Modeling of surfactant-polymer flooding using a novel FlowER software program

UDK: 622.276.1/.4.001.57 + 622.276.43:678
DOI: 10.24887/0028-2448-2021-7-40-43
Key words: surfactant-polymer flooding, highly viscous oil, high-permeability reservoir, porous reservoir, reservoir simulation modeling
Authors: А.V. Nasybullin (Almetyevsk State Oil Institute, RF, Almetyevsk), М.G. Persova (Novosibirsk State Technical University, RF, Novosibirsk), Е.V. Orekhov (Almetyevsk State Oil Institute, RF, Almetyevsk), А.А. Lutfullin (Tatneft PJSC, RF, Almetyevsk), М.R. Khisametdinov (TatNIPIneft, RF, Bugulma), Е.P. Orlova (TatNIPIneft, RF, Bugulma)

The article presents the results of reservoir simulation modeling of alternative surfactant-polymer composition applications to increase oil recovery in high-permeability porous-type reservoirs containing highly viscous oil. Justification for application of reservoir simulator is provided, peculiar aspects of the applied model compared to commercial software products are revealed, a brief description of the target and associated issues are presented. FlowER software package was used to predict the performance of chemical treatment and select the optimal composition and injection volume for the pilot surfactant-polymer flood project developed in Tatneft. Automatic history matching of the resultant model to actual field data was done in FlowER software package with selection of the main reservoir properties, relative permeability functions. Laboratory studies of the properties of two types of chemical compositions depending on component concentrations were conducted. A series of simulation runs were performed to determine the optimal injectivity of injection wells at different injection volumes with the assumption of bottomhole pressure limitation. Injection of surfactant-polymer system was simulated for various volumes and component concentrations. Dependencies of oil production increment on injection volume were obtained. The paper also presents production vs. injection volume variations, well injectivity changes during injection volume increase as well as after injection of the design volume with variations of formation pore volume. Comparison of two types of compositions at different component concentrations was performed, their efficiency with the increase of surfactant or polymer concentrations was evaluated.


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