Patent ID: 8851174

Claim:
A method for zone isolation comprising: selecting a foamable epoxy-based composition comprising one epoxy resin or a plurality of epoxy resins, one hardening agent or a plurality of hardening agents, one blowing agent or a plurality of blowing agents based on a temperature of an annulus between a borehole and a tubing string, where the foamable epoxy-based composition comprises a foamable low temperature epoxy-based composition adapted to cure at a curing temperature between about 50° F. of to about 90° F., a foamable mid temperature epoxy-based composition between about 90° F. to about 150° F., or a foamable high temperature epoxy-based composition between about 150° F. to about 300° F. and where the low temperature, the mid temperature and the high temperature foamable epoxy-based compositions differ in amount of epoxy resins and amount and type of hardening agents, pumping the epoxy-based composition into the annulus between the borehole and the tubing string, and allowing the composition to cure and the blowing agent to decompose to form a foam zonal isolation structure having a Poisson ratio of less than or equal to about 0.5, where the composition is compressible and where the structure continues to expand after setting allowing the structure to intrude into surface cavities and crevices of the borehole and into formations penetrated by the borehole, while adhering to the outer surface of the tubing string resulting in improved sealing and improved sealing integrity of the structure.