«Proceedings of Gubkin University»

MULTICRITERIA EVALUATION OF EFFECTIVENESS OF CYCLIC STEAM TREATMENT OF HIGH-VISCOSITY OIL RESERVOIR

UDC: 622.2
DOI: 10.33285/2073-9028-2021-2(303)-14-26

Authors:

¹ Gubkin Russian State University of Oil and Gas (National Research University), Moscow, Russian Federation

Keywords: high-viscosity oil, 3D hydrodynamic modeling, enhanced oil recovery methods, thermal steam treatment, steam-oil ratio

Annotation:

Energy efficiency is a specific additional criterion of evaluating the effectiveness of thermal methods for EOR, the steam-oil ratio (SOR) being traditionally the main criterion. The presence of an additional criterion significantly complicates the task of finding a rational option for cyclic steam injection. It was shown that the degree of reservoir heterogeneity significantly influences the technical and economic efficiency of the “Huff and Puff” technology. The problem was solved using the CMG STARS software package. A 3D hydrodynamic model of the symmetry element was built for a wide range of reservoir heterogeneity in terms of permeability and geological structure of the reservoir; the processes of thermal steam injection were calculated; the economic efficiency of thermal steam stimulation of the formation was assessed. It was shown that the use of a technological parameter - steam-oil ratio for optimization of steam-thermal treatment of wells - may not provide the maximum economic effect.

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