Patent ID: 7994100
Filing Date: 2011-08-09
Classification: C09K

Abstract:
1. A method for reversibly positioning a gel in a permeable formation, comprising the steps of: providing a reversible gelling system comprising: a polymer; a crosslinker; a gel accelerator; and an oxidant, wherein temperature activates the crosslinker so as to cause the system to form a gel, and the oxidant subsequently decomposes the gel; pumping the system into a well communicated with the permeable formation whereby the system flows to the permeable formation; wherein formation temperature causes the system to form a gel in the permeable formation; and allowing the gel to stay in the permeable formation until the gel decomposes, wherein the polymer, crosslinker, gel accelerator, and oxidant are dissolved in an organic solvent and wherein the polymer, crosslinker, gel accelerator and oxidant are present in the system in amounts as follows: polymer between about 2 and about 4% wt.; crosslinker between about 2.00 and about 4.00% wt.; gel accelerator between about 0.10 and about 1.00% wt.; and oxidant between about 0.30 and about 1.50% wt.