دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a porous, permeable, irregularly shaped sedimentary deposit surrounded by impervious rock.2. a lenticular sedimentary bed that pinches out, or comes to an end, in all directions.

a permeable, often small sedimentary deposit bordered by impermeable rock.

n: a steel lever with a pointed projection at one end;it is used to lift a heavy load.

v: to decrease the size of the opening of an adjustable choke when a kick is being circulated out of a well.

loss of permeability in a reservoir rock. Often so severe that the pinch out becomes a barrier or a seal.

n: an oil-bearing stratum that forms a trap for oil and gas by narrowing and tapering off within an impervious formation.

n pl: nonuniformities in the structure of properties of petroleum reservoirs, such as lenticular formation, pinch-outs, faults that cut across the reservoir, shale barriers, and variations in permeability.