Abstract
The article discusses practical issues of modeling the reverse dissolution of gas released from oil, taking into account the nonequilibrium phase transition. An approximate method has been developed for taking into account the nonequilibrium gas dissolution process based on standard reservoir flow simulators without the corresponding option. The developed methodology was tested on the example of pressure build up (PBU) taken on a real field. The possibility of determining the characteristic relaxation time from the PBU is demonstrated in the framework of relaxation models for nonequilibrium phase transitions. The effect of nonequilibrium phase transitions on the dynamics of pressure recovery is determined. Well testing design is proposed that makes it possible to detect nonequilibrium gas dissolution and determine the necessary parameters for its consideration in flow simulations.
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