METHOD FOR PREPARING HYDROCARBON GAS FOR TRANSPORT BY THE LOW-TEMPERATURE SEPARATION METHOD Russian patent published in 2022 - IPC B01D53/00 F25J3/00 

FIELD: treatment of gases.

SUBSTANCE: present invention relates to a method for preparing hydrocarbon gas for transport by the low-temperature separation method, including supply of a condensate-containing gas flow from low-pressure well clusters to processing trains of the complex gas preparation unit for preliminary and additional separation, compression and consecutive cooling of the gas flow with air and separated gas, primary separation of the gas flow, cooling of the gas flow with the separated gas, secondary separation of the gas flow, secondary consecutive cooling of the gas flow with the separated gas, and by lowering the pressure, final separation of the gas flow, heating of the separated gas by the gas flow, additional cooling of the separated gas by lowering the pressure, secondary heating of the separated gas by the gas flow, removal of the separated gas from the unit, direction of the liquid hydrocarbon and aqueous phases for further preparation. The condensate-containing gas flow with high-melting paraffins from high-pressure well clusters is therein supplied to an additionally mounted gas pre-treatment unit for preliminary and additional separation, followed by dividing the separated liquid phase into degassing gas, condensate with high-melting paraffins, and an aqueous phase, the condensate with high-melting paraffins is heated and output from the unit for transportation for further preparation, the aqueous phase is output from the unit, the degassing gas is introduced into the pre-separated high-pressure gas flow directed to separate processing trains of the complex gas preparation unit, primary separation of the high-pressure gas flow is executed, the high-pressure gas flow is cooled with the separated gas from the high-pressure gas flow, secondary separation of the high-pressure gas flow is executed, the high-pressure gas flow is secondarily consecutively cooled with the separated gas from the high-pressure gas flow, by lowering the pressure, final separation of the high-pressure gas flow is executed, the separated gas is heated with the high-pressure gas flow, the separated gas from the high-pressure gas flow is cooled by lowering the pressure, the separated gas from the high-pressure gas flow is heated by the high-pressure gas flow, the high-pressure separated gas and the separated gas are mixed, the mixture gas is output from the unit, the liquid hydrocarbon and aqueous phases are directed for further preparation.

EFFECT: proposed method ensures joint preparation of condensate-containing formation fluids with various pressure and temperature parameters, as well as those not containing and containing high-melting paraffins.

1 cl, 1 dwg