WATER-SWELLABLE LOST CIRCULATION MATERIALS

摘要

Lost circulation compositions, systems, and methods of using the same are described. A lost circulation composition comprises a water-swellable starch graft copolymer; and a carrier fluid. A method for bridging a lost circulation zone comprises providing a lost circulation composition comprising a water-swellable starch graft copolymer and a carrier fluid. Then introducing the lost circulation composition into a wellbore within a subterranean formation, wherein the subterranean formation comprises a lost circulation zone. Finally the lost circulation composition is placed into the lost circulation zone.