METHOD OF HYDROCARBON GAS PREPARATION FOR TRANSPORT Russian patent published in 2020 - IPC B01D19/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, in particular, to treatment of hydrocarbon gas using low-temperature process, and can be used in field preparation of products of gas condensate deposits. Method is characterized in that methanol is introduced into gas stream of hydrocarbon gas from well clusters to inhibit hydration, unstable hydrocarbon condensate stream is heating after weathering with flow of stable condensate, are divided into degassing gas, degassed unstable condensate and water-methanol solution, heating a stream of degassed unstable condensate with a stream of a stable condensate, stabilizing in a rectification column, flow of stable condensate after rectification column is cooled in two steps by unstable condensate flows and discharged from hydrocarbon gas and condensate unit, flow of stabilization gases is cooled by air flow, separated from condensed wide fractions of light hydrocarbons, increasing pressure by compression, cooling with air flow, introducing into gas flow and removing from hydrocarbon gas and condensate preparation plant, stream of wide fractions of light hydrocarbons is removed from apparatus for preparing hydrocarbon gas and condensate, flow of low-concentration mixture of methanol and formation water after three-phase separation of hydrocarbon fluid is introduced into stream of water-methanol solution after three-phase separation of unstable hydrocarbon condensate, heated flow of water-methanol solution with methanol water stream, rectified to methanol and methanol water, methanol stream is cooled with air, condensed, repeatedly introduced into the gas stream as a hydrate inhibitor, removing methanol water after rectification, cooling with a stream of low-concentration solution of formation water and methanol, part of the stream is removed from the gas and condensate treatment plant, pressure of the other portion of the methanol water stream is increased, methanol water is fed into the stream of unstable hydrocarbon condensate, methanol is extracted from the unstable condensate.

EFFECT: reduced consumption of hydrate inhibitor during gas preparation for transportation.

1 cl, 1 dwg