FIELD: gas industry. SUBSTANCE: invention consists in absorption purification of original gas from carbon dioxide and hydrogen sulfide, its drying, and oil absorption of heavy hydrocarbons. Commercial gas is forwarded to consumers, while heavy hydrocarbon fraction is fractioned to return C1-C3-hydrocarbons into purification stage. According to invention, original gas is preliminarily separated under pressure 53-56 atm, oil absorption is carried out under pressure 53-56 atm, heavy hydrocarbon fraction is returned into oil-absorption stage, and C3-C4-hydrocarbon fraction is withdrawn as commercial product. EFFECT: improved efficiency of original gas utilization. 1 dwg
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