AFM CCUS CCUS-EOR CO2 flooding CO2 front CO2 geological storage CO2 injectivity CO2-EOR H2O content Lunnan oilfield PSO Random Forest Sherwood correlation XGBoost regression carbon dioxide flooding carbon dioxide sequestration carbonic anhydrase confined fluids contact angle continental reservoir corrosion corrosion product film depleted oil and gas reservoirs dissolution dissolution trapping gas injection expansion impurity injectivity main controlling factor mechanism of mineralization