Thermodynamic description and prediction of the complex multi-phase systems, prone to gas hydrate and salt formation, is crucial to the economical and safe design and operation of oil and gas production and transportation facilities, in particular in offshore and deepwater regions. The topics presented in this book included modelling of the phase behaviour and gas solubility in the water-hydrocarbon systems in the presence of electrolyte solutions with/without hydrate organic inhibitors, as well as development of tools and methods to predict gas hydrate formation and salt precipitation...