岩性油气藏 ›› 2017, Vol. 29 ›› Issue (3): 152–158.doi: 10.3969/j.issn.1673-8926.2017.03.019

• 石油工程 • 上一篇    下一篇

针对A油田的抗温、抗盐聚合物/表面活性剂二元复合驱油体系研究

刘晨1,2, 王凯1,2, 王业飞3, 周文胜1,2   

  1. 1. 海洋石油高效开发国家重点实验室, 北京 100027;
    2. 中海油研究总院, 北京 100027;
    3. 中国石油大学(华东) 石油工程学院, 山东 青岛 266555
  • 收稿日期:2016-04-25 修回日期:2016-06-02 出版日期:2017-05-21 发布日期:2017-05-21
  • 作者简介:刘晨(1985-),男,硕士,工程师,主要从事油气田动态分析、提高采收率理论及技术等方面的研究工作。地址:(100027)北京市朝阳区太阳宫南街6号。Email:422810482@qq.com。
  • 基金资助:
    国家重大科技专项“海上稠油油田开发模式研究”（编号：2016ZX05025-001）资助

Polymer/surfactant binary flooding in A oilfield with high temperature and high salinity

LIU Chen1,2, WANG Kai1,2, WANG Yefei3, ZHOU Wensheng1,2   

  1. 1. State Key Laboratory of Offshore Oil Exploitation, Beijing 100027, China;
    2. CNOOC Research Institute, Beijing 100027, China;
    3. School of Petroleum Engineering, China University of Petroleum(East China), Qingdao 266555, Shandong, China
  • Received:2016-04-25 Revised:2016-06-02 Online:2017-05-21 Published:2017-05-21

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536

摘要： 常规聚合物/表面活性剂二元复合驱的地层适应性差、耐温抗盐能力有限，难以满足低渗、高温、高盐油藏进一步提高采收率的需求。针对这一难题，优选梳形聚合物和非离子-阴离子型表面活性剂构建了一种适用于低渗、高温、高盐油藏的二元复合驱油体系，并通过室内实验，系统考察了二元复合驱油体系的黏度、油水界面张力、老化稳定性、吸附量、色谱分离程度以及提高采收率能力等性能。结果表明：二元复合驱油体系可降低油水界面张力至10-3 mN/m数量级，同时具有稳定的增黏能力和良好的老化稳定性；二元复合驱油体系的协同作用使聚合物和表面活性剂在油田净砂表面的饱和静态吸附量均低于单一体系，能将表面活性剂在地层中的超低界面张力有效作用距离由19%延伸到27%，此外，还存在较强的色谱分离效应。针对A油田提出的二元复合驱油体系0.4 PV（1 000 mg/L HF62208+0.3% NPAC）对水测渗透率为18.6~62.5 mD的天然岩心的采收率提高幅度达到11%以上，驱油效果优良。

关键词: 致密砂岩油藏, 可回收稠化水, 体积压裂, 长6油层组, 鄂尔多斯盆地

Abstract: Aiming at weak formation adaptability and limited temperature resistance of common polymer/surfactant system,which largely limits its application in low-permeability,high-temperature and high salinity reservoir, a binary flooding system was established based on the combination of polymer and anionic-nonionic surfactant. Through laboratory experiments,the performances of the binary flooding system were studied,such as viscosity, interfacial tension,aging stability,adsorption capacity,chromatographic fractionation effect and oil displacement efficiency. The results show that the interfacial tension between the system and the crude oil could be lowered to 10-3 mN/m while maintaining excellent stability. The saturated adsorption value of the binary flooding system is much lower than that of single system. Meanwhile,the effective distance of ultra-low interfacial ten-sion of surfactant extended from 19% to 27%. However,the chromatographic fractionation effect was not negligible. The binary flooding system,which is 0.4 PV (1 000 mg/L HF62208+0.3% NPAC),can increase oil recovery by 11% on natural core with permeability of 18.6-62.5 mD from A oilfield, indicating excellent EOR performance for low-permeability reservoirs.

Key words: tight sandstone reservoir, recyclable thickened water, volume fracturing, Chang 6 reservoir, Ordos Basin

中图分类号: 

  • TE357
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