Modeling oil displacement in fractured reservoirs using the MRST package

UDK: 622.276.7+004.94

DOI: 10.24887/0028-2448-2025-8-54-58

Key words: hydrodynamic modeling, methods of increasing oil recovery, cracks, oil displacement, software for modeling oil displacement, MATLAB, MRST

Authors: A.V. Tiutiaev1,2 (Gubkin University, RF, Moscow; SamaraNIPIneft LLC, RF, Samara); V.V. Kadet (Gubkin University, RF, Moscow); I.V. Vasilev (Gubkin University, RF, Moscow); A.D. Maximov (Gubkin University, RF, Moscow); A.E. Pavlov (Gubkin University, RF, Moscow); A.S. Dolzhikov (SamaraNIPIneft LLC, RF, Samara)

The article discusses the use of the open source software tool MATLAB Reservoir Simulation Toolbox (MRST) for modeling fracture evolution and fluid filtration in an oil-saturated reservoir. Data structures and computational methods for creating tools for modeling and simulating filtration and geomechanical processes are presented. A phenomenological computational model of the occurrence and development of man-made fractures is proposed, taking into account the dynamics of changes in pressure fields and regional stresses. Hydrodynamic modeling of oil displacement by water in a fractured-porous reservoir with changing fracturing is performed on a two-phase filtration model in a real reservoir system. Calculations were made for various modes of the production-injection well complex for different geological and technological parameters, which enables to determine the optimal production mode. A detailed picture of the dynamics of reservoir flooding and oil displacement is obtained with given parameters of the injection and production wells. Particular attention is paid to modeling the propagation of a fracture in a reservoir and modeling displacement under the condition of fracture propagation taking into account regional stresses and hydraulic resistances. The results confirm the possibility of using MRST for research and educational tasks of studying multiphase filtration of reservoir fluids, modeling the development of fields, including low-permeability reservoirs.

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