Patent ID: 8361938
Filing Date: 2013-01-29
Classification: C09K

Abstract:
1. A method for stimulating the production of a subterranean oil or gas well, comprising the steps of: (a) selecting a subterranean zone with underground resources in a reservoir that is penetrated by a well bore; (b) preparing a mixture of a stimulation fluid consisting of: a non-toxic, low pH acidic composition with antimicrobial properties prepared by the process of combining a high purity acid with water and an ammonium compound or a metallic sulfate, heating the mixture to approximately 140° F. to form mixture (I), placing mixture (I) in a pressurized vessel and heating the mixture, under pressure, to temperatures in a range between approximately 200° F. and 400° F., then, cooling the mixture, after the mixture is cooled, adding a stabilizing amount of the starting mixture (I), an aqueous based continuous phase that has the characteristics of brine and a proppant; wherein the mixture has a pH of less than 6.5; and (c) pumping the mixture of step b) into the well bore under a predetermined pressure and in a predetermined volume to fracture the formation and permit the underground resource to flow from the reservoir into the well bore.