油滴的宏观聚并机制及油膜分子之间的微观相互作用研究

doi:10.3969/j.issn.1006-6535.2023.01.023

特种油气藏 ›› 2023, Vol. 30 ›› Issue (1): 161-168.DOI: 10.3969/j.issn.1006-6535.2023.01.023

油滴的宏观聚并机制及油膜分子之间的微观相互作用研究

黄斌^1,2, 南晓函¹, 王一竹³, 傅程⁴, 朱月明⁵, 张璐¹, 郭伟¹, 王思琪¹

1.东北石油大学,黑龙江大庆 166318;
2.中国石油大庆油田有限责任公司,黑龙江大庆 163413;
3.中国石油玉门油田分公司,甘肃酒泉 735000;
4.重庆科技学院,重庆 401331;
5.国家管网集团哈尔滨分公司,黑龙江哈尔滨 150010

收稿日期:2022-04-24 修回日期:2022-07-04 出版日期:2023-02-25 发布日期:2023-03-24
作者简介:黄斌(1982—),男,教授,2004年毕业于大庆石油学院石油工程专业,2013年毕业于东北石油大学石油与天然气工程专业,获博士学位,现从事化学驱提高油气采收率、油气田采出液处理方面的研究工作。
基金资助:
国家自然科学基金“驱油剂作用下水中油滴的微观聚结行为及聚并机理研究”(51974088);黑龙江省东北石油大学优秀科研人才培育基金“气井井筒内气液强制旋流特性及衰减机制研究”(SJQHB202102)

Study of Macroscopic Aggregation Mechanism of Oil Droplets and Microscopic Interactions Between Oil Film Molecules

Huang Bin^1,2, Nan Xiaohan¹, Wang Yizhu³, Fu Cheng⁴, Zhu Yueming⁵, Zhang Lu¹, Guo Wei¹, Wang Siqi¹

1. Northeast Petroleum University, Daqing, Heilongjiang 166318, China;
2. PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163413, China;
3. PetroChina Yumen Oilfield Company, Jiuquan, Gansu 735000, China;
4. Chongqing University of Science and Technology, Chongqing 401331, China;
5. PipeChina Harbin Company, Harbin, Heilongjiang 150010, China

Received:2022-04-24 Revised:2022-07-04 Online:2023-02-25 Published:2023-03-24

摘要/Abstract

摘要： 为研究油滴聚并过程中油滴之间的微观相互作用,通过有限元模拟方法,结合乳状液稳定性实验与分子动力学模拟技术,研究了油井采出液中乳化油滴的聚并行为,并分析了油滴聚并的影响因素。研究结果表明:2个油滴在聚并过程中液膜位置处流体流速较高,聚并完成后达到稳定;油滴尺寸与聚并时间并不存在明显的对应关系,当2个油滴半径不同时,较大的油滴移动位移较小;初始时刻,油膜和水相之间存在明显的界限;碳链越长,乳状液越稳定,在碳原子数量相同的条件下,原油组分对乳状液稳定性的影响由小到大为饱和烃、碳碳双键、碳碳三键、环烷烃;沥青质含量升高是造成乳状液体系乳化能力和乳化稳定性增强的主要原因。该研究对提高原油油水分离效率,降低原油储运成本有重要意义。

关键词: 乳状液, 乳化油滴, 聚并机制, 微观特征, 原油组分, 分子动力学

Abstract: In order to study the microscopic interactions between oil droplets in the process of oil droplet coalescence, the coalescence behavior of emulsified oil droplets in oil well recovery fluid was studied by finite element simulation method, in combination with the emulsion stability experiments and molecular dynamics simulation technology, and the influencing factors of oil droplet coalescence were analyzed. The study results show that the fluid flow rate is relatively high at the location of the liquid film during the coalescence of the 2 oil droplets, and reaches stability after the coalescence is completed. There is no obvious correspondence between the size of oil droplets and the coalescence time, and when the radii of 2 oil droplets are different, the larger droplets move less; at the initial moment, there is an obvious boundary between oil film and water phase; the longer the carbon chain, the more stable the emulsion; under the condition of the same number of carbon atoms, the influence of crude oil components on the stability of emulsion is from small to large for saturated hydrocarbons, carbon-carbon double bonds, carbon-carbon triple bonds, and cycloalkanes; the increase of asphaltene content is the main reason for the increase of emulsification capacity and emulsion stability of emulsion system. This study is of great significance to improve the oil-water separation efficiency of crude oil and reduce the cost of crude oil storage and transportation.

Key words: emulsion, emulsified oil droplet, coalescence mechanism, microscopic characteristics, crude oil components, molecular dynamics

中图分类号:

TE928

黄斌, 南晓函, 王一竹, 傅程, 朱月明, 张璐, 郭伟, 王思琪. 油滴的宏观聚并机制及油膜分子之间的微观相互作用研究[J]. 特种油气藏, 2023, 30(1): 161-168.

Huang Bin, Nan Xiaohan, Wang Yizhu, Fu Cheng, Zhu Yueming, Zhang Lu, Guo Wei, Wang Siqi. Study of Macroscopic Aggregation Mechanism of Oil Droplets and Microscopic Interactions Between Oil Film Molecules[J]. Special Oil & Gas Reservoirs, 2023, 30(1): 161-168.

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油滴的宏观聚并机制及油膜分子之间的微观相互作用研究

Study of Macroscopic Aggregation Mechanism of Oil Droplets and Microscopic Interactions Between Oil Film Molecules

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