Acidizing concentrates for oil well acidizing systems

Patent · Tue Jun 30 04:00:00 EDT 1987

OSTI ID:6209486

Crema, S C

An acidizing composition is described for treating oil-bearing formations comprising: (a) from about 90 to about 99.99 percent by volume of an aqueous acid solution; and (b) from about 0.01 to about 10 percent by weight of an acidizing concentrate consisting of: a mixture of a branched-aliphatic C/sub 3/-C/sub 6/ alcohol and a branched aliphatic C/sub 7/-C/sub 10/ alcohol; and an effective amount of a non-ionic polyether surfactant to render the alcohols soluble in the acid. The surfactant has the formula: R is the oxyalkylation residue of a C/sub 2/-C/sub 10/ diol or triol; n is an integer of 2 or 3, X and Y are numbers such that the ratio of X to Y is from 8:1 to 0.3:1; and the total molecular weight of the molecule is from 1,000 to 15,000. The weight ratio of the mixture of alcohols to the nonionic surfactant is from 10:1 to 1:10. The composition is capable of dissolving sludge deposits in the oil-bearing formations.

• Assignee: BASF Corp., Wyandotte, MI
• Patent Number(s): US 4676916
• OSTI ID: 6209486
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
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Plowshare-- (-1989)
ACIDIZATION
ADDITIVES
ALCOHOLS
ALKYLATION
AQUEOUS SOLUTIONS
CHEMICAL REACTIONS
DISPERSIONS
DISSOLUTION
ENERGY SOURCES
ENHANCED RECOVERY
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROXY COMPOUNDS
MIXTURES
NATURAL GAS
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
PETROLEUM
QUANTITY RATIO
RECOVERY
SLUDGES
SOLUTIONS
STIMULATION
SURFACTANTS
WELL STIMULATION
WELLS