دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the process of recording the acoustic characteristics of sub- surface formations, based on the time required for a sound wave to travel a specific distance through rock. The rate of travel depends on the composition of the formation, its porosity, and its fluid content. Also called sonic logging.

n: 1. in general, a substance added in small amounts to a larger amount of another substance to change some characteristic of the latter. In the oil industry, additives are used in lubricating oil, fuel, drilling mud, and cement. 2. in cementing, a substance added to cement to change its characteristics to satisfy specific conditions in die well. A cement additive may work as an accelerator, retarder, dispersant, or other reactant.

n: The agent put into the drilling fluid in order to change some performances of the drilling fluid or slurry.

a compound incorporated into a gas, liquid, or solid system to alter the properties for a particular purpose.

n: a body of air that remains for an extended period of time over a large land or sea area with uniform heating and cooling properties. The air mass will acquire characteristics (such as temperature and moisture content) of the underlying region.

n: an area over which an air mass rests and develops temperature and moisture characteristics typical of that location.

carbon and hydrogen compounds that may be branched of straight chained. Aliphatics may be paraffin (saturated) or olefinic (unsaturated).

n: A kind of non-ionics, used as foaming agent and emulsifier of foam drilling fluid.

a comparable reservoir with many similar characteristics (e.g., lithology, depositional environment, porosity, perm, drive mechanism, produced fluids, etc.) that can be used for behavior projections comparison studies.

n: the lowest temperature at which the chemical aniline and a solvent (such as the oil in oil-base muds) will mix completely. In general, the oil of oil-base muds should have an aniline point of at least 150F (66"C) to obtain maximum service life from the rubber components in the mud system.

n: The lowest temperature in which the same volume of oil and aniline dissolve in each other.

the aromatics content of a mixture.

n: The technique used in drilling in order to explore and exploit reservoir. Mainly including wellbore designing, bit choosing, drilling parameter optimization, deviation controling, drilling fluid choosing and drilling hydraulics.

n: See permafrost.