Method and system for preventing hydrate formation by reinjecting hydrocarbon gas including methanol

摘要

The invention relates to a method of preventing hydrate formation by reinjecting hydrocarbon gas from an oil production in a production well. Part of the hydrocarbon gas stream from the oil production is reacted to produce raw methanol. This is subsequently added to the remaining hydrocarbon gas which is reinjected in the same production well or injected in another production well. The invention also relates to the use of a slip stream from a hydrocarbon gas stream separated from oil in the production of oil in a production well for the synthesis of methanol to be added to the remaining hydrocarbon gas stream to prevent the formation of hydrocarbon gas hydrates when said hydrocarbon gas stream is reinjected in oil production wells.