Imparting in situ stability to displacing fluids

Patent · Tue Jul 14 04:00:00 EDT 1970

OSTI ID:7093175

Jones, S C

An aqueous preslug containing electrolyte an/or isopropanol was injected before a micellar-polymer flood to inhibit the tendency of the formation to degrade the flood. Berea cores were saturated with water from Henry lease in Illinois (18,000 ppm TDS), flooded with Henry crude (7 cp viscosity at 72/sup 0/F, specific gravity 0.843), and waterflooded with Henry water. A recovery of 86.3 percent OIP was obtained with the following preslug, micellar slug, and polymer flood. The preslug contained water from the water reservoir in Palestine, Illinois (400 ppm TDS) and sodium hydroxide. Ammonium petroleum sulfonate, Henry crude, isopropanol, nonyl phenol, sodium hydroxide, and Palestine water were combined to form the water-external micellar slug. The polymer flood was composed of Pusher 530, Palestine water, isopropanol, and ammonium thiocyanide.

• Assignee: Marathon Oil Co.
• Patent Number(s): US 3520366
• OSTI ID: 7093175
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
COLLOIDS
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOSSIL FUELS
FUELS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
STABILITY
SULFONATES
SULFONIC ACID ESTERS
WELLS