Comparison of EoS-Based and K-Values-Based Methods for Three-Phase Thermal Simulation

Zaydullin, Rustem; Voskov, D.V.; Tchelepi, Hamdi A.

Comparison of EoS-Based and K-Values-Based Methods for Three-Phase Thermal Simulation

Journal article (2016)

Authors

Rustem Zaydullin Stanford University, TOTAL EandP RandT USA

D.V. Voskov Reservoir Engineering - , Stanford University

Hamdi A. Tchelepi Stanford University

Research Group

Reservoir Engineering () (TU Delft)

Compositional simulation Equation of State K-values method Thermal simulation

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Published Date

2016

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Reservoir Engineering

Abstract

This paper presents a detailed numerical analysis of two methods for phase-behavior computations associated with thermal compositional reservoir simulation. Specifically, we analyze and compare the standard K-values approach with an Equation of State (EoS) model. We study steam and steam–solvent injection into a one-dimensional reservoir saturated with heavy oil in order to identify the impact of using different methods to describe the phase behavior. We then present results for complex displacement processes in multidimensional reservoir models. The investigation shows the differences in the predictions between K-values- and EoS-based simulations can vary from small to quite significant depending on the compositional interactions between the injected and resident fluids in the modeled displacement process.