Effects of polymer concentrations, slug size and permeability stratification in viscous waterfloods

Conference · Thu Jan 01 04:00:00 EST 1970 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5001046

Wang, G C; Caudle, B H

A streamline-type mathematical model has been developed which may be used to study oil recovery by viscous waterfloods for any desired well spacing. The model was used to study the combined effects of permeability stratification, polymer concentration, and viscous water slug size for a 5-spot injection pattern. Five different permeability profiles ranging from a homogeneous to a highly stratified reservoir were studied. It was found that viscous waterfloods show greater percentage increase (over conventional water floods) in oil recovery for stratified reservoirs than for homogeneous reservoirs. A highly stratified reservoir containing viscous oil showed a 96% increases in recovery for a particular viscous waterflood. Also, it was found that the adverse effect of connate water on oil recovery becomes insignificant as the degree of permeability stratification approaches a large number. Guidelines for the determination of an optimum slug size and viscosity were derived. (16 refs.)

• Research Organization: Texas Univ., Austin
• OSTI ID: 5001046
• Report Number(s): CONF-701012-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-2927
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CONNATE WATER
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GROUND WATER
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
MATHEMATICAL MODELS
MINERAL RESOURCES
OIL WELLS
OXYGEN COMPOUNDS
PERMEABILITY
PETROLEUM
PETROLEUM DEPOSITS
POLYMERS
RECOVERY
RESOURCES
STRATIFICATION
VISCOSITY
WATER
WATERFLOODING
WELL SPACING
WELLS