Numerical simulation of displacement characteristics of CO2 injected in pore-scale porous media

	Numerical simulation of displacement characteristics of CO2 injected in pore-scale porous media
	Zhu, Qianlin 1; Zhou, Qianlong 1; Li, Xiaochun 2
刊名	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
	2016
卷号	8 期号:1 页码:87
关键词	LEVEL SET METHOD 2-PHASE FLOW Level set method Displacement Pore-scale porous media Numerical simulation
ISSN号	1674-7755
英文摘要	Pore structure of porous media, including pore size and topology, is rather complex. In immiscible two-phase displacement process, the capillary force affected by pore size dominates the two-phase flow in the porous media, affecting displacement results. Direct observation of the flow patterns in the porous media is difficult, and therefore knowledge about the two-phase displacement flow is insufficient. In this paper, a two-dimensional (2D) pore structure was extracted from a sandstone sample, and the flow process that CO2 displaces resident brine in the extracted pore structure was simulated using the Navier-Stokes equation combined with the conservative level set method. The simulation results reveal that the pore throat is a crucial factor for determining CO2 displacement process in the porous media. The two-phase meniscuses in each pore throat were in a self-adjusting process. In the displacement process, CO2 preferentially broke through the maximum pore throat. Before breaking through the maximum pore throat, the pressure of CO2 continually increased, and the curvature and position of two-phase interfaces in the other pore throats adjusted accordingly. Once the maximum pore throat was broken through by the CO2, the capillary force in the other pore throats released accordingly; subsequently, the interfaces withdrew under the effect of capillary fore, preparing for breaking through the next pore throat. Therefore, the two-phase displacement in CO2 injection is accompanied by the breaking through and adjusting of the two-phase interfaces. (C) 2016 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. All rights reserved.
资助项目	[Key Laboratory of Coal-based CO2 Capture and Geological Storage, Jiangsu Province] ; [China and US Advanced Coal Technology Consortium]
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/26192]
专题	中科院武汉岩土力学所
作者单位	1.China University Min & Technol, Key Lab Coal Based Capture & Geol Storage CO2, Xuzhou 221008, Peoples R China 2.中国科学院
推荐引用方式 GB/T 7714	Zhu, Qianlin,Zhou, Qianlong,Li, Xiaochun. Numerical simulation of displacement characteristics of CO2 injected in pore-scale porous media[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2016,8(1):87.
APA	Zhu, Qianlin,Zhou, Qianlong,&Li, Xiaochun.(2016).Numerical simulation of displacement characteristics of CO2 injected in pore-scale porous media.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,8(1),87.
MLA	Zhu, Qianlin,et al."Numerical simulation of displacement characteristics of CO2 injected in pore-scale porous media".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 8.1(2016):87.