石油化工高等学校学报

石油化工高等学校学报 ›› 2018, Vol. 31 ›› Issue (01): 35-42.DOI: :10.3969/j.issn.1006-396X.2018.01.007

• 油田化学 • 上一篇    下一篇

弱碱三元复合驱增油效果影响因素及其作用机理研究

孙 哲1,2,3,卢祥国4,孙学法4,周彦霞4   

  1. 1.海洋石油高效开发国家重点实验室,北京100028;2.中海油研究总院有限责任公司,北京100028; 3.中国石油大学(北京)石油工程学院,北京102249;4.东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318
  • 收稿日期:2016-11-01 修回日期:2016-11-21 出版日期:2018-02-28 发布日期:2018-02-27
  • 作者简介::孙哲(1988-),女,博士研究生,工程师,从事提高采收率技术研究;E-mail:sunzhe1988dqyt@126.com。
  • 基金资助:
    :国家自然科学基金资助项目(51574086);东北石油大学研究生创新科研项目(YJSCX2015-010NEPU);大庆油田重点科技攻关课题经费资助(DQYT-0505003-2015-JS-370)。

Research on the Influence Factors of Weak-Base Ternary Compound  System on Oil Incremental Effect and Its Action Mechanism

Sun Zhe1,2,3, Lu Xiangguo4, Sun Xuefa4, Zhou Yanxia4   

  1. 1. State Key Laboratory of Offshore Oil Exploitation, Beijing 100028, China;  [JP2]2. China National Offshore Oil Corporation (CNOOC) Research Institute Limited Liability Company, Beijing 100028, China; 3. Department of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China; 4. Key Laboratory of Enhanced Oil Recovery of Ministry Education, Northeast Petroleum University, Daqing Heilongjiang 163318, China
  • Received:2016-11-01 Revised:2016-11-21 Published:2018-02-28 Online:2018-02-27

摘要: 以大庆储层地质特征和流体性质为模拟研究对象,以注入压力和采收率为评价指标,开展了聚合物溶液和弱碱三元复合体系渗流特性和驱油效果实验研究和作用机理分析。结果表明,在驱油剂黏度和段塞尺寸相同条件下,与聚合物驱相比,弱碱三元复合驱过程中存在乳化作用和贾敏效应,造成渗流阻力增加和注入压力升高,加之自身较强洗油能力,因此采收率增幅较大。与除垢水三元复合体系相比较,污水三元复合体系中含有碳酸盐微颗粒,它在多孔介质内发生滞留,产生附加渗流阻力和液流转向效果,最终导致采收率增幅较大。与恒速实验相比较,恒压实验采用峰值压力时间早,造成药剂在岩心高渗透层中推进速度加快,突破时间较早,波及效率和洗油效率降低。

关键词: 弱碱三元复合驱, 聚合物溶液, 乳化作用, 贾敏效应, 机理分析

Abstract: This paper researches the seepage characteristics and oil displacement effect of polymer solution and weak-base ternary compound system, taking the reservoir geology and fluid from Daqing Oilfield as research object, taking injectionpressure and oil recovery as the evaluation indexes. Results show that, under the condition of the same oil displacement agent viscosity and slug size, the oil recovery increment of weak-base ASP flooding is larger than that of polymer flooding. Because there are emulsification and Jamin effect during weak-base ASP flooding, which can increase seepage resistance and injection-pressure, and its oil sweep efficiency is also higher. Compared with ternary compound system with scaleremoval water, there are carbonate micro particles in the sewage ternary compound system, which can be detained in porous media. This can increase seepage resistance and cause fluid diversion effect, which eventually leads to a large increase in oil recovery. Compared with constant-speed experiment, it is early for constantpressure experiment to adopt peak-pressure, which accelerates the forward speed of agent in the core high permeability layer and shortens the breakthrough time. As a result, the sweep efficiency and oil displacement efficiency of constantpressure experiment is lower.

Key words: Weak-base ternary compound system, Polymer solution, Emulsification, Jamin effect, Mechanism analysis

引用本文

孙 哲,卢祥国,孙学法,周彦霞. 弱碱三元复合驱增油效果影响因素及其作用机理研究[J]. 石油化工高等学校学报, 2018, 31(01): 35-42.

Sun Zhe, Lu Xiangguo, Sun Xuefa, Zhou Yanxia. Research on the Influence Factors of Weak-Base Ternary Compound  System on Oil Incremental Effect and Its Action Mechanism[J]. Journal of Petrochemical Universities, 2018, 31(01): 35-42.

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