Second generation copolymers for EOR

Conference · Sun May 01 00:00:00 EDT 1988 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:6638240

McCormick, C L

In this report, the authors review four types of acrylamide-based copolymers with distinctly different dilute solutions and rheological behavior. Each of these ''second generation'' systems possesses characteristics which, in theory, should be superior to conventional polymers under certain operational conditions. Type I copolymers are prepared from acrylamide (AM) and sodium-3-acrylamido-3-methylbutanoate (NaAMB). The high molecular weight, viscosity maintenance, and phase stability in the presence of divalent ions make these copolymers especially attractive for mobility control in EOR. Type II copolymers address the problems of entrapment, pore clogging, and shear degradation often encountered with ultrahigh molecular weight copolymers. The copolymers of this type are lower molecular weight than Type 1 but associate in a cooperative manner in semi-dilute solutions to enhance solution viscoscity. In this report, the authors discuss associative polymers of acrylamide/N-alkyl acrylamides which contain low mole percentages of C/sub 8/, C/sub 10/, or C/sub 12/ comonomers. In practice, a third charged comonomer such as carboxylated or sulfonated one, might be necessary to reduce adsorption to reservoir rock. Type III systems are relatively low molecular weight and hyrophibically modified in order to bring about intramolecular micelle-like association in aqueous solution. The aqueous solutions are non-viscous; viscosification occurs upon solubilization of hydrocarbons in the hydrophobic domains. Copolymers of acrylamide with N-propyl diacetone acrylamide are examples of Type III.

• Research Organization: Dept. of Polymer Science, Univ. of Southern Mississippi, Southern Station Box 10076, Hattlesburg, MS (US)
• OSTI ID: 6638240
• Report Number(s): CONF-880659-
• Journal Information: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 33:1; Conference: ACS symposium on advances in oil field chemistry, Toronto, Canada, 5 Jun 1988
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COPOLYMERS
CHEMICAL PROPERTIES
OIL WELLS
ENHANCED RECOVERY
ACRYLAMIDE
ACRYLATES
AQUEOUS SOLUTIONS
INJECTION WELLS
MOLECULAR WEIGHT
SYNTHESIS
TECHNOLOGY ASSESSMENT
VISCOSITY
AMIDES
CARBOXYLIC ACID SALTS
DISPERSIONS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
RECOVERY
SOLUTIONS
WELLS
020300* - Petroleum- Drilling & Production
400201 - Chemical & Physicochemical Properties