Microscopic Mechanism for the Displacement of Shale Oil in a Nanochannel by CO2 at Different Pressures DOI Creative Commons
Fengjiao Wang, Haiying Liao, Quanqi Dai

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: 10(16), P. 16319 - 16326

Published: April 16, 2025

Aiming at the problems of unclear utilization degree shale oil in different occurrence states. In this paper, CO2 displacement process under pressure conditions is simulated by molecular dynamics method, microscopic mechanism clarified, and influence on states revealed. The results show that cannot form an effective flow channel low (1 MPa), most water remain channel. molecules a bridge outlet pore break through medium (5 10 MPa). forms stable high (15 With increase pressure, kinetic energy gas increases. But limited system space, diffusion capacity system, miscibility, competitive adsorption effect all trend increasing first, then stabilizing, rapidly last. final recoveries are 33.24%, 75.82%, 64.69%, 83.03% conditions. Among them, miscibility adsorbed layer higher than free 1 MPa condition. And other This study can provide theoretical basis for efficient development oil.

Language: Английский

Mechanisms of CO2 huff and puff enhanced oil recovery and storage within shale nanopores DOI
Sen Wang, Mengqi Zhang, Yulong Zhang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 506, P. 160098 - 160098

Published: Jan. 1, 2025

Language: Английский

Citations

1
Applications of molecular dynamics simulation in studying shale oil reservoirs at the nanoscale: Advances, challenges and perspectives DOI Creative Commons
Lu Wang, Yifan Zhang,

Run Zou

et al.

Petroleum Science, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

Citations

4
The critical role of temperature on the CO2 replacement characteristics within inorganic minerals in shale oil reservoirs DOI
Jiren Tang, Juan Zhang, Yunzhong Jia

et al.

Journal of Molecular Liquids, Journal Year: 2025, Volume and Issue: 421, P. 126865 - 126865

Published: Jan. 6, 2025

Language: Английский

Citations

0
Application of Molecular Dynamics Simulation in CO2-EOR and CO2 Geological Storage: A Review DOI
Yuanxiu Sun, Yijie Ma, Feng Yang

et al.

Geoenergy Science and Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 213894 - 213894

Published: April 1, 2025

Language: Английский

Citations

0
Investigating the Synergistic Impact of CCUS-EOR DOI Creative Commons
Zhenhua Rui, Tingting Liu, Xin Wen

et al.

Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

0
Enhanced Oil Recovery Mechanism Mediated by Reduced Miscibility Pressure Using Hydrocarbon-Degrading Bacteria During CO2 Flooding in Tight Oil Reservoirs DOI Creative Commons
Chengjun Wang, Xinxin Li, Jing Xia

et al.

Energies, Journal Year: 2025, Volume and Issue: 18(5), P. 1123 - 1123

Published: Feb. 25, 2025

CO2 flooding technology for tight oil reservoirs not only effectively addresses the challenge of low recovery rates, but also facilitates geological sequestration, thereby achieving dual objective enhanced utilization and secure storage. However, in development continental sedimentary reservoirs, high content heavy hydrocarbons crude leads to an elevated minimum miscibility pressure (MMP) between CO2, limiting process non-miscible flooding. Conventional physical chemical methods, although effective reducing MMP, are often associated with costs, environmental concerns, limited efficacy. To address these challenges, we propose a novel approach utilizing petroleum hydrocarbon-degrading bacteria (PHDB) biodegrade oil. This method alters composition oil, lowering MMP during flooding, facilitating transition from miscible enhancing recovery. Results demonstrated that, after 7 days cultivation, selected PHDB achieved degradation efficiency 56.4% significantly hydrocarbon content. The relative light-saturated increased by 15.6%, carbon atom molar percentage decreased C8 C6. Following biodegradation process, lightened was reduced 20.9%. Core flood experiments indicated that improved 17.7% compared conventional research provides technical green cost-effective immiscible

Language: Английский

Citations

0
Molecular insights into CO2-EOR/CCUS: Nanoconfinement effects on multi-component diffusion and miscibility in shale reservoirs DOI
Yisheng Hu, Heng Wang,

Ping Guo

et al.

Fuel, Journal Year: 2025, Volume and Issue: 395, P. 135238 - 135238

Published: April 4, 2025

Language: Английский

Citations

0
Microscopic Mechanism for the Displacement of Shale Oil in a Nanochannel by CO2 at Different Pressures DOI Creative Commons
Fengjiao Wang, Haiying Liao, Quanqi Dai

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: 10(16), P. 16319 - 16326

Published: April 16, 2025

Aiming at the problems of unclear utilization degree shale oil in different occurrence states. In this paper, CO2 displacement process under pressure conditions is simulated by molecular dynamics method, microscopic mechanism clarified, and influence on states revealed. The results show that cannot form an effective flow channel low (1 MPa), most water remain channel. molecules a bridge outlet pore break through medium (5 10 MPa). forms stable high (15 With increase pressure, kinetic energy gas increases. But limited system space, diffusion capacity system, miscibility, competitive adsorption effect all trend increasing first, then stabilizing, rapidly last. final recoveries are 33.24%, 75.82%, 64.69%, 83.03% conditions. Among them, miscibility adsorbed layer higher than free 1 MPa condition. And other This study can provide theoretical basis for efficient development oil.

Language: Английский

Citations

0