新疆石油地质

新疆石油地质 ›› 2010, Vol. 31 ›› Issue (6): 657-658.

• 应用技术 • 上一篇    下一篇

诱导盐沉析控水增气技术

吴凯1, 蒲万芬1, 张超平2, 金发扬1   

  1. 1.西南石油大学 油气藏地质及开发工程国家重点实验室,成都 610500;
    2.中国石油 西南油气田分公司 川东北气矿,四川 达州 635000
  • 收稿日期:2010-03-23 发布日期:2021-01-18
  • 作者简介:吴凯(1985-),男,重庆人,在读硕士研究生,油气田开发,(Tel)13699073686(E-mail)gaowubin0909@163.com.

Water Control Method for Stimulation by Inducing Salt Precipitation in Gas Reservoir

WU Kai1, PU Wan-feng1, ZHANG Chao-ping2, JIN Fa-yang1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Chuandongbei Gas Pool, Southwest Oil-Gas Field Company, PetroChina, Dazhou, Sichuan 635000, China
  • Received:2010-03-23 Published:2021-01-18

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摘要： 针对气藏出水问题,提出了一种盐析控水方法,即通过盐沉析堵塞高渗透区域,从而达到提高气藏采收率的目的。在常温下试验了乙醇加量、NaCl 质量浓度及诱导剂、添加剂对盐沉析性质的影响。通过物理模拟实验可知,当产水率分别为47.0%和84.0%时,填砂管被注入盐沉析体系后,降水率分别为6.0%和4.0%,产气率分别增加6.0%和4.0%. 试验表明,盐沉析体系在一定条件下可以有效地封堵出水区域,达到控水稳气的目的。

关键词: 气藏, 调剖, 盐, 结晶

Abstract: In this paper, a method for plugging high permeability zones by salt precipitation is presented for the purpose of enhancing gas recovery. The effects of NaCl concentration, ethyl alcohol augmentation, induction agent and additive on the salt precipitation property are tested under normal temperature. The physical modeling experiment shows that when the water production rates are 47.0% and 84.0%, respectively, the injection of salt precipitation system into sand packing tube allows the water control rate to reach 6.0% and 4.0%, gas production rate to be 6.0% and 4.0% , correspondingly. It is proved that the salt precipitation system can effectively plug the water producing zones, hence keeping the gas production stable in a certain condition.

Key words: gas pool, profile modification, salt, crystallization

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