Improved polymers for enhanced oil recovery: synthesis and rheology. First annual report for the period October 1977--September 1978
Synthetic polymers have been carefully prepared as models of known composition and measurable molecular weight, molecular weight distribution, ionic charge density, and branching. Major efforts have been centered on random copolymers of acrylamide with sodium acrylate and on graft copolymers of acrylamide with well characterized polysaccharides such as dextran and amylose. Additionally, random copolymers of poly(acrylamide-co-sodium acrylate) have been prepared by controlled hydrolysis of polyacrylamide homopolymer. The synthesized laboratory samples as well as selected commercial samples have been extensively characterized. Solution rheological studies have been initiated to investigate the interrelationships between solution behavior and hydrodynamic volume. For example, relationships between molecular structure and solution properties under more ideal conditions have been rather rigorously developed in theory. Intrinsic viscosities of synthesized model polymers and representative commercial samples have been obtained utilizing the Huggins equation, Kraemer equation, and Schulz--Blaschke equation. Effects of mixing conditions and aging effects as well as solvent, electrolyte, pH, and temperature dependence on intrinsic viscosity have been measured. Polymer solution degradation studies during the first year have been directed towarddeveloping quantitative assessments of fluid shear stresses and their effects on primary and secondary bond dissociations during flow of polymer containing fluids through porous media. Laboratory evidence seems to indicate that apparent ''shear degradation'' observed for a number of polymers in aqueous solutions is largely a result of secondary bond dissociation rather than primary bond cleavage. This phenomenon is reversible and highly time and concentration dependent. Mobility control loss, during polymer flooding, may be largely due to adsorption, flocculation, and excluded volume effects.
- Research Organization:
- University of Southern Mississippi, Hattiesburg (USA). Dept. of Polymer Science
- DOE Contract Number:
- EF-77-S-05-5603
- OSTI ID:
- 6318455
- Report Number(s):
- BETC-5603-5
- Country of Publication:
- United States
- Language:
- English
Similar Records
Starch-acrylamide graft copolymers for use in enhanced oil recovery. Paper SPE 8422
Responsive copolymers for enhanced petroleum recovery. Second annual report
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
ENHANCED RECOVERY
POLYMERS
RHEOLOGY
SYNTHESIS
AQUEOUS SOLUTIONS
DECOMPOSITION
MICROEMULSION FLOODING
POLYACRYLATES
POLYAMIDES
POLYSACCHARIDES
RESEARCH PROGRAMS
SHEAR PROPERTIES
VISCOSITY
CARBOHYDRATES
CHEMICAL REACTIONS
DISPERSIONS
ESTERS
FLUID INJECTION
MECHANICAL PROPERTIES
MISCIBLE-PHASE DISPLACEMENT
MIXTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYVINYLS
SACCHARIDES
SOLUTIONS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
020300 - Petroleum- Drilling & Production