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考虑润湿性的双重非均质油藏聚合物驱微观渗流机理

The Micro-Flow Mechanism of Polymer Flooding in Dual Heterogeneous Reservoirs Considering the Wettability.

作者信息

Zhong Huiying, Shi Bowen, He Yuanyuan, Bi Yongbin, Zhao Yu, Xie Kun

机构信息

Key Laboratory for Enhanced Oil & Gas Recovery of the Ministry of Education, Northeast Petroleum University, Daqing 163318, China.

Jianghan Oilfield Company, SINOPEC, Qianjiang 430070, China.

出版信息

Polymers (Basel). 2023 Oct 23;15(20):4188. doi: 10.3390/polym15204188.

DOI:10.3390/polym15204188
PMID:37896432
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10611405/
Abstract

There have been some studies conducted about the single factor viscoelasticity of polymer solution or wettability effect on the micro-flow mechanism of polymer flooding. In this paper, the flow mechanism of polymer solution in dual heterogeneous reservoir considering the wettability and gravity was studied. The influences of wettability and rock particle shape on flow characteristics were studied based on the characteristics of saturation and pressure distribution. Compared with the simulation results of polymer flooding in three different rock particle shapes porous media, the oil displacement efficiency of the circular particle model is the highest at 91.57%, which is 3.34% and 11.48% higher than that in the hexagonal and diamond models, respectively. The influence of wettability was studied by the circular particle model. The oil displacement efficiency under water-wet conditions was higher than that under oil-wet conditions. The displacement process considering gravity was affected by the crossflow caused by gravity and viscous force, and the micro-oil displacement efficiency was 9.87% lower than that of non-gravity. Considering the wettability, vertical crossflow will be formed. The oil displacement efficiency under water-wet conditions was 3.9% higher than in oil-wet conditions. The research results can not only expand and enrich the micro-flow mechanism of viscoelastic polymer solution, but also provide reference and guidance for polymer flooding scheme design.

摘要

关于聚合物溶液的单因素粘弹性或润湿性对聚合物驱微观渗流机理的影响，已经开展了一些研究。本文研究了考虑润湿性和重力的聚合物溶液在双重非均质油藏中的渗流机理。基于饱和度和压力分布特征，研究了润湿性和岩石颗粒形状对渗流特性的影响。对比三种不同岩石颗粒形状多孔介质中聚合物驱的模拟结果，圆形颗粒模型的驱油效率最高，为91.57%，分别比六边形和菱形模型高3.34%和11.48%。采用圆形颗粒模型研究了润湿性的影响。水湿条件下的驱油效率高于油湿条件。考虑重力的驱替过程受重力和粘性力引起的横向流影响，微观驱油效率比不考虑重力时低9.87%。考虑润湿性时，会形成垂向横向流。水湿条件下的驱油效率比油湿条件高3.9%。研究结果不仅可以拓展和丰富粘弹性聚合物溶液的微观渗流机理，还可为聚合物驱方案设计提供参考和指导。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/9359de801166/polymers-15-04188-g017.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/9359de801166/polymers-15-04188-g017.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/5d4c6f81d065/polymers-15-04188-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/1993f5910b71/polymers-15-04188-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/8c531db88ea7/polymers-15-04188-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/3b86e037d0c3/polymers-15-04188-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/30b167bfe063/polymers-15-04188-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/6c7d44b81fce/polymers-15-04188-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da85/10611405/9359de801166/polymers-15-04188-g017.jpg

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