دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the encroachment of reservoir water or gas into the oil column and well because of production. The water or gas tends to rise near the well bore and assume a conical shape.

the movement of a water upwards or gas downwards towards a decrease in pressure caused by producing hydrocarbons in a zone with no vertical permeability boundaries.

n: the permeability of reservoir rock parallel to the bedding plane. Compare vertical permeability.

vertical permeability.

n: the plane (typically a zone several feet thick) at which the bot- tom of an oil sand contacts the top of a water sand in a reservoir, i.e., the oil-water interface.

local boundary between the oil and the bottom water. OW Contact may vary in the field depending on individual drawdowns and local variations in vertical permeability.

n: an irregular surface, generally parallel to a depositional layer, in which small, toothlike projections on one side of the surface fit into cavities of complementary shape on the other surface.

a pressure dissolution feature in a layered reservoir, often a vertical permeability barrier.

n: the permeability of a pay zone from the bottom to the top of the zone. Compare horizontal permeability.

n: the upward encroachment of water into a well caused by pressure drawdown from production.

movement of water upward into oil strata in response to production of oil and lower reservoir pressures. May be localized in areas of high vertical permeability.