Tie-line-based K-value method for compositional simulation

Guillaume Rannou, Denis Voskov, Hamdi A. Tchelepi

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)


The thermodynamic behavior of multicomponent multiphase systems is highly nonlinear, and the coupling to the flow equations is quite complex; as a result, equation-of-state (EOS) -based simulations can be computationally prohibitive. We describe a new Kvalue method that captures the compositional dependence of the phase behavior. Specifically, we propose a method for selecting compositions used in the tabulation of K-values and define an operator that interpolates the K-values as a function of pressure and composition. The method employs the minimal critical pressure (MCP) to detect supercritical compositions, which allows for effective modeling of multicontact miscible displacements. We compare our K-value approach with standard EOS compositional simulation for several isothermal problems, and we demonstrate the efficiency and accuracy of the proposed method.

Original languageEnglish
Pages (from-to)1112-1122
Number of pages11
JournalSPE Journal
Issue number6
Publication statusPublished - 2013
Externally publishedYes


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