Injection of fluids in the subsurface changes the local pore pressure and effective stresses of the target formation. Thermo-elastic and poro-elastic responses of the rock contribute to these changes of stresses. In this study, we show that these changes of effective stress are also heavily influenced by reservoir heterogeneity through numerical simulation. For such purpose, we built a reservoir model of Cranfield which hosts a typical CO2 EOR site in the USA. The model includes vertical heterogeneity in both petrophysical and geomechanical properties estimated from well-logging analysis and laboratory experiments. We performed coupled thermo-poro-elastic reservoir simulation using CMG-GEM simulator.

This content is only available via PDF.
You can access this article if you purchase or spend a download.