Abstract
Effective geological carbon sequestration depends on a thorough understanding of the thermomechanical behavior of CO2 and water in subsurface environments. This study introduces a two-temperature thermoporoelastic model that effectively captures the temperature gradient between the solid matrix and pore fluid, which is critical to addressing key challenges in CO2 storage monitoring. By combining previous experimental measurements with numerical simulations, we investigate how temperature-dependent fluid properties, fluid type, and saturation influence seismic wave propagation in sandstone. The results reveal pronounced variations in seismic velocity and attenuation between water- and CO2-saturated conditions, highlighting the significant role of fluid properties in reservoir behavior and seismic response. Importantly, model predictions agree well with available experimental data, demonstrating its potential for enhancing the accuracy of real-time CO2 storage monitoring.
Paper information:
Hou, W., Fu, L. Y., Carcione, J. M., Gurevich, B. (2025). Two-temperature thermoporoelastic modeling of sandstone reservoirs for monitoring CO2 sequestration. Geophysics, 91(1), 1-49. https://doi.org/10.1190/geo2025-0034.1
