Acidizing concentrates for oil well acidizing systems

Details Acidizing concentrates for oil well acidizing systems Acidizing concentrates for oil well acidizing systems

E - Fixed Constructions

21

B

31/32

E21B 43/27 (2006.01) C09K 8/74 (2006.01)

Patent

CA 1261134

ABSTRACT OF THE DISCLOSURE: The subject invention relates to acidizing con- centrates used to prepare acidizing systems for oil and gas recovery. The additives comprise: (a) a C4-C112 aliphatic alcohol, and (b) a polyether nonionic surfactant having the following structural formula: Image wherein R is the residue of an aliphatic alcohol having 2 to 10 carbon atoms resulting from the oxyalkylation of a corresponding aliphatic alcohol having a functionality equal to n, and n has a value of 2 to 3; and wherein X and Y are numbers such that the ratio of X to Y is from 8:1 to 0.31 and the total molecular weight of the molecule is from 1,000 to 15,000. The weight ratio of additives (a) to (b) is from 10:1 to 1:10.

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