دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an area within a permeable rock adjacent to a wellbore into which a filtrate (usually water) from the drilling mud has passed, with consequent partial or total displacement of the fluids originally present in the zone.

n: The volume close to the borehole wall in which some or all of the moveable fluids have been displaced by mud filtrate. It consists of the flushed zone and the transition zone or annulus. In simple models, the invaded zone and the flushed zone are consider

the part of the rock next to the wellbore into which wellbore fluid has leaked.