Inhibition of scale formation

Patent · Tue Sep 14 04:00:00 EDT 1971

OSTI ID:5469242

Miles, L H; King, G E

A method for introducing an inhibitor against scale formation into oil well brines consists of introducing into the oil-bearing formation adjacent to the bore a relatively water or brine-insoluble polyvalent metal salt of the inhibitor, e.g., polyacrylic acid and/or hydrolyzed polyacrylamide. The method consists of in situ formation of the relatively water or brine-insoluble polyvalent metal salt of the inhibitor, e.g., polyacrylic acid and/or hydrolyzed polyacrylamide. In the in situ method, the strong acid in solution initially inhibits reaction of the salts, but is dissipated by the fluids in the oil-bearing formation and neutralized by the formation rock to allow reaction and formation of the desired water-insoluble metal salt of polyacrylic acid and/or hydrolyzed polyacrylamide in the formation. (19 claims)

• Assignee: Atlantic Richfield Co.
• Patent Number(s): CA 880849
• OSTI ID: 5469242
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ADDITIVES
ALKALINE EARTH METAL COMPOUNDS
BOREHOLES
BRINES
CAVITIES
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
DISSIPATION FACTOR
ESTERS
FLUIDS
GEOLOGIC FORMATIONS
HYDROLYSIS
INHIBITION
LYSIS
MIXTURES
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PH VALUE
POLYACRYLATES
POLYMERS
POLYVINYLS
RESERVOIR ROCK
SCALING
SOLUBILITY
SOLUTIONS
SOLVOLYSIS
WELL COMPLETION
WELL SERVICING
WELLS