Injecting dissolved carbon dioxide into a subterranean formation
A method of sequestering carbon uses a mixed component gas that includes carbon dioxide, dissolves the carbon dioxide in a liquid under pressure, and pumps the resulting carbonated liquid into a subterranean formation.
1. A method of sequestering carbon in a target zone of a subterranean formation, the method comprising:
compressing a mixed component gas comprising a carbon dioxide gas and at least a second gas;
mixing the compressed mixed component gas with pressurized liquid;
dissolving at least a portion of the carbon dioxide gas into the pressurized liquid, creating a carbonated liquid;
separating at least some of the second gas from the carbonated liquid, the separated second gas at a pressure above atmospheric pressure;
flowing the separated second gas to a pressure recovery system;
using the separated second gas to pressurize a mixed component gas for mixing with pressurized water; and
injecting the carbonated liquid into a subterranean target zone.
2. The method of claim 1 , wherein the mixture of pressurized liquid and mixed component gas are at a pressure selected to dissolve carbon dioxide in the water.
3. The method of claim 1 , wherein the at least one second gas of the mixed component gas comprises at least one of nitrogen, oxygen and hydrogen.
4. The method of claim 1 , wherein the pressure recovery system comprises a turbocharger or a pressure exchanger.
5. The method of claim 1 , further comprising: pressurizing the carbonated liquid prior to injecting the carbonated liquid into the subterranean target zone.
6. The method of claim 1 , wherein mixing the mixed component gas with pressurized liquid further comprises mixing the mixed component gas with a water-based fluid.
7. The method of claim 1 , wherein mixing the mixed component gas with pressurized liquid further comprises mixing the mixed component gas waste water from a hydrocarbon well.
8. The method of claim 1 , wherein compressing a mixed component gas comprising a carbon dioxide gas and at least a second gas, further comprises compressing carbon dioxide waste from an industrial source.