新疆石油地质

新疆石油地质 ›› 2003, Vol. 24 ›› Issue (5): 438-440.

• 油藏工程 • 上一篇    下一篇

弱碱水复合驱提高采收率实验

唐善法1, 赵华廷2, 周兰芳1, 赵普春2   

  1. 1.江汉石油学院 石油与材料工程学院,湖北 荆州 434023;
    2.中原石油勘探局 采油三厂,河南 濮阳 457000
  • 收稿日期:2002-11-26 修回日期:2003-03-04 发布日期:2021-01-14
  • 作者简介:唐善法(1965-), 男,湖北公安人,副教授,应用化学与三次采油;联系电话:0716-8430457

EOR Experiment by Alkalescent Water Compound Flooding

TANG Shan-fa1, ZHAO Hua-ting2, ZHOU Lan-fang1, ZHAO Pu-chun2   

  1. 1. Jianghan Petroleum Institute, Jinzhou, Hubei, 434023, China;
    2. No.3 Oil Production Plant, Zhongyuan Petroleum Exploration Bureau, Puyang, Henan 457000, China
  • Received:2002-11-26 Revised:2003-03-04 Published:2021-01-14

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摘要： 针对中原油田实施“水质改性技术”后其注入水已由弱酸性变为弱碱性（pH≥8.0）和马寨卫95块油藏矿化度及Ca2+、Mg2+含量高、原油酸值低的特点,提出了在改性注入弱碱水中复配抗盐性表面活性剂等实施弱碱水复合驱提高油层采收率的观点。通过表面活性剂在弱碱水中溶解性及其复合体系油水界面张力的研究;确立了适用于卫95块油层生产条件的复合驱配方体系。驱油实验表明,JJ867、JJ869两种复合驱配方体系可分别提高采收率9.3%和14.3%.

关键词: 矿化度, 碱性, 化学驱, 表面活性剂, 采收率

Abstract: In light of the fact that following implementation of water quality improvement technology, water injected in oilfield has become alkalescent water (pH≥8.0) from slight acidic water, Mazhai Wei-95 Block reservoir is of high salinity, Ca2+, Mg2+ con-tents and low acid value in Zhongyuan oilfield, this paper presents a concept of alkalescent water compound flooding for EOR, adding salt-resisting surfactant into injected alkalescent water. By testing resolvable property of the surfactant in alkalescent water and oil-water interfacial tension in compound system, two compound flooding systems (JJ867 and JJ869) suitably applied in Mazhai Wei-95 Block reservoir production conditions are prepared. The oil displacement experiment shows that using these two systems can get incremental oil recovery factors of 9.3% and 14.3%, respectively.

Key words: salinity, alkalescent, chemical flooding, surfactant, EOR

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