Optimal control of polymer flooding based on maximum principle. (English) Zbl 1252.49032

Summary: Polymer flooding is one of the most important technologies for Enhanced Oil Recovery (EOR). In this paper, an optimal control model of Distributed Parameter Systems (DPSs) for polymer injection strategies is established, which involves the performance index as maximum of the profit, the governing equations as the fluid flow equations of polymer flooding and the inequality constraint as the polymer concentration limitation. To cope with the Optimal Control Problem (OCP) of this DPS, necessary conditions for optimality are obtained through application of the calculus of variations and Pontryagin’s weak maximum principle. A gradient method is proposed for the computation of optimal injection strategies. The numerical results of an example illustrate the effectiveness of the proposed method.


49K20 Optimality conditions for problems involving partial differential equations
49J20 Existence theories for optimal control problems involving partial differential equations
49M30 Other numerical methods in calculus of variations (MSC2010)
90C30 Nonlinear programming
Full Text: DOI


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