Dependence of pressure drop on surfactant solution flow rate in foam coreflooding experiments through 50 mD limestone

The pressure drop (dP) and apparent viscosity characterize the ability of foam to control gas mobility in core flooding experiments. There is no clarity regarding which factor, total flow rate (qt), foam quality (fg), gas (qg) or liquid (ql) flow rate, determines the dP. The inconsistency in interpretation can be caused by the differences in conditions of experiments, which are carried out at one fixed and other varying parameter.