Patent ID: 11959020
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 0:
1. A method of reducing a rate of carbonate dissolution in a carbonate acidizing treatment of a carbonate formation, the method comprising:
dissolving one or more retarder compounds in a solution comprising acid to form an acidizing retarder composition, wherein the acid consists of strong mineral acid, wherein at least one of the one or more retarder compounds comprises a poloxamer, and wherein the acidizing retarder composition comprises from 0.5 weight percent to 5 weight percent of the one or more retarder compounds based on the total weight of the acidizing retarder composition; and
introducing the acidizing retarder composition to the carbonate formation, wherein the rate of carbonate dissolution in the presence of the acidizing retarder composition is reduced by an amount of from 50% to 95%, relative to a rate of carbonate dissolution in the absence of the acidizing retarder composition;
wherein the poloxamer comprises a compound of formula (I):, , in which x and z are each independently an integer from 50 to 150; and, in which y is an integer from 20 to 80.