Patent ID: 7861782

Claim:
A method of cementing comprising: introducing a foamed cement composition into a well bore, wherein the foamed cement composition comprises cement, a surfactant composition, gas, and water, wherein the surfactant composition comprises: an ethoxylated alcohol ether sulfate of the formula H(CH 2 ) a (OC 2 H 4 ) b OSO 3 NH 4 + wherein a is an integer in the range of about 6 to about 10 and b is an integer in the range of about 3 to about 10, the ethoxylated alcohol ether present in the surfactant composition in an amount in the range of about 60 to about 64 parts by weight, a first alkyl or alkene amidopropyl betaine of the formula Râ€”CONHCH 2 CH 2 CH 2 N + (CH 3 ) 2 CH 2 CO 2 âˆ’ wherein R is a radical selected from the group consisting of decyl, cocoyl, lauryl, cetyl, and oleyl, the first alkyl or alkene amidopropyl betaine present in the surfactant composition in an amount in the range of about 30 to about 33 parts by weight, and a second alkyl or alkene amidopropyl betaine of the formula Râ€”CONHCH 2 CH 2 CH 2 N + (CH 3 ) 2 CH 2 CO 2 âˆ’ wherein R is a C 8 -C 18 radical, the second alkyl or alkene amidopropyl betaine present in the surfactant composition in an amount in the range of about 1 to about 5 parts by weight; and allowing the foamed cement composition to set.