Protection against formation of methanohydrates during gas production

Abstract

It is shown that one of the topical and difficult moments, both in technological and environmental terms, in oil and gas condensate fields, especially in the northern territories, is the fight against hydrate formation. Gas hydrates occur under thermobaric conditions and are the main cause of serious disturbances in the wellbore and pipelines, which reduces the efficiency of energy production. It was revealed that in order to intensify oil and gas production, an inhibitor, toxic methanol, is traditionally used. The mechanism of inhibition of hydrate formation by methanol was studied, and the negative environmental consequences were analyzed. A search was made and a critical analysis was made of modern reagents, as an alternative to methanol, to suppress gas hydrate plugs. A comparative calculation of economic indicators for three variants of inhibitors was carried out: thermal - methanol and monoethylene glycol (MEG), kinetic - SONGID1801-A. t has been shown that a great advantage of kinetic inhibitors is their low dosage, which is a multiple lower than methanol dosages, and environmental safety. Their use will significantly increase the productivity of the well and reduce the environmental risks of the northern territories in the oil and gas production zone.