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Well Control Optimization Using Smart Proxy Models
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Third EAGE Digitalization Conference and Exhibition, Mar 2023, Volume 2023, p.1 - 5
Abstract
Optimal well controls to maximize the net present value (NPV) are usually obtained by coupling the numerical reservoir simulator with optimization algorithms. This approach requires significant number of simulations that are computationally expensive. Proxy models have a high capability to identify complex dynamic reservoir behavior in short time.
This study proposes a methodology by developing smart proxy models (SPMs) using Artificial Neural Network (ANN) for a synthetic field model to predict field production profiles. The method then integrates the established proxy models with Genetic Algorithm (GA) to solve the well control optimization problem. From SPM-GA coupling, the optimum well control parameters, namely bottom hole pressures of the injectors and producers are investigated to maximize NPV.
The developed SPMs produce outputs within seconds, while the numerical simulator takes an average time of 30 minutes for the case study. SPM-GA coupling works well for well control optimization by finding BHP configuration that gives an increase of over 30% in NPV, and requires fewer simulations compared to the traditional approach. The results show that the established proxy models are robust and efficient tools for mimicking the numerical simulator performance in well control optimization. Significant reduction in computational time and resources is observed.