重复剪切对含油泡沫性质影响规律研究

doi:10.11885/j.issn.1674-5086.2021.05.26.02

西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (5): 164-172.DOI: 10.11885/j.issn.1674-5086.2021.05.26.02

重复剪切对含油泡沫性质影响规律研究

孙琳¹, 吴艳平¹, 张永昌², 陈德全¹, 蒲万芬¹

1. 油气藏地质及开发工程全国重点实验室·西南石油大学, 四川成都 610500;
2. 中国石油长庆油田分公司第九采油厂, 宁夏银川 750006

收稿日期:2021-05-26 发布日期:2023-10-28
通讯作者: 孙琳,E-mail:slswpu@163.com
作者简介:孙琳,1982年生,女,汉族,四川南充人,副教授,博士,主要从事提高采收率技术机理、体系配方及应用等方面的研究。E-mail:slswpu@163.com;吴艳平,1995年生,女,汉族,山东菏泽人,硕士研究生,主要从事泡沫驱提高采收率方面的研究。E-mail:1156345619@qq.com;张永昌,1995年生,男,汉族,甘肃平凉人,硕士研究生,主要从事凝胶评价、泡沫驱提高采收率等方面的研究工作。E-mail:1107199861@qq.com;陈德全,1996年生,男,汉族,四川广安人,硕士研究生,主要从事泡沫驱提高采收率方面的研究。E-mail:1458760556@qq.com;蒲万芬,1962年生,女,汉族,四川南充人,教授,博士研究生导师,主要从事提高采收率技术及油田化学方面的教学与科研工作。E-mail:pwf58@163.com
基金资助:
国家自然科学基金（51904256）

Effect of Repeated-shear on Properties of Oil-containing Foam

SUN Lin¹, WU Yanping¹, ZHANG Yongchang², CHEN Dequan¹, PU Wanfen¹

1. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. No. 9 Oil Production Plant, Changqing Oilfield Company, PetroChina, Yinchuan, Ningxia 750006, China

Received:2021-05-26 Published:2023-10-28

摘要/Abstract

摘要： 多孔介质中，含油泡沫处于破裂与再生的动态平衡。利用Waring Blender法对原油与两性离子表面活性剂（RC）溶液进行重复剪切模拟含油泡沫再生，深入研究RC溶液与不同含量原油（0~60%）作用后，溶液性质及其再生泡沫起泡能力与稳定性的变化规律。结果表明，RC分子在油相及油水界面分配令起泡体系中的RC质量分数显著下降（最大降幅达到72%），原油在RC胶束中增溶令液膜稳定性明显减弱，两者共同作用下，RC溶液的再生泡沫性能严重受损。含油量40%以内，随含油量增加，一次剪切含油泡沫的析液半衰期不断延长直至无油泡沫的2.4倍，而二次剪切含油泡沫的析液半衰期持续降低直至无油泡沫的27%。二次剪切时，由于油水界面张力降低造成油相被乳化为大量小尺寸油滴，无法阻碍排液且易随水相析出，液膜内油量减少，二次剪切含油泡沫的泡沫半衰期与一次剪切含油泡沫相差较小。研究有助于进一步认识含油泡沫的再生行为，并对耐油起泡体系的构建具有积极意义。

关键词: 含油泡沫, 重复剪切, 增溶油, 界面张力, 泡沫稳定性

Abstract: In porous media, oil-containing foam is in a dynamic balance between rupture and regeneration. Waring Blender method was used to simulate the regeneration of oil-containing foam by repeatedly shearing zwitterionic surfactant solution (RC) with crude oil. We focused on the solution properties and the change of foaming ability and foam stability after RC solution interaction with different contents of crude oil (0~60%). The results showed that the distribution of RC molecules in the oil phase and at the oil-water interface significantly decreased RC concentration in the foaming system (up to 72%), and the solubilization of crude oil in RC micelles markedly weakened the stability of foam films. Therefore, the performance of regenerated foam from RC solutions was severely damaged. Within an oil content below 40%, as the oil content increased, the foam drainage half-life for the first-sheared oil-containing foam continuously extended to 2.4 times that of the oil-free foam, while for the twice-sheared foam it decreased to 27% of the oil-free foam. During the secondary shearing, the oil phase was emulsified into a large number of small oil droplets due to the reduced oil-aqueous interfacial tension, which could not hinder the drainage and drained easily with water phase. As a result, the oil content in the foam film reduced, and there was little difference between half-lives for first-sheared and twice-sheared oil-containing foams. The research results are expected to provide new insight into the regeneration behavior of oil-contenting foam and contribute to the formulation of oil-tolerant foam system. This study provides new insight into the regeneration behavior of oil-contenting foam, and will contribute to the formulation of oil-tolerant foam system.

Key words: oil-containing foam, repeated-shear, solubilized oil, interfacial tension, foam stability

中图分类号:

TE357

孙琳, 吴艳平, 张永昌, 陈德全, 蒲万芬. 重复剪切对含油泡沫性质影响规律研究[J]. 西南石油大学学报(自然科学版), 2023, 45(5): 164-172.

SUN Lin, WU Yanping, ZHANG Yongchang, CHEN Dequan, PU Wanfen. Effect of Repeated-shear on Properties of Oil-containing Foam[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(5): 164-172.

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重复剪切对含油泡沫性质影响规律研究

Effect of Repeated-shear on Properties of Oil-containing Foam

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