| 摘要 |
The hydrogen sulphide content of natural gas obtained from the extraction of sour-gas containing crude oil/ natural gas mixtures, is reduced by reducing the high pressure of a raw crude oil/ natural gas mixture to 70-130 bar, separating an outgassing raw gas from the crude oil, cooling the outgassed raw gas and simultaneously drawing off a liquid medium which condenses from the outgassing raw gas during cooling. The outgassed raw gas is subjected, after pressure reduction, to gas scrubbing by a physically active solvent. The laden solvent is directed to at least one pressure reduction step to obtain H2S outgas from the solvent. The pressure of the crude oil is further reduced in two subsequent steps to 20-40 bar and 2-15 bar and additional H2S rich raw gas streams are separated from the crude oil which outgas therefrom. The H2S containing gas outgassed from the solvent is brought to the same pressure as the H2S rich raw gases outgassed from the crude oil and all outgassed H2S containing streams are combined and brought to a pressure above that of the crude oil reservoir and fed into a well in the reservoir. |
