processos para a extração e melhora simultânea de uma mistura de hidrocarboneto pesado, e para produzir um produto de hidrocarboneto melhorado, método de otimização da produção de hidrocarbonetos, óleo bruto bombeável, e, uso de co2

The present invention provides a process for simultaneously extracting and upgrading a heavy hydrocarbon mixture, said process comprising: i) injecting supercritical or near-supercritical CO2 at a temperature of around the critical temperature and a pressure of from around the critical pressure into a heavy hydrocarbon deposit; and ii) removing a stream of CO2 from the deposit, which stream is charged with a hydrocarbon mixture having a lower average molecular weight than that of the heavy hydrocarbon deposit, wherein the removed CO2 is optionally recovered and either recycled for subsequent re-injection or injected for long-term sub-surface storage.