CO2 CAPTURE FOR THERMAL IN SITU HYDROCARBON RECOVERY OPERATIONS

摘要

Capturing CO2 from a CO2-containing gas generated from steam production in a thermal in situ hydrocarbon recovery operation, such as SAGD or CSS, can include the following: supplying the CO2-containing gas to an absorber to enable contact of the gas with an absorption solution, to produce a CO2-depleted gas and a CO2-loaded solution; supplying the CO2-loaded solution to a desorber to promote release of CO2 from the CO2-loaded solution, to produce a CO2 gas stream and a regenerated solution; and heating the absorber and/or the desorber with heat at least partly recovered from the thermal in situ hydrocarbon recovery operation. The CO2 capture operation can be enhanced by carbonic anhydrase or an analog thereof.