Oil recovery process employing a complexed polysaccharide

Patent · Tue Feb 03 04:00:00 EST 1987

OSTI ID:6904472

Sampath, K

This patent describes a method wherein a fluid medium is introduced into a borehole in the earth and into contact with a subterranean formation penetrated by the borehole. The improvement described here is wherein at least a portion of the fluid medium comprises an aqueous gel and wherein the gel comprises water having incorporated therein: a water thickening amount of a member selected from the group consisting of titanium ion and chromium ion complex of a fungal polysaccharide, having a linear chain of anhydroglucose units linked beta 1-3 with 30-35% of the linear chain units and bearing single appended anhydroglucose units linked beta 1-6. The complex is prepared by forming a water solution of the polysaccharide and adding thereto a water soluble reducing agent and a water soluble member selected from the group consisting of titanium compounds and chromium dichloride to form the complex.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4640358
• OSTI ID: 6904472
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALDEHYDES
AQUEOUS SOLUTIONS
BOREHOLES
CARBOHYDRATES
CAVITIES
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM CHLORIDES
CHROMIUM COMPOUNDS
COLLOIDS
DISPERSIONS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
GELS
GLUCOSE
HALIDES
HALOGEN COMPOUNDS
HEXOSES
HYDROGEN COMPOUNDS
MIXTURES
MONOSACCHARIDES
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
POLYSACCHARIDES
QUANTITY RATIO
RECOVERY
SACCHARIDES
SOLUBILITY
SOLUTIONS
STIMULATION
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WATER
WELL STIMULATION
WELLS