Feasibility of CO₂ geological storage in the Xingou oil field, Jianghan Basin, China

Geological storage of CO₂ as an effective way of reducing CO₂ output to the atmosphere receives growing attention worldwide. To evaluate the feasibility of this technique in the Xingou oil field of Jianghan Basin in China, 2D and 3D models of CO₂ geological storage were established using TOUGH2 software. Results showed that CO₂ gas can be stored in the deepest reservoir through continuous injection over 50 years, and will remain effectively confined within the space under the second cap-rock during its diffusion over 500 years. Compared with 2D models, 3D models showed that the diffusion process of CO₂ gas in the reservoir will create a mushroom-shaped zone of influence. (authors)