Patent ID: 7654320

Claim:
A system for processing a produced gas mixture of hydrocarbon and carbon dioxide gas produced from one or more hydrocarbon reservoirs and re-injection of at least a portion of the carbon dioxide component into at least one oil reservoir for the purposes of enhanced oil recovery from the at least one oil reservoir, said system comprising: a gas power turbine, said gas turbine having a burner adapted to burn the produced gas mixture of hydrocarbon gas and carbon dioxide as a fuel gas with substantially pure oxygen as an oxidizing agent, said fuel gas having a heating value of less than 500 Btu/scf; a capture system for capturing exhaust gas from the gas power turbine, said exhaust gas including a carbon dioxide component from the original produced gas mixture used as the fuel gas and a second carbon dioxide component formed as a product of the oxidation of the oxygen and a hydrocarbon component of the fuel gas; an inlet compressor, said inlet compressor receiving at least a portion of the exhaust gas from the capture system as a working fluid and compressing the captured exhaust gas, wherein at least a portion of the compressed captured exhaust gas from the inlet compressor is supplied to the burner of the gas power turbine and at least a portion of the compressed captured exhaust gas is for injection into the at least one oil reservoir; and a heat exchanger adapted to receive heat from the captured exhaust gas and transfer it to a stream of high-pressure power gas, wherein said stream of high-pressure power gas is then sent to a turbo expander engine used to drive an electric generator.