低频波强化泡沫微观驱油特征

doi:10.7623/syxb202302011

石油学报 ›› 2023, Vol. 44 ›› Issue (2): 358-368.DOI: 10.7623/syxb202302011

低频波强化泡沫微观驱油特征

刘静^1,2, 夏军勇³, 孙秋分⁴, 李正斌^1,2, 夏雷^1,2, 吴飞鹏^1,2, 蒲春生^1,2

1. 中国石油大学(华东)石油工程学院山东青岛 266580;
2. 中国石油大学(华东)非常规油气开发教育部重点实验室山东青岛 266580;
3. 大庆油田有限责任公司采油工程研究院黑龙江大庆 163453;
4. 中国石油杭州地质研究院浙江杭州 310023

收稿日期:2021-04-20 修回日期:2022-01-02 出版日期:2023-02-25 发布日期:2023-03-08
通讯作者: 刘静,女,1982年6月生,2013年获中国石油大学(华东)博士学位,现为中国石油大学(华东)副教授,主要从事非常规油气藏物理生态化学强化开采理论与技术方面的研究工作。
作者简介:刘静,女,1982年6月生,2013年获中国石油大学(华东)博士学位,现为中国石油大学(华东)副教授,主要从事非常规油气藏物理生态化学强化开采理论与技术方面的研究工作。Email:liujing4522009@163.com
基金资助:
国家自然科学基金项目(No.51904320,No.51874339)资助。第一作者及

Characteristics of microscopic oil displacement under low-frequency wave excitation by foam flooding

Liu Jing^1,2, Xia Junyong³, Sun Qiufen⁴, Li Zhengbin^1,2, Xia Lei^1,2, Wu Feipeng^1,2, Pu Chunsheng^1,2

1. School of Petroleum Engineering, China University of Petroleum, Shandong Qingdao 266580, China;
2. Key Laboratory of Unconventional Oil&Gas Development, China University of Petroleum, Shandong Qingdao 266580, China;
3. Oil Production Engineering Research Institute, Daqing Oilfield Limited Company, Heilongjiang Daqing 163453, China;
4. PetroChina Hangzhou Research Institute of Geology, Zhejiang Hangzhou 310023, China

Received:2021-04-20 Revised:2022-01-02 Online:2023-02-25 Published:2023-03-08

摘要/Abstract

摘要： 为探究低频波激励下泡沫对水驱残余油的驱替特征,基于微观非均质模型,开展了低频波激励下泡沫驱油实验,剖析了低频波强化泡沫驱油的机理及效果。研究结果表明:低频波通过提高泡沫稳定性、形成局部压力扰动、降低壁面吸附力等作用提高泡沫波及系数和驱油效果,且低频波激励下泡沫驱微观驱油效率提高6.78 % 。与单一泡沫驱相比,低频波激励下泡沫驱替柱状残余油的方式是泡沫沿着孔隙壁面逐渐向孔隙另一侧通过"层层剥离—少量乳化—稳定运移"实现残余油的有效驱替,提高了原油脱离基质壁面及孔隙喉道的速度。对于盲端残余油,低频波激励下增加了泡沫在盲端入口处的扰动,改变了泡沫在盲端局部处的流动方向,为泡沫流入盲端创造了有利条件;对于连片残余油,低频波减缓了泡沫驱替过程中的突进现象,提高了泡沫在小孔隙中的有效波及和驱替效果。

关键词: 低频波, 强化泡沫驱, 波及系数, 微观驱油特征, 驱油机理

Abstract: To investigate the characteristics about the displacement of residual oil by foams after water flooding under low-frequency wave excitation, a foam-facilitated oil displacement experiment under low-frequency wave excitation was performed based on the microscopic inhomogeneous model, and the mechanism and effect of foam-facilitated oil displacement reinforced by low-frequency wave were analyzed. The results show that the low-frequency wave improves the sweep coefficient and oil displacement effect of foam flooding by improving the foam stability, creating local pressure disturbance, and reducing the wall adsorption capability, and the microscopic oil displacement efficiency is increased by 6.78 % under the low-frequency wave excitation. Compared with single foam flooding, the way for the displacement of column residual oil by foams under low-frequency wave excitation is that foams gradually move along the pore wall to the other side of the pore to achieve the effective displacement of residual oil through layer stripping, a small amount of emulsification and stable transportation, which improves the speed of crude oil migration from the matrix wall and the pore throat. For the residual oil at the blind end, the low-frequency wave excitation increases the foam disturbance at the entrance to the blind end, changes the flow direction of foams at the blind end, and creates favorable conditions for the foam flow into the blind end; for the continuous flake residual oil, the low-frequency wave slows down the abrupt advance in the foam flooding process, and improves the sweep efficiency and displacement effect of foam flooding in the small pore space.

Key words: low-frequency wave, enhanced foam displacement, wave penetration coefficient, microscopic oil displacement characteristics, oil displacement mechanism

中图分类号:

TE357

刘静, 夏军勇, 孙秋分, 李正斌, 夏雷, 吴飞鹏, 蒲春生. 低频波强化泡沫微观驱油特征[J]. 石油学报, 2023, 44(2): 358-368.

Liu Jing, Xia Junyong, Sun Qiufen, Li Zhengbin, Xia Lei, Wu Feipeng, Pu Chunsheng. Characteristics of microscopic oil displacement under low-frequency wave excitation by foam flooding[J]. Acta Petrolei Sinica, 2023, 44(2): 358-368.

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低频波强化泡沫微观驱油特征

Characteristics of microscopic oil displacement under low-frequency wave excitation by foam flooding

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