Natural Gas Hydrate Prevention by Using Combination of Two Thermodynamic Hydrate Inhibitors {Meg+Nacl} & {Meg+Kcl}

The gas hydrates cause serious operational and safety problems to oil and gas industry. Hydrates can plug gas pipelines, wellbore and processing units leading to production loss, pipelines rupture and explosion. Many chemicals injected to gas pipeline to decrease hydrate formation temperature and prevent hydrate formation. The most chemicals used are thermodynamic hydrate inhibitors (THIs) like mono-ethylene glycol and methanol. Salt is one of thermodynamic hydrate inhibitors and have the same effect as methanol and MEG. The aim of our work is to perform a simulation study to detect the effect of mixed THIs like (MEG+NaCl) and (MEG+KCl) on gas hydrates at various pressures and temperatures. We studied the hydrate inhibition effect for each inhibitor alone compared the results with the mixed THI. The effect on hydrate formation temperature and the required amount of inhibitor for differentcases were studied. The simulation software used to perform this study was Aspen HYSYS. The data used in our research are collected from a gas field located at north of Egypt. The results show that hydrate inhibition is improved by using combination of two thermodynamic inhibitors.