Control of proppant flowback in hydraulically fractured wells

摘要

Disclosed is an improvement in a method for propping a fracture adjacent a wellbore formed by injecting in said fracture a carrier fluid containing proppant coated with a curable resin which improvement comprises:PPa) using proppant coated with a resin fluid containing a polymerizable oligomer of furfuryl alcohol resin, a catalyst comprising an oil soluble, slightly water soluble organic acid and an ester of a weak organic acid to consume water produced by the polymerization of resin;PPb) using as a carrier an aqueous saline fluid comprising water which is 70% to 100% saturated with sodium chloride,PPc) suspending said resin-coated proppant in the carrier fluid, forming a fluid mixture of resin-coated proppant and carrier fluid; and injecting said mixture into said fracture, wherein the timing of the addition of the catalyst can be varied.