• Density logging is a well logging tool that can provide a continuous record of a formation's bulk density along the length of a borehole. In geology,...
    4 KB (629 words) - 20:53, 22 May 2023
  • Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole...
    32 KB (4,114 words) - 13:42, 16 February 2024
  • In statistics, the negative log predictive density (NLPD) is a measure of error between a model's predictions and associated true values. A smaller value...
    3 KB (547 words) - 20:37, 7 August 2024
  • are: nuclear porosity logs and sonic logs. The two main nuclear porosity logs are the Density and the Neutron log. Density logging tools contain a caesium-137...
    27 KB (4,344 words) - 23:26, 16 February 2024
  • distributions (a more general definition is discussed below). Given a probability density or mass function x ↦ f ( x ∣ θ ) , {\displaystyle x\mapsto f(x\mid \theta...
    64 KB (8,534 words) - 19:57, 20 July 2024
  • log PLR – pig launcher/receiver PLS – position location system PLSV – pipelay support vessel PLT – production logging tool PLTQ – production logging tool...
    98 KB (11,974 words) - 09:53, 29 October 2024
  • A caliper log is a well logging tool that provides a continuous measurement of the size and shape of a borehole along its depth and is commonly used in...
    3 KB (511 words) - 16:18, 21 July 2024
  • estimate is based on the simultaneous use of neutron and density logs. Under normal logging conditions, the porosity estimates obtained from these tools...
    8 KB (1,270 words) - 15:34, 9 February 2024
  • In mathematics, the Dirichlet density (or analytic density) of a set of primes, named after Peter Gustav Lejeune Dirichlet, is a measure of the size of...
    3 KB (592 words) - 20:41, 14 September 2023
  • spectral density), and that is why CNR estimation techniques are timely and important. In satellite communications, carrier-to-noise-density ratio (C/N0)...
    6 KB (838 words) - 09:16, 5 October 2024
  • Underwater logging is the process of logging trees from underwater forests. When artificial reservoirs and dams are built, large areas of forest are often...
    11 KB (1,465 words) - 04:01, 13 October 2024
  • Thumbnail for Log-normal distribution
    standard normal distribution, then we have that the probability density function of the log-normal distribution is given by: f X ( x ) = d d x   P X [  ...
    80 KB (11,823 words) - 06:13, 28 September 2024
  • In number theory, natural density, also referred to as asymptotic density or arithmetic density, is one method to measure how "large" a subset of the...
    11 KB (1,757 words) - 00:54, 29 August 2024
  • Thumbnail for Medium-density fibreboard
    Medium-density fibreboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibre, often in a defibrator...
    18 KB (2,285 words) - 14:28, 13 October 2024
  • Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA)...
    6 KB (720 words) - 11:33, 14 July 2024
  • Thumbnail for Hardboard
    Hardboard, also called high-density fiberboard (HDF), is a type of fiberboard, which is a pressed wood or engineered wood product. It is used in furniture...
    7 KB (751 words) - 11:17, 9 October 2024
  • Thumbnail for Nucleic acid quantitation
    using the nearest-neighbor model. The optical density is generated from equation: Optical density= Log (Intensity of incident light / Intensity of Transmitted...
    15 KB (1,748 words) - 00:03, 15 October 2024
  • Thumbnail for Continuous uniform distribution
    than that it is contained in the distribution's support. The probability density function of the continuous uniform distribution is f ( x ) = { 1 b − a...
    27 KB (4,219 words) - 07:31, 30 October 2024
  • this is the case, spectral gamma ray logging should be done to identify the source of these anomalies. Spectral logging is the technique of measuring the...
    7 KB (869 words) - 23:12, 4 December 2022
  • Thumbnail for Old-growth forest
    and geographic variables. Logging in old-growth forests is a contentious issue in many parts of the world. Excessive logging reduces biodiversity, affecting...
    55 KB (6,200 words) - 00:10, 31 October 2024
  • Thumbnail for Whitestone Logging Camp, Alaska
    Whitestone Logging Camp (Lingít: Yan Kashada Tináa) is a census-designated place (CDP) on Chichagof Island in Hoonah-Angoon Census Area, Alaska, United...
    7 KB (494 words) - 22:00, 18 April 2024
  • equivalent to the total porosity derived from the density log when representative values for matrix and fluid density are used. The clay layers contain  OH− groups...
    16 KB (2,189 words) - 21:56, 12 June 2024
  • Chebotarev's density theorem in algebraic number theory describes statistically the splitting of primes in a given Galois extension K of the field Q {\displaystyle...
    13 KB (2,077 words) - 13:40, 2 March 2023
  • Salvage logging is the practice of logging trees in forest areas that have been damaged by wildfire, flood, severe wind, disease, insect infestation, or...
    12 KB (1,415 words) - 10:52, 15 August 2024
  • Thumbnail for Sensitometry
    how the density of silver produced varied with the amount of light received, and the method and time of development. Plots of film density (log of opacity)...
    15 KB (1,925 words) - 07:36, 8 October 2024
  • Thumbnail for Mud logging
    drilling medium (most commonly drilling mud). Mud logging is usually performed by a third-party mud logging company. This provides well owners and producers...
    11 KB (1,528 words) - 16:24, 1 November 2023
  • Thumbnail for Normal distribution
    for a real-valued random variable. The general form of its probability density function is f ( x ) = 1 2 π σ 2 e − ( x − μ ) 2 2 σ 2 . {\displaystyle...
    150 KB (22,488 words) - 15:23, 12 October 2024
  • In additive number theory, the Schnirelmann density of a sequence of numbers is a way to measure how "dense" the sequence is. It is named after Russian...
    18 KB (2,575 words) - 07:16, 8 February 2024
  • Sound energy density or sound density is the sound energy per unit volume. The SI unit of sound energy density is the pascal (Pa), which is 1 kg⋅m−1⋅s−2...
    3 KB (393 words) - 20:41, 15 February 2023
  • formation that it is logging. The presence of hydrocarbons (e.g. oil, natural gas, condensate) will reduce the response on an SP log because the interstitial...
    5 KB (752 words) - 13:43, 21 July 2024