SPE Journal
Volume 17,
Number 4,
December 2012,
pp. 1096-1107
Summary
Efficient and robust phase equilibrium computation has become a prerequisite
for successful large-scale compositional reservoir simulation. When knowledge
of the number of phases is not available, the ideal strategy for phase-split
calculation is the use of stability testing. Stability testing not only
establishes whether a given state is stable, but also provides good initial
guess for phase-split calculation. In this research, we present a general
strategy for two- and three-phase split calculations based on reliable
stability testing. Our strategy includes the introduction of systematic
initialization of stability testing particularly for liquid/liquid and
vapor/liquid/liquid equilibria. Powerful features of the strategy are
extensively tested by examples including calculation of complicated phase
envelopes of hydrocarbon fluids mixed with CO2 in single-, two-, and
three-phase regions.
© 2012. Society of Petroleum Engineers
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History
- Original manuscript received:
9 August 2010
- Meeting paper published:
24 April 2010
- Revised manuscript received:
26 January 2012
- Manuscript approved:
3 February 2012
- Published online:
28 November 2012
- Version of record:
6 December 2012
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