The present study approaches the economic and technical evaluation of equivalent carbon dioxide (CO2 eqv.) capture and storage processes, considered in a proposal case compared to a base case. The base case considers an offshore petroleum production facility, with high CO2 content (4 vol%) in the composition of the produced gas and both CO2 and natural gas emissions to the atmosphere, called CO2 eqv. emissions. The results obtained with this study, by using a Hysys process simulator, showed a CO2 emission reduction of 65% comparing the proposal case in relation to the base case.