Investigation of gravity influence on EOR and CO2 geological storage based on pore-scale simulation

• DOI: 10.1016/j.petsci.2023.11.026
• Publication Date: 2023-12-07T01:28:07Z
• Authors: Yong-Mao Hao; Gui-Cheng Wu; Zong-Fa Li; Zhong-Hui Wu; Yong-Quan Sun; Ran Liu; Xing-Xing Li; Bo-Xin Pang; Nan Li
• Keywords: Component (thermodynamics); Reservoir Simulation

Gravity assistance is a critical factor influencing CO2–oil mixing and miscible flow during EOR CO2 geological storage. Based on the Navier–Stokes equation, component mass conservation fluid property–composition relationship, mathematical model for pore-scale injection in oil-saturated porous media was developed this study. The can reflect effects of gravity assistance, diffusion, density variation, velocity change For non-homogeneous media, influence large difference help to minimize between main path surrounding area, thus improving oil recovery Large angles oil–CO2 differences increase by 22.6% 4.2%, respectively, storage 37.9% 4.7%, respectively. Component diffusion facilitates transportation components from low-velocity region path, thereby reducing oil/CO2 concentration within media. 5.7% 6.9%, In addition, combined with low rate creates more uniform spatial distribution component, resulting increases 9.5% 15.7% storage, This study provides theoretical support processes.