Fluid Phase Behavior for Conventional and Unconventional Oil and Gas Reservoirs

Chapter Five

Vapor–Liquid Equilibrium (VLE) Calculations

E. Soroush¹, and A. Bahadori^{2,3     1}Sahand University of Technology, Tabriz, Iran     ²Southern Cross University, Lismore, NSW, Australia     ³Australian Oil and Gas Services Pty Ltd, Lismore, NSW, Australia

Abstract

Production and postproduction processes are often associated with the variety of operating conditions that affect the phase envelope of the system, whereas they crucially depend on controlling the present phases. Thus, calculating equilibrium conditions of multicomponent systems seems essential. In this manner, the present chapter begins with a brief introduction to the phase-equilibrium concept followed by flash calculations and most common methods for fining equilibrium coefficient ...