Pore-Scale Numerical Simulation of CO2-Oil Two-Phase Flow: A Multiple-Parameter Analysis Based on Phase-Field Method
文献类型：期刊论文
| 作者 | Song, Rui1,4; Tang, Yu1; Wang, Yao3; Xie, Ruiyang2; Liu, Jianjun4 |
| 刊名 | ENERGIES
 |
| 出版日期 | 2023 |
| 卷号 | 16期号:1页码:- |
| 关键词 | CO2 flooding two-phase flow phase-field method wettability capillary number |
| 英文摘要 | A deep understanding of the pore-scale fluid flow mechanism during the CO2 flooding process is essential to enhanced oil recovery (EOR) and subsurface CO2 sequestration. Two-phase flow simulations were performed to simulate the CO2 flooding process based on the phase-field method in this study. Two-dimensional models with random positions and sizes of grains of circular shape were constructed to reproduce the topology of porous media with heterogeneous pore size distributions in the reservoir rock. A multiple-parameter analysis was performed to investigate the effects of capillary number, viscosity ratio, wettability, density, gravity, interfacial tension, and absolute permeability on the two-phase fluid flow characteristics. The results indicated that when the capillary number and viscosity ratio were large enough, i.e., log Ca = -3.62 and log M = -1.00, the fingering phenomenon was not obvious, which could be regarded as a stable displacement process. CO2 saturation increased with the increase in the PV value of the injected CO2. Once the injected CO2 broke through at the outlet, the oil recovery efficiency approached stability. Two types of broken behaviors of the fluids were observed during the wettability alternation, i.e., snap-off and viscous breakup. Snap-off occurred when capillary forces dominated the fluid flow process, while viscous breakup occurred with a low viscosity ratio. With a low capillary number, the flooding process of the injected CO2 was mainly controlled by the capillary force and gravity. With the decrease in the interfacial tension between the fluids and the increase in the permeability of the porous media, the recovery of the displaced phase could be enhanced effectively. In the mixed-wet model, with the increase in the percentage of the nonoil-wetted grains, the intersecting point of the relative permeability curve moved to the right and led to a higher oil recovery. |
| 学科主题 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000909109600001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35200]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China 2.School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, China 3.School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China 4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
| 推荐引用方式 GB/T 7714 | Song, Rui,Tang, Yu,Wang, Yao,et al. Pore-Scale Numerical Simulation of CO2-Oil Two-Phase Flow: A Multiple-Parameter Analysis Based on Phase-Field Method[J]. ENERGIES,2023,16(1):-. |
| APA | Song, Rui,Tang, Yu,Wang, Yao,Xie, Ruiyang,&Liu, Jianjun.(2023).Pore-Scale Numerical Simulation of CO2-Oil Two-Phase Flow: A Multiple-Parameter Analysis Based on Phase-Field Method.ENERGIES,16(1),-. |
| MLA | Song, Rui,et al."Pore-Scale Numerical Simulation of CO2-Oil Two-Phase Flow: A Multiple-Parameter Analysis Based on Phase-Field Method".ENERGIES 16.1(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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