Mechanical Properties of Sandstones Damaged by CO 2 Reactions and Flow Characteristics under Complex Mixed-Wettability

The acid production reaction between CO 2 and water in rocks changes the pore structure, thereby altering the rock mechanical properties. To ensure the safety of CO 2 storage, it is critical to identify the rock damage mechanisms, clarify the variation patterns of mechanical properties under damage conditions, and investigate the flow characteristics of two-phase CO 2 -water systems under complex mixed-wettability. This study established a constant-temperature and -pressure multiphase CO 2 -rock immersion experimental system. Additionally, a comprehensive experimental procedure integrating CO 2 immersion, CT imaging, and uniaxial compression was designed. A comparative study revealed that reactions involving…

• NN
  National Natural Science Foundation of China

  Award: 52304029
• NS
  Natural Science Foundation of Liaoning Province

  Award: 2025-MS-137
• SK
  State Key Laboratory of Geomechanics and Geotechnical Engineering

  Award: SKLGME023022
• LR
  Liaoning Revitalization Talents Program

  Award: XLYC2403059