METHOD OF TREATING HYDROCARBON GAS BEFORE TRANSPORTATION Russian patent published in 1998 - IPC

FIELD: oil and gas production. SUBSTANCE: method consists in stepwise separation, cooling gas stream between separation steps, introducing hydrate-formation inhibitor, withdrawing liquid phase from separators, separating it into hydrocarbon and aqueous phases, and directing last step-separation aqueous phase into gas stream. According to invention, last step-separation aqueous phase, to which fresh hydrate-formation inhibitor is added, prior to be blown through in the first separation step, is fractioned in contact steps by gas stream in amount ensuring liquid to gas weight ratio from 0.0007 to 0.007. In this case, gas stream, before each contact step, is divided into two streams, one of them being used to fraction aqueous phase and both being combined after each contact step. EFFECT: enhanced process efficiency and decreased number of quality involved. 1 dwg