دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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 quality of being corrosive. cosurfactant n: a surfactant, generally an alcohol, added to a micellar solution to adjust the viscosity of the solution, maintain its stability, and prevent adsorption of the main surfactant by reservoir rock.

n: (Pl. darcys) a unit of measure of permeability. A porous medium has a permeability of 1 darcy when differential pressure of 1 atmosphere across a sample 1 centimetre long and I square centimetre in cross section will force a liquid of 1 centipoise of viscosity through the sample at the rate of 1 cubic centimetre per second. The permeability of reservoir rocks is usually so low that it is measured in millidarcys.

n: A unit of permeability. A porous medium has a permeability of 1 darcy when a pressure of 1 atm on a sample 1 cm long and 1 sq cm in cross section will force a liquid of 1 cP viscosity through the sample at the rate of 1 cc per sec.

a measurement of permeability (ability of fluids to flow through the rock). The relationship is an empirical law which states that the velocity of flow through porous media is directly proportional to the hydraulic gradient, assuming that the flow is lami

mouth of river deposits, usually fan shaped with significant variation in composition, sorting and thickness. Quality of the reservoir rock may vary widely.

where rock changes produces a reservoir rock under a sealing rock.

n: a type of sedimentary rock similar to limestone but containing more than 50 percent magnesium carbonate;sometimes a reservoir rock for petroleum.

n: A kind of natural compound whose can be expressed by CaCO3.MgCO3


calcium/magnesium carbonate rock. Dolomite is formed by chemical modification of a limestone.

n: the amount of the pore volume of a reservoir rock that is filled by water, oil, or gas and measured in routine core analysis.

the fractional or percent amount of pore space which a specific fluid occupies.

n: the reduction of permeability in a reservoir rock caused by the invasion of drilling fluid and treating fluids to the section adjacent to die wellbore. It is often called skin damage.

n: damage to the productivity of a well resulting from invasion into the formation by mud particles or mud filtrates. Asphalt from crude oil will also damage some formations.

an obstruction to flow. Usually a reduction of permeability.

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

a type of build up pressure test plot. The Horner plot uses a recording of the pressure during pressure build-up to predict its virgin reservoir pressure. The slope (m) of the extrapolated line reflects the nature of the reservoir rock and the fluids flow