Abstract:A series of foam systems, which was mainly composed of the mixture of amino sulfonate amphoteric surfactants with 12 carbon atoms (AS12) and 14 carbon atoms (AS14) in the mass ratio of 3:1, were developed. FJ-1, FJ-2, FJ-4, FJ-6 and FJ-8 were obtained in the increasing mass content of AS12 and AS14 in the mixtures. Thereinto, FJ-4, FJ-6 and FJ-8, compatible with the aqueous solution with mineralization degree of 120.67 g/L, were screened out from a series of foam systems. The critical micelle concentrations (abbr. ccmc) of them in aqueous solution were determined by the method of surface tension, and the properties of salt-tolerance and temperature resistance of them in aqueous solution under the concentrations of ccmc were evaluated by determining the half-life of bubble, on behalf of foaming stability. The results showed that at the temperature of 25℃, the foaming stability of FJ-6 or FJ-8 reduced in aqueous NaCl solution as the dosage of NaCl increased (less than 120 g/L) and linearly increased in queous CaCl2 solution with the increase of the content of CaCl2 (<14 g/L), and did not strikingly weakened in aqueous solution of mixed salt of 120.67 g/L due to the effect of the divalent counterion Ca2+ or Mg2+. With the increase of temperature (lower than 80℃), the gentle drop of the foaming stability in aqueous solution containing the mixed salt of 120.67g/L, contrasting to the rapid drop in aqueous solution without salt, showed the excellent temperature resistance of FJ-6 or FJ-8.