Method of using overbased crude oil as waterflood additive

Patent · Tue Dec 09 04:00:00 EST 1975

OSTI ID:7348446

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

An improved anionic waterflood additive is prepared by sulfonating a crude oil having an API gravity of at least 25 and an aromatic hydrocarbon content of at least 15 percent by weight; neutralizing the sulfonated crude oil with a base component such as an alkali metal hydroxide, ammonium hydroxide, or an alkali metal carbonate; and overbasing the sulfonate by admixing with an excess of base component such that the ratio: ''weight of excess base component/weight of sulfonate'' is about 0.03 to about 3.0. The anionic waterflooded additive is injected into a petroliferous formation, the formation is waterflooded and oil is recovered. 8 claims, no drawings.

• Assignee: Continental Oil Co.
• Patent Number(s): US 3924681
• OSTI ID: 7348446
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
API GRAVITY
AROMATICS
CARBON COMPOUNDS
CARBONATES
DENSITY
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
HYDROGEN COMPOUNDS
HYDROXIDES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM SULFONATES
PHYSICAL PROPERTIES
SULFONATES
SULFONIC ACID ESTERS
WATERFLOODING
WELL STIMULATION
WELLS