US 9,840,656 B2  4  3  needed; and the ability to retain tackiness of the coated  surface even after obtaining consolidation of the proppant  pack.  In certain embodiments of the present invention, a method  of treating a subterranean formation comprises placing a first  stream comprising a hardenable acid curing resin, and a  hydrolysable strong acid ester into a wellbore in a subter› ranean formation, said formation comprising unconsolidated  particulates, wherein said ester upon hydrolyzing yields an  acid with a  pKa  at or below about 3; and forming consoli› dated particulates upon the contacting of the unconsolidated  particles with the reaction product of the hardenable acid  curing resin, hydrolysable strong acid ester and water in the  formation.  Some embodiments of the present invention provide a  method for treating a well including providing a wellbore in  a subterranean formation; providing a first fluid comprising  a hardenable acid curing resin and a hydrolysable strong  acid ester, wherein said ester upon hydrolyzing yields an  acid with a  pKa  at or below about 3; providing proppant  particulates; coating the proppant particulates with the first  fluid; providing a second stream comprising a diluent fluid;  creating at least one fracture in said subterranean formation;  placing a first stream comprising the coated proppant par› ticulates and the second stream into the subterranean for› mation and into at least one fracture therein; wherein the  proppant particulates form a proppant pack in the at least one  fracture; and forming consolidated proppant particulates  upon the curing of the coated proppant particulates in the  proppant pack upon hydrolyzing of at least a portion of said  strong acid ester.  Another embodiment of the invention includes a well  treatment system including a well treatment apparatus con› figured to: place a first stream comprising a hardenable acid  curing resin and a hydrolysable strong acid ester into a  wellbore in a subterranean formation, said formation com› prising unconsolidated particulates, wherein said ester upon  hydrolyzing yields an acid with a  pKa  at or below about 3;  and form consolidated particulates upon the contacting of  the unconsolidated particles with the reaction product of the  hardenable acid curing resin, hydrolysable strong acid ester,  and water in the formation.  In one embodiment, a method of treating a well bore in a  subterranean formation includes providing a first fluid com› prising a hardenable acid curable resin and a hydrolysable  strong acid ester, wherein said ester upon hydrolyzing yields  an acid with a  pKa  at or below about 3; providing a diluent  fluid; placing a first stream comprising the first fluid and the  diluent fluid into a zone in the subterranean formation, said  zone comprising unconsolidated particulates; hydrolyzing at  least a portion of said ester in said formation; and forming  consolidated particulates upon the contacting of the uncon› solidated particles with the reaction product of the harden› able acid curable resin and hydrolysable strong acid ester  upon hydrolyzing in the formation. In certain embodiments,  the forming includes reacting the hardenable acid curable  resin, hydrolysable strong acid ester, and water in the  formation, thereby forming a reaction product. In further  embodiments, the reaction product is cured to the uncon› solidated particulates. In some embodiments, the hardenable  acid curable resin includes melamine resins with secondary  amino groups. These melamine resins may comprise a resin  selected from the group consisting of phenolic; furan; alde› hyde; novolac; epoxy; and combinations thereof. In an  exemplary embodiment, the resin is a furan resin. In certain  embodiments, the hardenable acid curable resin is present in  the amount of about 0.1 % to about 15% by weight of the  diluent fluid. In some embodiments, the hydrolysable strong  acid ester comprises at least one member selected from the  group consisting of methyl tosylate and homologous series;  methyl methane sulfonate and homologous series; methyl  trichloroacetate and homologous series; methyl trifluroac› etate and homologous series; dimethyl methylphosphonate  and homologous series; and any combination thereof. In  exemplary embodiments, the hydrolysable strong acid ester  comprises a tosylated ester. In certain embodiments, the  hydrolysable strong acid ester is present in the amount of  about 0.01 % to about 5% by weight of the diluent fluid. In  some embodiments, said ester upon hydrolyzing yields an  acid with a  pKa  value at or below about one of the following:  2.5, 2, 1.5, 1, 0.5, 0, -0.5, -1, -1.5, -2, -2.5, -3, -3.5, -4,  -4.5, and -5. In an embodiment, the hydrolysable strong  acid ester produces a fluid with a pH of about 3.0 or less  upon being hydrolyzed by water in the formation. In other  embodiments, the hydrolysable strong acid ester is encap› sulated in a hydrolysable material. In certain embodiment,  the diluent fluid comprises a non-aqueous base fluid. In  further embodiments, at least one of the hardenable acid  curable resin and the hydrolysable strong acid ester is  soluble in the diluent fluid. In several embodiments, the first  stream further comprises a catalyst, wherein the catalyst  comprises at least one member selected from organic amine  bases, inorganic bases, and mixtures thereof. In exemplary  embodiments, the organic amine base is selected from the  following group consisting of pyridine, isoquinoline, qui› noline,  N,N-dimethy lcyclohexy !amine,  tributy !amine,  tripropylamie, N-ethylmorpholine,  dimethylaniline, and  mixtures thereof. In other embodiments, the inorganic base  is selected from the following group consisting of potassium  hydroxide, sodium hydroxide, ammonium hydroxide, and  mixtures thereof. In certain embodiments, the catalyst is  present in the amount of about 0.01 % to about 5% by weight  of the diluent fluid. In some embodiments, the first stream  may include a silane coupling agent. In exemplary embodi› ments, the silane coupling agent includes at least one mem› ber selected from the group consisting ofN-2-(aminoethyl)- 3-aminopropyltrimethoxysilane;  3-glycidoxypropy ltrimethoxysilane;  n-beta-( aminoethy 1)› gamma-aminopropyl trimethoxysilane; and combinations  thereof. In certain embodiments, the coupling agent is  present in the amount of about 0.01 % to about 2% by weight  of the diluent fluid. In some embodiments, the first stream  further comprises a surfactant for facilitating the contacting  of the unconsolidated particulates with the reaction product.  In exemplary embodiments, the surfactant comprises at least  one member selected from the group consisting of an  ethoxylated nonyl phenol phosphate ester; mixtures of one  or more cationic surfactants; a C$_{12}$-C$_{22 }$ alkyl phosphonate  surfactant; a mixture of one or more non-ionic surfactants;  an alkyl phosphonate surfactant; and mixtures thereof. In  certain embodiments, the surfactant is present in the amount  of about 0.01 % to about 5% by weight of the diluent fluid.  Some embodiments of the present invention provide a  method for treating a well including providing a wellbore in  a subterranean formation; providing a first fluid comprising  a hardenable acid curing resin and a hydrolysable strong  acid ester, wherein said ester upon hydrolyzing yields an  acid with a  pKa  at or below about 3; providing proppant  particulates; coating the proppant particulates with the first  fluid; providing a second stream comprising a diluent fluid;  creating at least one fracture in said subterranean formation;  placing a first stream comprising the coated proppant par› ticulates and the second stream into the subterranean for› mation and into at least one fracture therein; wherein the 