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Well Placement Optimization Based on Pressure Gradient Distribution; Applicable to CO2 Sequestration
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 1st Geoscience & Engineering in Energy Transition Conference, Nov 2020, Volume 2020, p.1 - 5
Abstract
In well location optimization, the appropriate selection of initial guess for the optimization algorithms can reduce the required number of simulation runs. In this research, the idea of well location optimization based on pressure gradient distribution in the reservoir for CO2 injection is presented. Targets are those with low absolute pressure gradients leading to the areas minimally influenced by the existing injection wells.
The pressure profile of a steady-state case is applied to define the objective function based on the pressure gradient and superposition principle. The numerical active set method is implemented for the optimization algorithm as it can include the effect of multiple wells and linear boundaries. In a simple reservoir of fixed properties, this corresponds to the optimum well location for injection or production, whereas in a reservoir with variable properties, the result is an initial guess for the optimization process. The optimization algorithm is addressed for two scenarios including two and four CO2 injection wells.