FIELD: oil and gas industry.
SUBSTANCE: invention relates to methods of upgrading plants for preparing natural and associated oil gas for transportation by low-temperature separation and can be used in oil and gas industry. Method of updating an operational installation for low-temperature gas separation comprises installation of cooled gas feed line in a reducing refluxer, above which reflux gas outlet line is connected with a reduction unit, and below by a reflux outlet line to a condensate separation unit. Upper part of refluxer is equipped with two sections of heat-exchange elements, which connect gas and condensate feed lines with low-temperature separation unit, as well as gas and condensate outlet lines with cold recovery unit and condensate separation unit, respectively. Flow of process media between connection points of refluxer on lines for feeding cooled into reduction unit, feeding low-temperature separation gas into cold recovery unit and feeding condensate into condensate separation unit are closed by means of stop valves.
EFFECT: technical result is increased degree of extraction of heavy hydrocarbons while providing predetermined quality of gas preparation.
1 cl, 1 dwg, 1 ex
