| Diffusion coefficient and the volume swelling of CO2/light oil systems: Insights from dynamic volume analysis and molecular dynamics simulation | |
| Luo, Yongcheng; Xiao, Hanmin; Liu, Xiangui; Zheng TY(郑太毅); Wu, Zhenkai | |
| Source Publication | JOURNAL OF MOLECULAR LIQUIDS
 |
| 2023-07-15 | |
| Volume | 382Pages:121943 |
| ISSN | 0167-7322 |
| Abstract | The oil volume expansion and CO2 diffusion are one of the main mechanism of CO2-enhanced oil recovery (CO2- EOR). This paper established a series of experiments, numerical simulations, and molecular dynamics (MD) simulations to describe mass transfer behaviors between oil-gas phases. Expressly, the CO2 diffusion coefficient and light oil swelling factor are signification parameters to quantify and analyze these behaviors. In detail, the CO2 diffusion coefficient and the oil swelling factor were obtained from the traditional pressure decay method and the advanced MD simulation. Synthetically, the pressure decay method and MD simulation results were mutually verified. The results showed that the equilibrium pressure was proportional to the mole fraction of CO2 and inversely proportional to the mole fraction of light oil. The equilibrium time was proportional to the mole fraction of CO2 and light oil. At the temperature of 333.15 K and the initial pressure of 7.5 MPa, the CO2 diffusion coefficient in light oil was positively correlated with the relative molar proportion of CO2, while the light oil swelling factor was vice versa. In addition, the closer to the CO2-light oil interface, the greater the light oil's potential energy and self-diffusion coefficient, and the stronger the transport ability. |
| Keyword | CO2-light oil system Diffusion coefficient Swelling factor Molecular dynamics simulation |
| DOI | 10.1016/j.molliq.2023.121943 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001010886100001 |
| WOS Research Area | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
| Funding Organization | CNPC basic advanced reserve technology [2021DJ2201] |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Xiao, HM (corresponding author), Univ Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang 065007, Peoples R China. ; Zheng, TY (corresponding author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/92398 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.{Luo Yongcheng, Xiao Hanmin, Liu Xiangui, Wu Zhenkai} Univ Chinese Acad Sci Coll Engn Sci Beijing 100049 Peoples R China 2.{Luo Yongcheng, Xiao Hanmin, Liu Xiangui, Wu Zhenkai} Univ Chinese Acad Sci Inst Porous Flow & Fluid Mech Langfang 065007 Peoples R China 3.{Zheng Taiyi} Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China 4.{Zheng Taiyi} Chinese Acad Sci Inst Mech Beijing 100190 Peoples R China |
| Recommended Citation GB/T 7714 | Luo, Yongcheng,Xiao, Hanmin,Liu, Xiangui,et al. Diffusion coefficient and the volume swelling of CO2/light oil systems: Insights from dynamic volume analysis and molecular dynamics simulation[J]. JOURNAL OF MOLECULAR LIQUIDS,2023,382:121943.Rp_Au:Xiao, HM (corresponding author), Univ Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang 065007, Peoples R China., Zheng, TY (corresponding author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
| APA | Luo, Yongcheng,Xiao, Hanmin,Liu, Xiangui,郑太毅,&Wu, Zhenkai.(2023).Diffusion coefficient and the volume swelling of CO2/light oil systems: Insights from dynamic volume analysis and molecular dynamics simulation.JOURNAL OF MOLECULAR LIQUIDS,382,121943. |
| MLA | Luo, Yongcheng,et al."Diffusion coefficient and the volume swelling of CO2/light oil systems: Insights from dynamic volume analysis and molecular dynamics simulation".JOURNAL OF MOLECULAR LIQUIDS 382(2023):121943. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2023Fa216.pdf（8257KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment