Integration of emissions reduction and gas sweetening in gas-oil separation plant

A gas-oil separation plant (GOSP) system, comprising:

• a crude inlet line extending from a source of an inlet fluid stream;
• a separation vessel fluidly coupled to the crude inlet line and operable to separate a sour gas stream containing hydrogen sulfide (H2S) from the inlet fluid stream;
• an H2S membrane system fluidly coupled to the separation vessel to receive the sour gas stream therefrom, the membrane system operable to separate the H2S from the sour gas stream;
• an electrolyzer fluidly coupled to the membrane system to receive the H2S therefrom;
• the electrolyzer operable to separate hydrogen (H2) from the H2S;
• a combustion gas turbine operable to generate power by burning a fuel and producing an exhaust containing carbon dioxide (CO2);
• a CO2 membrane system operably coupled to the combustion gas turbine to receive the exhaust therefrom and to separate the CO2 from the exhaust;
• and
• a Sabatier reactor fluidly coupled to the electrolyzer for receiving the H2 therefrom and fluidly coupled to the CO2 membrane system for receiving the CO2 therefrom, the Sabatier reactor operable to react the H2 and the CO2 with one another to produce methane (CH4) and water (H2O).