METHOD FOR GASEOUS HYDROCARBON PREPARATION FOR TRANSPORTATION

FIELD: oil and gas industries, particularly gaseous hydrocarbon treatment with the use of low-temperature operation for preconditioning of product extracted from gas-condensate field. ^ SUBSTANCE: method involves supplying formation gas into the first stage separator; supplying gas separated at the first stage into the second stage separator through heat-exchanger of the first cooling stage; delivering gas separated at the second stage in the third stage separator through heat-exchanger of the second cooling stage and expansion means, for instance through throttle or ejector; passing gas separated at the third stage sequentially through heat-exchangers of the second and the first cooling stages and discharging liquid from separators into segregators. Instable condensate is alternately supplied from segregators in two accumulation vessels. High pressure gas exiting the primary separator is alternately fed to the accumulation vessels to transport instable condensate from above vessels. ^ EFFECT: provision of no-pump used instable condensate supply for condensate treatment with the use of pressure of gas flow after the primary separation thereof. ^ 1 dwg