engleski

Determination of Cost-Effectiveness of the CO2- EOR and CO2 Utilization Factor as Feasibility Indicators for Permanent CO2 Storage

Carbon Capture Utilization and Storage (CCUS) is an effective technology for achieving climate change goals. As part of CCUS, CO2 - enhanced oil recovery results with permanent storage of significant amounts of CO2 and is an attractive technique for oil companies, with the main goal to maximize oil production, and minimize the injected CO2. For this investigation, oil production and retention were observed and compared in 72 reservoir simulation cases with an economic evaluation considering Utilization Factor (UF) and Net Present Value (NPV) which was assessed with different scenarios of CO2 and oil prices (32 scenarios, which, with observed simulation results totals in 1728 cases for economical evaluation). The cases were generated with three different WAG ratios, three permeabilities, two well distances and three depths, each with its specific pressure and temperature conditions. This was set to see the impact of the miscibility on oil production and CO2 sequestration and therefore finding the most optimal case. It was observed that well distances have a significant impact on retention and NPV, being the smaller distance arrange the most favourable for retention in observed period (15 years of CO2-EOR) and considering all aspects, the greatest benefit comes from cases that are at 1545 m with WAG ratio of 1:2 and permeability of 50 mD. Optimum (cost-effective) CO2 EOR cases all result with higher amount of CO2 stored, with 1.8 to 6.7 times CO2 storage capacity increase, compared to the respective cases without CO2-EOR.

CO2EOR ; CCUS ; CO2Retention ; Utilization Factor ; WAG ; EU-ETS

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