METHODS FOR SERVICING SUBTERRANEAN WELLS

摘要

Lost circulation in a subterranean well may be controlled by placing into the lost-circulation zone a first fluid comprising a swellable material, followed by a second fluid comprising a plugging material. The swellable material may be oil-swellable, water-swellable or both. The plugging materials may comprise granular materials, lamellar materials, fibers and combinations thereof.