FIELD: oil and gas industry.
SUBSTANCE: invention relates to methods of preparing hydrocarbon gases. Method for preparation of associated petroleum gas involves low-temperature gas separation due to its successive cooling with prepared gas and third-party coolant with condensation of reflux. Gas is first mixed with stabilisation gas, compressed with cooling of liquid hydrocarbons under dephlegmation conditions due to cooling by third-party coolant to produce a first condensate, then compressed under dephlegmation conditions due to cooling by third-party coolant and low-temperature gas separation to obtain a second condensate, mixed with weathering gas, reduced and separated with production of gas and condensate. Second condensate is reduced and separated with production of weathering gas and weathering condensate. Weathering condensate is mixed with first condensate and heated condensate of low-temperature separation. Obtained mixture is stabilised to obtain a stable condensate and stabilisation gas using low-temperature separation condensate as coolant, as well as external coolant and heat carrier.
EFFECT: higher yield, stable condensate and preparation of associated petroleum gas of low pressure.
1 cl, 1 dwg
