Accurate prediction of phase equilibria regarding CH4 replacement in hydrate phase with high pressure CO2 is an important issue in modern reservoir engineering. In this work we investigate the possibility of establishing a thermodynamic framework for predicting the hydrate equilibrium conditions for evaluation of CO2 injection scenarios. Different combinations of equations of state and mixing rules are applied and the most accurate thermodynamic models at different CO2 concentration ranges are proposed.
Gunn DA, Nelder LM, Rochelle CA, Bateman K, Jackson PD, Lovell MA, Hobbs PRN, Long D, Rees JG, Schultheiss P, Roberts J, Francis T, Terra Nova., 14, 43, 2002