Method for selective plugging of wells

Patent · Tue Jul 31 04:00:00 EDT 1973

OSTI ID:7018927

Friedman, R H; Krause, J D; Bradford, W R

A composition is provided for use in selectively plugging water-rich strata of a subterranean formation so that the oil-to-water ratio of production will be increased. The composition includes an aqueous solution of sodium carboxymethyl cellulose, chromium potassium sulfate, and orthocresol. Methods for selective plugging include injection of the selective plugging composition into subterranean formations having water-rich and oil-rich strata whereupon the material, after a significant period of time, assumes a much greater viscosity in the water-rich strata. Pretreatment and post-treatment options are provided for improving results under certain conditions. (8 claims)

• Assignee: Getty Oil Co.
• Patent Number(s): US 3749174
• OSTI ID: 7018927
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
ALKALI METAL COMPOUNDS
AROMATICS
CARBOHYDRATES
CELLULOSE
CHROMIUM COMPOUNDS
CHROMIUM SULFATES
CRESOLS
GEOLOGIC FORMATIONS
HYDROXY COMPOUNDS
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
PLUGGING
POLYSACCHARIDES
POTASSIUM COMPOUNDS
POTASSIUM SULFATES
RESERVOIR ROCK
SACCHARIDES
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VISCOSITY
WELLS