Acrylamide/acrylic acid copolymers for cement fluid loss control
Acrylamide/acrylic acid copolymers are considered as effective fluid loss control additives in a wide range of oil well cements. Unlike HEC based fluid loss aditives, these copolymers can be used with calcium chloride accelerator without significantly influencing fluid loss control. Another advantage of the copolymers is that the amount of fluid loss for a given concentration of polymer remains relatively constant over a wide range of temperatures. The use of acrylamide/acrylic acid copolymers has generally been restricted to wells below 60 degree C BHCT. Above that temperature chemical changes in the copolymer often lead to retardation of the cement. This paper presents data related to the use of acrylamide/acrylic acid copolymers as fluid loss control agents in oil well cementing. A comparison of these polymers with HEC based fluid loss control additives is made. In addition, data related to the cause of acrylamide/acrylic acid copolymer retarding effects is presented. 4 refs.
- Research Organization:
- B.J. Hughes Inc
- OSTI ID:
- 6413293
- Report Number(s):
- CONF-820169-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Conference: International symposium on oilfield and geothermal chemistry, Dallas, TX, USA, 25 Jan 1982
- Country of Publication:
- United States
- Language:
- English
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