Thermodynamic Stability Analysis for Multi-Component Mixtures with Capillary Pressure
- Sajjad Sadeghi Neshat (The University of Texas at Austin) | Ryosuke Okuno (The University of Texas at Austin) | Gary Arnold Pope (The University of Texas at Austin)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Simulation Conference, 10-11 April, Galveston, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- 5.1 Reservoir Characterisation, 5.1 Reservoir Characterisation
- Capillary equilibrium, heterogeneity, unconventional, Stability analysis, gas-condensate
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- 182 since 2007
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Despite the great interest and importance of modeling hydrocarbon production from tight oil reservoirs, the thermodynamic stability of multicomponent mixtures with capillary pressure has not been studied sufficiently. This paper introduces a practical algorithm for phase stability analysis of multi-component mixtures with capillary pressure. The capillary pressure is determined from a realistic saturation-dependent function which is representative of pore size distributions as well as other petrophysical properties such as wettability and water saturation in tight oil reservoirs. The new stability procedure is coupled with calculations of the phase behavior. The significance and robustness of the new method is shown in several examples with realistic tight oil and gas-condensate mixtures.
|File Size||1 MB||Number of Pages||19|
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