In general, the fluid system may split into 4 phases: solid, aqueous, oil, and gas. Based on the pressure, temperature and composition of the fluid system, the equation of state calculate the composition, density, enthalpy density, and relative amount of the various phases. Two different equation of state options exist: A table based black oil model, and a method based on the Soave-Redlich-Kwong (SRK) cubic equation of state.
The equation of state input is found between the codeword pair BeqinEOS...EndEOS.