Publications

Gas hydrates may form in a pipeline transporting gas condensate which contains produced water from an underlying aquifer. To prevent hydrate formation, a hydrate inhibitor - as for example methanol-, is added. At low water production rates, methanol losses to the hydrocarbon phase is significant and must be accounted for in design and economical evaluation. This paper presents a comparison of the methanol dosage needed to inhibit gas hydrates in a gas condensate system which simulated using the Soave-Redlich-Kwong (SRK) equation of state with the Huron and Vidal (HV) non-classical mixing rule and with the Cubic-Plus-Association (CPA) model. The two models have further been tested on phase equilibrium data for a five component mixture. The optimum choice of model is dependent on pressure conditions and water and methanol concentration.