Energies, Journal Year: 2024, Volume and Issue: 17(22), P. 5608 - 5608

Published: Nov. 9, 2024

Under the influence of sedimentation process, phenomenon intraformational non-homogeneity is widely observed in low-permeability reservoirs. In development process water and gas replacement (WAG), transport law distribution residual oil are seriously affected by reservoir properties. this paper, a study on two types reservoirs with certain lengths thicknesses carried out, reasonable method proposed according to characteristics each reservoir. Firstly, through indoor physical simulation experiments combined low-field nuclear magnetic resonance scanning (NMR), investigates injection rate core length double-layer inhomogeneous pore throat mobilization characteristics. Then, two-layer microscopic model designed investigate model’s under rhythmites, gravity, rate, etc. Finally, based results numerical simulation, more for type The show that cores length, WAG can significantly increase pressure effectively seal high-permeability layer Jamin effect improve degree recovery. Moreover, positive reverse rhythm thickness, be reduced properties reservoir, gravity overburden used achieve effective upper layers. therefore improved significantly. These findings provide data support improving effectiveness CO2 emphasize importance multiple factors, such as flow rhythm, replacement.

Language: Английский