Surfactant can be lost by adsorption on clay. So binary flooding does not have a good synergistic effect. The adsorption properties on montmorillonite of sulfobetaine-type fluorocarbon surfactant (FS) were studied by colorimetry. The adsorption conditions

such as alcohols

polyacrylamides (HPAM) of different molecular weights

pH and temperature were studied. The results showed that addition of 10% volume ratio of different types of alcohol

by adding methanol

ethanol

isopropanol and butanol reduced the adsorption amount on montmorillonite of the FS. Octanol

decanol

ethylene

glycol

glycerol increased the adsorption amount on montmorillonite of the FS. Ethanol reduced the adsorption capacity value of the FS by 67.25%

while octanol increased the adsorption capacity value of the FS by 86.76%.  So low molecular weight alcohols could reduce the adsorption amount of the FS on montmorillonite. HPAM could reduce the adsorption capacity on montmorillonite of the FS. As the HPAM concentration and molecular weight increased

FS adsorption on montmorillonite declined. HPAM with molecular weight of 20 million lowered FS adsorption on montmorillonite more obviously than that with molecular weight of 10 million. With the increase of pH

the adsorption capacity on montmorillonite of the FS decreased. FS adsorption on montmorillonite could be increased in acidic environments

but FS adsorption on montmorillonite could be decreased in alkaline environments. As temperature increased

the adsorption capacity on montmorillonite of the FS first increased and then decreased

with the maximum adsorption capacity at 40—50℃. X-ray diffraction (XRD) of montmorillonite treated with the FS indicated that the FS entered the clay

and increased the layer spacing of MMT.