Journal de géologie et géophysique
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Abstrait

Numerical Simulation of Water Alternating Gas Injections (WAG) into Hydrocarbon Reservoirs: Factors Influencing Oil Recovery

Galkin Alexander, Al-Obaidi Sudad*, Smirnov Viktor

As oil production rates decline in the hydrocarbon fields and energy consumption increases, Enhanced Oil Recovery (EOR) methods are being used to recover the remaining oil after primary and secondary oil recovery methods, such as water flooding and gas injection, have been applied. Moreover, no field development project would be complete without numerical modelling of reservoir processes. In this study, factors affecting oil recovery are examined when simulating the alternate injection of water and gas WAG into a hydrocarbon reservoir. The simulation reveals that oil recovery increases with the horizontal permeability, but at permeability over 50 md, the effect of water alternating gas injection becomes insignificant. Additionally, a water-to-gas ratio WAG of 1:1 is the optimal injection value that yields maximum oil recovery.