Patent ID: 8899328
Filing Date: 2014-12-02
Classification: C04B,C09K,E21B

Abstract:
1. A method for zone isolation comprising: varying a composition of an epoxy-based composition depending on a borehole temperature to form a temperature specific epoxy-based composition, where the epoxy-based composition comprises an epoxy resin or a plurality of epoxy resins and a temperature specific curing system, where the temperature specific curing system comprises: (a) a high temperature curing system including an alkoxylated polyamine or mixture of alkoxylated polyamines for high borehole temperatures having a value between about 150° F. to about 300° F. to form a high temperature epoxy-based composition, (b) a mid temperature curing system including imidazoline or a mixture of imidazolines for moderate borehole temperatures having a value between about 90° F. and about 150° F. to form a mid-temperature epoxy-based composition, and (c) a low temperature curing system including pyrrole, pyridine, piperidine or mixtures thereof for low temperature borehole temperatures having a value between about 50° F. and about 90° F. to form a low temperature epoxy-based composition, pumping the temperature specific epoxy-based composition in an annulus between a borehole and a tubing string, and allowing the composition to cure to form a zonal isolation structure, where the zonal isolation structure is compressible.