Additive composition for oil well cementing formulations

An oil and gas well cementing composition, comprising:

• a) cement;
• b) styrene/butadien copolymer latex in an amount of from about 5% to about 30% by weight of said cement;
• c) from about 0.05% to about 2% by weight of a nonionic surfactant stabilizer additive alkylphenol ethoxylate of the following formula:
• R--C.sub.6 H.sub.5 --[CH.sub.2 --CH.sub.2 --O].sub.n--H
• wherein R is butyl, pentyl, hexyl, heptyl, octyl, nonyl or decyl, said alkylphenol ethoxylate having a molecular weight of from about 1000 to about 3000 such that n equals from about 25 to about 50;
• d) from about 0.01% to about 2% by weight of at least one anionic surfactant stabilizer additive selected from the group consisting of maleic acid/acrylic acid copolymers having the following formula:
• ##STR6## wherein z is an alkali metal or hydrogen, and x and y are numbers such that the molecular weight of said copolymer is from about 4000 to about 200,000;
• e) water in an amount such that the total quantity of water is from about 30% to about 60% by weight of said cement.