TY  - EJOU
AU  - Zhao, Yulong 
AU  - Luo, Yang 
AU  - Luo, Yuming 
AU  - Pang, Yulai 
AU  - Zhang, Ruihan 
AU  - Zhao, Zihan 

TI  - Numerical Simulation of Microscopic Seepage Mechanisms in Gas Reservoir Storage Systems
T2  - Fluid Dynamics \& Materials Processing

PY  - 2025
VL  - 21
IS  - 12
SN  - 1555-2578

AB  - The development of underground gas storage (UGS) systems is vital for maintaining stability between energy supply and demand. This study explores the dynamic response mechanisms of carbonate reservoirs subjected to intense injection–production cycling during UGS operations. By integrating three-dimensional digital core technology with a coupled poro-mechanical model, we simulate the pore-scale behavior of a representative Huangcaoxia UGS carbonate core. The results demonstrate that fluid–solid coupling effects markedly amplify permeability reduction, far exceeding the influence of porosity variations alone. More significantly, gas production leads to a pronounced decline in permeability driven by rising effective stress, arising from localized stress concentration at pore throats and reorganization of the internal flow field. The provided insights are intended as a theoretical basis for refining operational strategies and enhancing the long-term performance and reliability of underground gas storage facilities.
KW  - Gas reservoir-type storage; digital core; fluid-solid coupling; seepage parameters; matrix deformation

DO  - 10.32604/fdmp.2025.070685