METHOD FOR PREPARATION OF ASSOCIATED PETROLEUM GAS Russian patent published in 2016 - IPC F25J3/00 

FIELD: gas industry.

SUBSTANCE: invention relates to methods of field processing of hydrocarbon gases and can be used for preparation of associated oil gas in oil and gas industry. Method for preparation of associated oil gas comprises gas compression and cooling of compressed volume, including under dephlegmation conditions and stabilization of phlegm to get compressed gas and condensate. Gas is mixed with separation gas and compressed at least in two stages. Compressed volume of last stage is cooled using as cooling agents of gas of low-temperature separation and the mixture of reduced condensate of low-temperature separation and a portion of the compressed gas of the last stage. Condensate of the last stage is separated with production of separation gas and propane-butane fraction. Part of compressed gas of one of the initial stages is withdrawn as fuel gas for gas-turbine drives, a part of compressed gas of the last stage is mixed with reduced condensate of low-temperature separation and heated at the last stage with production of fuel gas for communal general purposes. Balance part of compressed gas of the last stage is reduced and separated with production of condensate and gas of low-temperature separation, that is heated at the last stage with production of fuel gas for gas piston drives.

EFFECT: technical result is upgraded quality of compressed gas and condensate, as well as enlarging the range of products.

1 cl, 1 dwg