دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a large, sloping sedimentary deposit at the mouth of a canyon, laid down by intermittently flowing water, especially in arid climates, and composed of gravel and sand. The deposit tends to be coarse and unworked, with angular, poorly sorted grains in thin, overlapping sheets. A line of fans may eventually coalesce into an apron that grows broader and higher as the slopes above are eroded away.

land counterpart of a river delta. Characteristic of sediments that have been transported by a fast moving stream then dropped out of the flow as the stream velocity drops as it spreads out. Typical of zones of heavy water runoff such as found at the base

unconsolidated to well sorted to poorly sorted (gravel to sand sized) particles transported by water.

the initial wave of gravel transport when packing a well with a deviation over 55o.

a patented screen design that allows gravel packing slurry to flow past an annular bridge point that would normally stop the placement of gravel.

n: an artificial gravel island sometimes used in shallow Arctic waters as a base on which drilling and production equipment is erected.

n: reservoir rock formed from a mass of sand, gravel, or alluvium deposited on the bed of a stream, sea, or lake by waves and currents.

n: the gravel and coarse sand that are rolled and bounced along the bottom of a flowing stream. Compare dissolved load, suspended load.

the sediment that moves slowly along the bottom of a river channel.

the returning wave of gravel after the alpha wave when packing a well over about 55o deviation.

a sand control completion that uses a screen and a gravel pack to stop formation sand production.