Investigation of the application of gelled polymer systems for permeability modification in petroleum reservoirs
This is the Final Report of an integrated research program to improve the performance and predictability of in situ gelation processes that can be used to improve the volumetric sweep efficiency of waterfloods and other enhanced oil recovery processes. Research was divided into three segments: (I) Physical and Chemical Characterization of Gelled Polymer Systems, (II) In situ Gelation and (III) Correlation and Mathematical Modeling of In situ Gelation. Techniques were developed to study the kinetics of the thiourea/Cr(VI) reduction reaction which is used to control the rate that CR(III) is produced in one of the gelation processes. Gelation of polymers under shear was examined using rheological methods. The effect of shear on the gelation of a Cr(III)/polyacrylamide system was determined. In situ gelation of xanthan/Cr(III) was studied in sandpacks and the mechanisms of in situ gelation were identified from interpretation of pressure profiles and effluent concentration data. Effects of shear rate and permeability of the gelation process were determined. The persistence of permeability reduction resulting from in situ gelation of xanthan/Cr(III) in sandpacks was determined experimentally using gels that exhibited swelling and syneresis in bottle tests. In situ gelation of polyacrylamide/Cr(III) was studied in Berea sandstone core material. A mathematical model of the in situ gelation process for Cr(III)/polyacrylamide was developed. 60 refs., 77 figs., 22 tabs.
- Research Organization:
- Kansas Univ., Lawrence, KS (USA)
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- AC22-85BC10843
- OSTI ID:
- 7203926
- Report Number(s):
- DOE/BC/10843-15; ON: DE90000229
- Country of Publication:
- United States
- Language:
- English
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Gelled polymer systems for permeability modification in petroleum reservoirs
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACRYLAMIDE
GELATION
CHROMIUM COMPLEXES
CHROMIUM COMPOUNDS
COBALT COMPLEXES
KINETICS
POLYMERS
ACID CARBONATES
BRINES
CROSS-LINKING
ENHANCED RECOVERY
MATHEMATICAL MODELS
PETROLEUM
PROGRESS REPORT
REDUCTION
RESERVOIR ROCK
RHEOLOGY
SHEAR
SWEEP EFFICIENCY
THIOUREA
AMIDES
ANTITHYROID DRUGS
CARBONIC ACID DERIVATIVES
CHEMICAL REACTIONS
COMPLEXES
DOCUMENT TYPES
DRUGS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HORMONE ANTAGONISTS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
POLYMERIZATION
RECOVERY
THIOUREAS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
020300* - Petroleum- Drilling & Production
400201 - Chemical & Physicochemical Properties