Patent ID: 7073586
Filing Date: 2006-07-11
Classification: C09K

Abstract:
1. A method of treating an underground formation of an oil reservoir, comprising the sequential steps of a) contacting the formation with an aqueous medium, b) contacting the underground formation with a hydrocarbon fluid, c) contacting the underground formation with a solvent in the form of a glycol ether, d) contacting the underground formation with a first consolidation constituent solution, mainly comprising a poly epoxy resin derived from bisphenols, or a poly phenolic resin (novolac resins), in a solvent mainly comprising a glycol ether, in an epoxy resin concentration of from 25 to 75% (mass) and having a viscosity in the range of from 10 to 100 mPa.s, e) contacting the underground formation with second consolidation constituent substantially homogenous solution mainly comprising a curing agent in a solvent mainly comprising a hydrocarbon fluid, said curing agent occurring in a concentration in the range of from 0.5 to 20% (mass), and the solution having a viscosity such, that the ratio between the viscosity of the solution in step (d) and of the solution in step (e) is in the range of from 1.0 to 5.