Abstract: A laboratory study of cooperative effect on foaming performance of binary surfactant blending system is made in this Paper. Four surfactants with better foaming properties in cooperation with a main foaming agent (SX-1) are picked out from 12 different sorts of surfactants. The foaming performance of those binary blending systems is determined simultaneourly in the presence of inorganic salts. After comprehensive surveying the foamability and foam stability,the best binaty surfactant blending system, SX-1 and SAS,has certain practical significance in the exploitation of oil and gas fields,and in surfactant industry.

Key words: Surfactant, Foamability, Performance tests