Carbon Dioxide (CO2) Storage Modelling, Mechanisms, and Effects of Water Injection with sensitivity permeability
Allen Haryanto Lukmana, Nahsya Aprilia Tuhulele, Avianto Kabul Pratiknyo, Ristiyan Ragil Putradianto, Andiko Putro Suryotomo

Department of Petroleum Engineering, Faculty of Mineral Technology, UPN Veteran Yogyakarta, Jl. Ringroad Utara, Condongcatur, Yogyakarta, Indonesia, 55283

Department of Informatics, Faculty of Industrial Engineering, UPN Veteran Yogyakarta, Jl. Babarsari 2, Tambak Bayan, Yogyakarta, Indonesia, 55281

Abstract

Carbon dioxide (CO2) sequestration is essential to address the rising levels of global CO2 emissions, which reached 30.6 gigatons in 2020 (IEA, 2020). Understanding the interplay between structural, residual, solubility, and mineral trapping mechanisms in carbon sequestration, particularly in water injection, is essential for effective climate change mitigation. Investigating these mechanisms under different water injection conditions is crucial for refining carbon sequestration methods. This research analyzes the effect of water injection on CO2 sequestration in high and low permeability reservoirs. By employing the Geochemical EOS Compositional Simulator (GEM), we analyzed the behavior of structural, residual, solubility, and mineral trapping mechanisms under varying water injection conditions. Results indicate that, in both high and low permeability reservoirs, the simultaneous injection of CO2 and water leads to a notable reduction in the amount of CO2 remaining in the supercritical phase, highlighting improved trapping efficiency through enhanced residual and solubility trapping mechanisms. The observed improvements in residual and solubility trapping with water injection indicate that this method can significantly enhance CO2 sequestration efficiency, minimize leakage risks, and bolster long-term storage stability. Our findings suggest that water injection is a promising strategy for enhancing CO2 sequestration and mitigating climate change.

Keywords: CO2 emission, climate change, sequestration, trapping mechanism, water injection

Topic: Engineering