Studies on CO2 foam stability and the influence of polymer on CO2 foam properties

摘要

The stability of CO2 foam stabilised by sodium dodecyl benzene sulfonate (SDBS) has been studied compared with N-2 foam and the influences of polymer additives on foamability and stability of CO2 foam have been investigated with partially hydrolysed polyacrylamide (HPAM) by different foaming methods. The crude oil and tetradecane were used for the oil tolerance tests. Static foam measurements showed that the stability of CO2 foam was much lower than that of N2 foam both in the presence and absence of oil. The addition of HPAM reduced the foamability dramatically, because of the increased viscosity of the foaming solution. The stability of CO2 foam was improved with 0.01 wt.% HPAM additive and the CO2 foam performed worse even less stable than the parallel samples without HPAM when the amount of HPAM increased to 0.05 wt.%. The addition of HPAM improved the stability of the CO2 foam/oil system in some degree.