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natural gamma log

См. также в других словарях:

  • natural gamma-ray log — n a record of the natural radioactivity of the lithologies encountered in the borehole environment. During recording of geophysical logs, the amount of natural radiation is recorded and presented in either counts per second (CPS) or American… …   Coke&Coal Terminology

  • Gamma ray logging — is a method of measuring naturally occuring gamma radiation to characterize the rock or sediment in a borehole. It is sometimes used in mineral exploration and water well drilling, but most commonly for formation evaluation in oil and gas well… …   Wikipedia

  • Natural exponential family — In probability and statistics, the natural exponential family (NEF) is a class of probability distributions that is a special case of an exponential family (EF). Many common distributions are members of a natural exponential family, and the use… …   Wikipedia

  • Gamma function — For the gamma function of ordinals, see Veblen function. The gamma function along part of the real axis In mathematics, the gamma function (represented by the capital Greek letter Γ) is an extension of the factorial function, with its… …   Wikipedia

  • Natural logarithm of 2 — The decimal value of the natural logarithm of 2 (sequence A002162 in OEIS) is approximately as shown in the first line of the table below. The logarithm in other bases is obtained with the formula The common logarithm in particular is ( …   Wikipedia

  • Formation evaluation gamma ray — In the field of formation evaluation, gamma ray log records natural radioactivity emission of formation. Measurement of natural emission of gamma rays in oil and gas wells are particularly helpful because shales and sandstones typically have… …   Wikipedia

  • geophysical log — n a graphic record of the measured or computed physical characteristics of the rock section encountered in a borehole, plotted as a continuous function of depth. Measurements are made by a sonde which contains the detectors, as it is withdrawn… …   Coke&Coal Terminology

  • Función gamma — en el eje real. Valor absoluto de la función gamma en el plano complejo …   Wikipedia Español

  • Normal-gamma distribution — Normal gamma parameters: location (real) (real) (real) (real) support …   Wikipedia

  • Normal-scaled inverse gamma distribution — Normal scaled inverse gamma parameters: location (real) (real) (real) (real) support …   Wikipedia

  • List of oil field acronyms — Contents 1 # 2 A 3 B 4 C …   Wikipedia

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