DELAYED WATER-SWELLING MATERIALS AND METHODS OF USE

摘要

A water absorbing composition includes a particle having a core of a wate r- swelling material. A coating substantially surrounds the core that tempor arily prevents contact of water with the water-swelling material. The coatin g may be formed from a layer of water degradable material or a non-water-deg radable, non- water absorbent encapsulating layer. A quantity of particles i ncluding delayed water-swelling particles formed at least in part from a wat er-swelling material and, optionally, non- water-swelling particles of the s ame or different size distributions can be used in treating a formation pene trated by a wellbore. A slurry of the particles is formed with a carrier flu id. The slurry of particles is introduced into the wellbore of the formation to facilitate treatment.