Numerical Simulation of CO2 Geological Storage in Luojiazhai Gas Reservoir
A three-dimensional geological model was established based on the Jialingjiang formation in Luojiazhai,and FLAC3D-TOUGHREACT was used to simulate and evaluate the formation pressure,reservoir physical properties and CO2 migration law after CO2 injection into the formation.The results showed that during the 10 years of CO2 injection,the injection of CO2 increased the whole formation pressure,and the high-pressure field showed a gradient decrease centered on the injection well and expanded around.The porosity and permeability of the reservoir gradually increased with the injection of CO2,while the physical properties of the cap rock did not change significantly.The CO2 plume mainly migrated in the intermediate reservoir and did not break through the cap rocks.The simulation study showed that the total CO2 storage capacity of Jialingjiang formation was 3.211×107 kg.Results indicated that the selected layers of the Jialingjiang Formation can effectively store CO2.
carbon dioxide storagedepleted gas reservoirsnumerical simulationJialingjiang formation
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