Abstract: The adsorption isotherms of alkylbenzene sulfonate on natural core and main minerals that are normally present in reservoir rocks have been investigated. A maximum is observed in the adsorption isotherms, which is not in line with the Langmuir adsorption model. The surfactant loss can be prevented to different degrees by adding sodium silicate in different SiO₂/Na₂O ratio, partially hydrolyzed polyacrylamide. SP type polyelectrolyte or their mixtures of various proportions in the surfactant solution.The results obtained from flow test in which the surfactant solution passed through the artificial and the natural cores are in accord with those above descibed.