Simulation and analysis of geological Sequestration environment factors change caused by CO2 injection

Sequestration environment factors such as porosity, pressure, permeability will change after supercritical CO₂ injected reservoir aquifer, and that will impact the geological storage capability and stability of sequestration. Based on quartz sand- stone reservoir, by using reactive solute transport simulation software TOUGHREACT, this paper simulated sequestration environment factors change, which was leaded by CO₂ diffusion and CO₂-water-rock chemical reaction after injection of CO₂. The results show that the model can well describe sequestration e environment factors change. Analysis of these Sequestration environment factors change simulation will provide theoretical reference to CO₂ geologic storage project in future.