Permeable cement for wells

摘要

A cement composition for forming a permeable set cement downhole comprises hydraulic cement; a particulate cross-linked aqueous gel having a size of 100 microns to 3000 microns and containing an internal temperature activated breaker; a particulate dehydrated cross-linked aqueous gel having a size of from 40 microns to 500 microns and containing an internal temperature activated breaker; and water present to form a slurry.