CONTROL OF PROPPANT FLOWBACK IN HYDRAULICALLY FRACTURED WELLS

摘要

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 comprises: a) 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; b) using as a carrier an aqueous saline fluid comprising water which is 70% to 100 % saturated with sodium chloride; c) 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.