US Patent 9796902 Sealant compositions for use in subterranean formation operations

Methods comprising providing a sealant composition comprising an aqueous base fluid and a crosslinkable polymer composition, wherein the crosslinkable polymer composition comprises a crosslinkable organic polymer and a crosslinker; introducing an elastic gellable composition into the sealant composition, wherein the elastic gellable composition is an aqueous emulsion comprising an aqueous continuous phase and a dispersed phase comprising elastomeric polymers; introducing the sealant composition into a subterranean formation; and crosslinking the sealant composition into a gel to form a seal in the subterranean formation, thereby forming an elastic gelled sealant composition, wherein the elastic gellable composition reduces the brittleness of the elastic gelled sealant composition as compared to the sealant composition without the elastic gellable composition.