دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: pressure exceeding or falling below the pressure to be expected at a given depth. Normal pressure increases approximately 0.465 pow1ds per square inch per foot of depth or 10.5 kilopascals per metre of depth. Thus, normal pressure at 1,000 feet is 465 pounds per square inch;at 1,000 metres it is 10,500 kilopascals. See pressure gradient.

n: A formation pressure that deviates from the normal formation fluid hydrostatic pressure. Such pressure may be classified as "subnormal" (lower than normal) or "overpressured" (higher than normal).

n: a declaration or an avowal of any act or fact made by a signatory party to a document to a notary public or other public official authorised to take an acknowledgement to give it legal effect.

n: a record of the measurement of porosity, done by comparing depth to the time it takes for a sonic impulse to travel through a given length of formation. The rate of travel of the sound wave through a rock depends on the composition of the formation and the fluids it contains. Because the type of formation can be ascertained by other logs, and because sonic transit time varies with relative amounts of rock and fluid, porosity can usually be determined in this way.

n: A display of traveltime of acoustic waves versus depth in a well. The term is commonly used as a synonym for a sonic log. Some acoustic logs display velocity.

the range of wavelength energy that can be adsorbed by a given formation.

adj: of or pertaining to an instrument that measures a continuous variable that is proportional to another variable over a given range. For example, temperature can be represented or measured as voltage, its analog.

n: the viscosity of a drilling fluid as measured with a directindicating, or rotational, viscometer.

n: The viscosity a fluid appears to have on a given instrument at a stated rate of shear. It is a function of the plastic viscosity and the yield point. The apparent viscosity in centipoises, as determined by the direct-indicating viscometer, is equal to the

the viscosity at a given shear rate and a given temperature.

n: as applied to gas, a given sendout of gas remaining fairly constant over a period of time and usually not temperature sensitive. For example, residential base load is a given send-out of gas consumed by clothes dryers, water heaters, and in cooking. base map n: horizontal representation of nongeologic surface features such as streams, roads, buildings, survey benchmarks, and property lines.

n: a report that lists each bit used during a drilling operation, giving the type, the footage it drilled. the formation it penetrated, its condition, and so on.

a record of bit run, depth, rate of penetration, etc., in a wellbore.

nipple that can be blocked off from formation pressure and give a false pressure measurement.

n: how much weight the brake can stop in a given length of time. branch line n: a line, usually a pipe, joined to and diverging from another line. branded distributor n: gasoline wholesaler who, under the suppliers brand name, provides his or her own financing, transportation, and storage and who may also retail.