Compositional Simulator with Non-equilibrium Phase Transitions
- V. R. Zubov (Rock Flow Dynamics) | I. M. Indrupskiy (OGRI RAS) | K. Yu. Bogachev (Rock Flow Dynamics)
- Document ID
- Society of Petroleum Engineers
- SPE Russian Petroleum Technology Conference and Exhibition, 24-26 October, Moscow, Russia
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Petroleum Engineers
- 5.8 Unconventional and Complex Reservoirs, 5.4 Improved and Enhanced Recovery, 5.5.8 History Matching, 5.4.2 Gas Injection Methods, 5.2.1 Phase Behavior and PVT Measurements, 5.8.8 Gas-condensate reservoirs, 5.5 Reservoir Simulation, 5 Reservoir Desciption & Dynamics, 5.2 Fluid Characterization
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The paper presents efficient implementation of the non-equilibrium phase transitions model in compositional simulator. Reservoir non-equilibrium phase behavior effects are examined and simulated with the new approach.
Compositional simulators are widely used for modeling light oil reservoirs, gas injection projects, and gas-condensate reservoirs. Some features for modeling phase transition hysteresis are implemented in black oil simulators, but not in compositional simulators. Though some non-equilibrium phase transition models for compositional simulators were reported in the literature, they were not implemented in industrial simulators because of their complexity. A new physical-based approach is presented in this paper. Modifications for this model are required only to the thermodynamic block of a simulator. All equations and matrix structures for the hydrodynamic (flow) block are not modified.
The new approach is implemented as an extension block in a general purpose reservoir simulator. Implementation of the feature allows to model effects of phase transition hysteresis in compositional simulations. Criterion for determining phase transition type (equilibrium or non-equilibrium) is justified and also implemented.
The application of the new option requires minimum additional input data, which is good for history matching problems. The new approach is tested with numerical cases based on real reservoir data.
|File Size||1 MB||Number of Pages||12|
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