无碱二元体系的黏弹性和界面张力对水驱残余油的作用

doi:10.7623/syxb200801023

石油学报 ›› 2008, Vol. 29 ›› Issue (1): 106-110,115.DOI: 10.7623/syxb200801023

无碱二元体系的黏弹性和界面张力对水驱残余油的作用

夏惠芬¹, 王刚^1,2, 马文国¹, 刘春德³, 王彦伟⁴

1. 大庆石油学院提高油气采收率教育部重点实验室, 黑龙江大庆, 163318;
2. 大庆油田有限责任公司技术发展部, 黑龙江大庆, 163453;
3. 中国石油勘探开发研究院, 北京, 100083;
4. 大庆职业学院, 黑龙江大庆, 163255

收稿日期:2007-04-18 修回日期:2007-06-30 出版日期:2008-01-25 发布日期:2010-05-21
作者简介:夏惠芬,女,1962年7月生,2001年获大庆石油学院博士学位,现为大庆石油学院石油工程学院教授,主要从事提高采收率原理与技术的研究工作.E-mail:xiahuifen1948@126.com
基金资助:
国家自然科学基金重点项目(No.50634020)“低渗透油层提高驱油效率的机理研究”;黑龙江省自然科学基金项目(E200621)联合资助

Influence of viscoelasticity and interfacial tension of non-alkali binary compound solution on recovery efficiency of residual oil after water flooding

XIA Huifen¹, WANG Gang^1,2, MA Wenguo¹, LIU Chunde³, WANG Yanwei⁴

1. Key Laboratory for Enhancing Oil and Gas Recovery of the Ministry of Education, Daqing Petroleum Institute, Daqing163318, China;
2. Department of Science and Technology Development, PetroChina Daqing Oilfield Limited Company, Daqing 163712, China;
3. PetroChina Exploration and Development Research Institute,Beijing 100083,China;
4. Daqing Vocational College,Daqing 163255,China

Received:2007-04-18 Revised:2007-06-30 Online:2008-01-25 Published:2010-05-21

摘要/Abstract

摘要： 三元复合驱含碱驱油体系会大幅度降低聚合物溶液的黏弹性,引起地层粘土分散和运移、形成碱垢及导致地层渗透率下降。为此提出利用不加碱可形成超低界面张力的聚合物/甜菜碱表面活性剂二元复合体系驱油。通过流变性实验及微观模型驱油实验,分析了表面活性剂对聚合物表面活性剂二元复合体系黏弹性的影响和聚合物表面活性剂二元复合体系的黏弹性及界面张力对采收率的影响。对聚合物表面活性剂二元复合体系提高水驱后残余油采收率机理的研究表明:在驱替水驱后残余油过程中,聚合物表面活性剂二元复合体系利用了聚合物溶液的黏弹特性和表面活性剂的超低张力界面特性,水驱后残余油以油丝和乳状液形式被携带和运移,随着二元驱油体系的黏弹性的增加和界面张力的降低,水驱后二元驱后的采收率增加,降低界面张力的驱油效果(指达到超低)比提高体系的黏弹性的效果更明显。

关键词: 聚合物驱油, 聚合物/表面活性剂二元复合体系, 黏弹性, 界面张力, 残余油, 采收率, 流变性

Abstract: The alkali in the alkali-surfactant-polymer(ASP) flooding system could reduce the viscoelasticity of the polymer solution,which results in the dispersion and migration of clay and the scaling of alkali in the formation and reduction of reservoir permeability.A new surfactant-polymer binary compound system(SP) without alkali was proposed and used to attain ultra-low interfacial tension of oil.The influence of surfactant on the viscoelasticity of surfactant-polymer compound system was analyzed by rheology experiment and the microscopic oil displacement experiment.The effects of viscoelasticity and interfacial tension of SP compound system on recovery efficiency were discussed.The mechanism for enhancing the recovery efficiency of residual oil in SP compound system after water flooding indicated that the mobility control of polymer and the ultra-low interfacial tension of the surfactant could be fully utilized and the residual oil after water flooding was carried out and migrated in the form of "oil thread" and emulsion drops during the displacement of residual oil after water flooding.The recovery efficiency of SP flooding after water flooding increased with the increase of viscoelasticity and the decrease of interfacial tension.Oil displacement effect of reducing interfacial tension(aiming to the ultralow interfacial tension) was more obvious than that of enhancing viscoelasticity of SP compound system.

Key words: polymer flooding, polymer-surfactant binary compound system, viscoelasticity, interfacial tension, residual oil, recovery efficiency, rheological property

中图分类号:

TE357.46

夏惠芬, 王刚, 马文国, 刘春德, 王彦伟. 无碱二元体系的黏弹性和界面张力对水驱残余油的作用[J]. 石油学报, 2008, 29(1): 106-110,115.

XIA Huifen, WANG Gang, MA Wenguo, LIU Chunde, WANG Yanwei. Influence of viscoelasticity and interfacial tension of non-alkali binary compound solution on recovery efficiency of residual oil after water flooding[J]. Editorial office of ACTA PETROLEI SINICA, 2008, 29(1): 106-110,115.

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无碱二元体系的黏弹性和界面张力对水驱残余油的作用

Influence of viscoelasticity and interfacial tension of non-alkali binary compound solution on recovery efficiency of residual oil after water flooding

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