Starch-acrylamide graft copolymers for use in enhanced oil recovery

Conference · Mon Jan 01 04:00:00 EST 1979 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5850119

Butler, G B; Hogen-Esch, T E; Meister, J J; Pledger, H Jr

Starch-acrylamide, graft copolymers are effective but shear-sensitive viscosifiers which, when synthesized with 18 or less grafts per starch molecule, duplicate the rheology of acrylamide homopolymer of 1 to 3 times higher molecular weight. Solutions of copolymer must be prepared at shear rates below 100 sec/sup -1/ and lose up to 40% of their viscosity when filtered through 0.45-micron pores. Copolymers with 18 or less grafts per starch molecule have higher intrinsic viscosities, higher solution viscosities, and higher solution screen factors than equal molecular weight homopolymers and all 3 properties of the copolymer increase with increasing molecular weight or decreasing number of grafts. The viscosity of copolymer solutions drops by less than 3% when sodium chloride concentration varies from 0 to 10,000 ppM or calcium ion concentration varies from 0 to 10,000 ppM. 25 references.

• OSTI ID: 5850119
• Report Number(s): CONF-790913-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-8422
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACRYLAMIDE
ALKALI METAL COMPOUNDS
AMIDES
CALCIUM IONS
CARBOHYDRATES
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHLORIDES
CHLORINE COMPOUNDS
COPOLYMERS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
GRAFTS
HALIDES
HALOGEN COMPOUNDS
IONS
MECHANICAL PROPERTIES
MOLECULAR WEIGHT
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
PETROLEUM
POLYMERS
POLYSACCHARIDES
REAGENTS
RECOVERY
RHEOLOGY
SACCHARIDES
SHEAR PROPERTIES
SODIUM CHLORIDES
SODIUM COMPOUNDS
STARCH
TRANSPLANTS
USES
VISCOSITY
WATERFLOODING
WELLS