دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a loosely arranged, apparently unstratified section of rock.

n: The formation that containing lesser cementing material,and havent well solidated between mineral grains.

formations with insufficient cementing agents between the grains to stop movement of individual grains when fluid flows through the formation. Usually less than 2 to 10 psi compressive strength.