Pipesim软件进行数据拟合,验证了隔热油管在气田的使用效果,并对隔热油管工艺在气田的应用情况进行了预测分析。结果显示,井下真空隔热油管能明显提高井口流体温度,保证井口管线不生成水合物,实现一定程度的节能降耗。现场数据拟合结果也证明了井下真空隔热油管传热系数明显低于普通油管。通过工艺进站情况分析,综合考虑成本及低压集输特点,认为该工艺在低压气田的应用存在一定的限制性,但是在必须采用井口节流生产的情况下可以作为气田的一项备选工艺。

关键词: 东胜气田, 井下真空隔热油管, 井筒保温, 井口节流, 进站生产预测

Abstract:

The production mode adopted by Dongsheng gas field is “downhole throttling and low pressure gathering and transportation”. In order to meet the production needs, some gas wells need wellhead throttling to control production. However, wellhead throttling is easy to generate hydrate on the ground. So it is necessary to increase the wellbore and surface fluid temperature before throttling. Therefore, downhole vacuum insulated tubing test was carried out in the target block of Dongsheng gas field. According to the test results, the data fitting was carried out by using the software—Pipesim—to verify the application effect of insulated tubing in gas field, and its application situation is predicted and analyzed. The test results showed that, the vacuum insulated tubing could obviously increase the fluid temperature of the wellhead, and prevent the hydrate formation in wellhead pipeline, so that to realize energy saving and consumption reduction to some extent. The fitting results of the field data also showed that the heat transfer coefficient of downhole vacuum insulated tubing was significantly lower than that of the common tubing. According to the application analysis, and considering the cost and the characteristics of low pressure gathering and transportation, it is concluded that there are certain limitations in the application of this technology in the low-pressure gas field. But it could be used as an alternative process of gas field if the wellhead throttling production must be adopted.

Key words: Dongsheng gas field, vacuum insulated tubing, wellbore heat preservation, wellhead throttling, prediction of production in station

中图分类号: 

  • TE934