Method of using overbased sulfonate water flood additive derived from heavy coker gas oil

Patent · Tue Apr 16 04:00:00 EDT 1974

OSTI ID:7299639

Krehbiel, D D; Gregory, M D; Clark, C R; Kennedy, C D

An anionic waterflood additive for enhanced oil recovery was developed by forming sulfonic acids of heavy coker gas oil, which were then neutralized and overbased to about 4 percent excess base. Oil recovery using the anionic additive was much greater than for nonionic and cationic compositions. The overbased composition may be produced in situ by first injecting the sulfonate followed by the base. Additional oil can be recovered by injecting an effective amount of a slug of base into the formation after the overbased slug has been injected. Berea cores were saturated with 5 percent by weight sodium chloride brine, flooded with 80 Pale oil, and waterflooded with the brine. An aqueous slug of the overbased sulfonates recovered about 10 percent PV of residual oil.

• Assignee: Continental Oil Co.
• Patent Number(s): US 3804170
• OSTI ID: 7299639
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
ALKALI METAL COMPOUNDS
BRINES
CHLORIDES
CHLORINE COMPOUNDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
GAS OILS
HALIDES
HALOGEN COMPOUNDS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SULFONIC ACIDS
WATERFLOODING
WELLS