Core-shell particles for subterranean operations

A method of servicing a wellbore penetrating a subterranean formation, the method comprising:

• preparing a wellbore servicing composition comprising:
• (a) core-shell particles comprising a core and a shell, wherein the shell wholly or partially surrounds the core, wherein the core-shell particles do not substantially swell in water, and wherein:
• (i) the core of each of the core-shell particles comprises a particle selected from silica, alumina, titania, barite, ilmenite, iron oxide, calcium carbonate, barium sulfate, manganese tetroxide, clays, cellulosics, carbon black, bitumen, fly ash, or combinations thereof;
• and
• (ii) the shell comprises a polymer that is a polymerization product of one or more monomers and optionally one or more cross-linkers, wherein the one or more monomers include a thermally stable monomer, the one or more cross-linkers include a thermally stable cross-linker, or wherein the one or more monomers include the thermally stable monomer and the one or more cross-linkers include the thermally stable cross-linker, wherein the thermally stable cross-linker is selected from pentaerythritol allyl ether (PAE), vinyl or allyl ethers of glycols, polyglycols or polyols, N,N′-divinylethyleneurea (DVEU), divinylbenzene, divinyltetrahydropyrimidin-2(1H)-one, dienes, triallyl amine and tetraallylammonium derivatives, divinyl ether, diallyl ether, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), or a combination thereof, and wherein the thermally stable monomer is selected from N-vinylpyrrolidone (NVP), vinylbenzenesulfonate, diallyldimethyl ammonium halide, 1-vinylimidazole, 4-vinylpyridine, or a combination thereof,
• (I) wherein the one or more monomers include a thermally stable monomer selected from vinylbenzenesulfonate, 1-vinylimidazole, 4-vinylpyridine, or a combination thereof, and the one or more thermally stable cross-linkers, when also present, include a thermally stable cross-linker selected from pentaerythritol allyl ether (PAE), vinyl or allyl ethers of glycols, polyglycols or polyols, N,N′-divinylethyleneurea (DVEU), divinylbenzene, divinyltetrahydropyrimidin-2(1H)-one, dienes, triallyl amine and tetraallylammonium derivatives, divinyl ether, diallyl ether, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), or a combination thereof;
• or
• (II) wherein the one or more cross-linkers include a thermally stable cross-linker selected from pentaerythritol allyl ether (PAE), vinyl ethers of glycols, polyglycols or polyols, N,N′-divinylethyleneurea (DVEU), divinylbenzene, divinyltetrahydropyrimidin-2(1H)-one, dienes, triallyl amine and tetraallylammonium derivatives, divinyl ether, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), or a combination thereof, and the one or more thermally stable monomers, when also present, include a thermally stable monomer selected from N-vinylpyrrolidone (NVP), vinylbenzenesulfonate, diallyldimethyl ammonium halide, 1-vinylimidazole, 4-vinylpyridine, or a combination thereof;
• and
• (b) a carrier fluid;
• and
• placing the wellbore servicing composition into the wellbore, the subterranean formation or both,
• wherein thermally stable indicates that inclusion of the thermally stable monomer, the thermally stable cross-linker, or both the thermally stable monomer and the thermally stable cross-linker in the wellbore servicing composition provides for stability of the core-shell particles as indicated by maintenance of association of the core with the shell of the core-shell particles at temperatures of greater than or equal to at least about 300° F. (148.9° C.).

A method of treating a portion of a subterranean formation comprising:

• introducing a wellbore servicing composition into the subterranean formation, wherein the wellbore servicing composition comprises:
• a base fluid;
• and core-shell particles comprising a core and a shell, wherein the shell wholly or partially surrounds the core, wherein the core-shell particles do not substantially swell in water, and wherein:
• (i) the core of each of the core-shell particles comprises silica, alumina, titania, barite, ilmenite, iron oxide, calcium carbonate, barium sulfate, manganese tetroxide, clays, cellulosics, carbon black, bitumen, fly ash, or combinations thereof;
• and (ii) the shell comprises a polymer that is a polymerization product of one or more monomers and optionally one or more cross-linkers, wherein the one or more monomers include a thermally stable monomer, the one or more cross-linkers include a thermally stable cross-linker, or wherein the one or more monomers include the thermally stable monomer and the one or more cross-linkers include the thermally stable cross-linker, wherein the thermally stable cross-linker is selected from pentaerythritol allyl ether (PAE), vinyl or allyl ethers of glycols, polyglycols or polyols, N,N′-divinylethyleneurea (DVEU), divinylbenzene, divinyltetrahydropyrimidin-2(1H)-one, dienes, triallyl amine and tetraallylammonium derivatives, divinyl ether, diallyl ether, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), or a combination thereof, and wherein the thermally stable monomer is selected from N-vinylpyrrolidone (NVP), vinylbenzenesulfonate, diallyldimethyl ammonium halide, 1-vinylimidazole, 4-vinylpyridine, or a combination thereof,
• (I) wherein the one or more monomers include a thermally stable monomer selected from vinylbenzenesulfonate, 1-vinylimidazole, 4-vinylpyridine, or a combination thereof, and the one or more thermally stable cross-linkers, when also present, include a thermally stable cross-linker selected from pentaerythritol allyl ether (PAE), vinyl or allyl ethers of glycols, polyglycols or polyols, N,N′-divinylethyleneurea (DVEU), divinylbenzene, divinyltetrahydropyrimidin-2(1H)-one, dienes, triallyl amine and tetraallylammonium derivatives divinyl ether, diallyl ether, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), or a combination thereof, or
• (II) wherein the one or more cross-linkers include a thermally stable cross-linker selected from pentaerythritol allyl ether (PAE), vinyl ethers of glycols, polyglycols or polyols, N,N′-divinylethyleneurea (DVEU), divinylbenzene, divinyltetrahydropyrimidin-2(1H)-one, dienes, triallyl amine and tetraallylammonium derivatives, divinyl ether, diallyl ether, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), or a combination thereof, and the one or more thermally stable monomers, when also present, include a thermally stable monomer selected from N-vinylpyrrolidone (NVP), vinylbenzenesulfonate, diallyldimethyl ammonium halide, 1-vinylimidazole, 4-vinylpyridine, or a combination thereof;
• and
• causing or allowing the wellbore servicing fluid to stabilize and/or reduce fluid loss into permeable areas of the subterranean formation.