Patent ID: 8975217
Filing Date: 2015-03-10
Classification: C09K

Abstract:
1. A method for treating a portion of a well, the method comprising the steps of: (A) forming a treatment fluid, the treatment fluid comprising: wherein a test fluid consisting essentially of, in the same proportions as in the treatment fluid: is capable of: when tested by heating the test fluid at a constant rate from an initial temperature of 25° C. to at least one elevated temperature in the range of 50° C.-100° C. over the course of 10 minutes and then maintained at that elevated temperature; and (B) introducing the treatment fluid into the well; wherein the chelating agent comprises at least one of the following chemical structures having an aromatic ring and wherein X and Y are vicinal: wherein X and Y each independently is selected from the group consisting of —O—, —COR, —O wherein R, R1, and R2 are independently H, or alkyl groups containing 1-4 carbons; wherein A wherein Z can be S, O, or NH; and wherein the aromatic ring is selected from the group consisting of a benzene ring, a pyridine ring, a thiophene ring, a pyrrole ring, a naphthalene ring, an anthracene ring, and a phenanthrene ring.