Application of smart proxy model for multi-optimization of CO2-EOR design in farnsworth unit with production-injection well conversion
Yoonsu Na, Youngsoo Song, William Ampomah, Jihoon Wang
Abstract
CO 2 -Enhanced Oil Recovery (CO 2 -EOR) is an effective development strategy and an economically viable CO 2 storage method for a mature oil field. In this study, a smart proxy model (SPM) was constructed to establish the optimal development strategies in Farnsworth Unit (FWU) considering CO 2 storage and oil production with the production-injection well conversion. An SPM was constructed with the results of 16 reservoir simulations and was validated with an R 2 values of 96.3 % and 97.5 % for the CO 2 storage and oil production, respectively. The obtained Pareto front indicates a range of the optimized CO 2 storage and oil production. In addition, the maximum CO 2 storage case shows 260 % and 61.1 % of the CO 2 storage and oil production of the base case, respectively. When the maximum oil production is targeted, the CO 2 storage and oil production are respectively 66.5 % and 111.3 % of the base case. It was concluded that the SPM is effectively applicable for multi-objective optimization with fewer simulation runs and shorter time. In addition, the well conversion is a viable method to improve both the CO 2 storage and oil production in the FWU during CO 2 -EOR process.