CO2 Flooding

1. To what extent, would it remain to be feasible towards improving the oil mobility (achieving desirable fluid flows) solely based on the conventional pressure-driven mechanisms, if the dead end micro- and nano-scale channels remain to be ubiquitous in a real field reservoir @ field-scale?

2. Why does the amount of residual oil that remains trapped in dead-end pores, leading to a relatively lower CO2 sweep efficiency @ field-scale (recovery rate hardly reaching 50 – 60% @ field-scale) remain to differ ‘significantly’ from that observed @ laboratory-scale using experiments (achieving more than 90% recovery using CO2 miscible flooding @ laboratory-scale)?

If so, then, the kind of interaction between crude oil and CO2 @ field-scale and @ laboratory-scale tend to differ significantly?

Whether the way the behavior of the injected CO2 gets influenced by the actual reservoir structure remain to be different significantly from that observed @ laboratory-scale?

Feasible to capture the difference associated with the dynamic miscibility behavior between CO2 and hydrocarbon molecules over the rough and smooth solid-grain surfaces @ laboratory-scale (with different CO2 injection pressures); and feasible to deduce a correlation for ‘rate of decline of CO2 extraction capacity by the actual field-scale reservoir’ as a function of increasing injection pressure?