A mixed-integer non-linear problem formulation for miscible WAG injection

The entire optimization study is conducted in a semi-automated manner. A proprietary program runs and manages the integration of the reservoir simulator, the NPV model and the optimizer. This is done automatically for each investigated strategy. The proposed methodology is applicable to any oil reservoir where both surface water and gas injection is available. This work contributes to the literature by establishing a general mixed-integer problem formulation for water and gas injection and providing an efficient heuristic method for solving the problem.