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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,
Density_logging
Detailed record of borehole contents
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
Well_logging
Measure of error in statistics
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
Negative log predictive density
Negative_log_predictive_density
Process of cutting, processing, and moving trees
or logging railroad Logging road Heli-logging Log driving Log scaler Lumberjack Lumberjack World Championship World Logging Championship Logging camp
Logging
log PLR – pig launcher/receiver PLS – position location system PLSV – pipelay support vessel PLT – production logging tool PLTQ – production logging tool
List of abbreviations in oil and gas exploration and production
List_of_abbreviations_in_oil_and_gas_exploration_and_production
Function related to statistics and probability theory
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
Likelihood_function
Well logging tool
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
Caliper_log
Production assessment of boreholes drilled for oil or gas
nuclear porosity logs and sonic logs. The two main nuclear porosity logs are the density log and the neutron log. Density logging tools contain a caesium-137
Formation_evaluation
Fraction of a rock filled with gas
estimate is based on the simultaneous use of neutron and density logs. Under normal logging conditions, the porosity estimates obtained from these tools
Gas_porosity
Logging while drilling (LWD) is a technique that allows log data to be acquired during drilling operations through tools placed in the bottom hole assembly
Logging_while_drilling
Concept in number theory
In number theory, natural density, also referred to as asymptotic density or arithmetic density, is a measure of how "large" a subset of the set of natural
Natural_density
Part of the porosity in which a given fluid can flow
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
Effective_porosity
Concept in number theory
whose first decimal digit is 1 has no natural density, but has Dirichlet density log(2)/log(10). Natural density This is attributed by J.-P. Serre to a private
Dirichlet_density
Probability distribution
moments as the log-normal distribution; see Related distributions below. The mode is the point of global maximum of the probability density function. In
Log-normal_distribution
Process of harvesting trees that are submerged under water
Underwater logging is the process of logging trees from underwater forests. When artificial reservoirs and dams are built, large areas of forest are often
Underwater_logging
Describes statistically the splitting of primes in a given Galois extension of Q
In mathematics, specifically in algebraic number theory, the Chebotarev density theorem, named after Nikolai Chebotarev, statistically describes the splitting
Chebotarev_density_theorem
Geophysical process
petrophysical analysis and well log calibration. The calibration process replaces unreliable and missing sonic and density measurements with synthesized
Seismic_inversion
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
Gamma_ray_logging
Signal-to-noise ratio of a modulated signal
spectral density), and that is why CNR estimation techniques are timely and important. In satellite communications, carrier-to-noise-density ratio (C/N0)
Carrier-to-noise_ratio
Three results related to the density of prime numbers
\ln(x)} or log e ( x ) {\displaystyle \log _{e}(x)} . In analytic number theory, Mertens' theorems are three 1874 results related to the density of prime
Mertens'_theorems
Engineered wood product
Medium-density fibreboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibre, often in a defibrator
Medium-density_fibreboard
Estimate of an unobservable underlying probability density function
In statistics, probability density estimation or simply density estimation is the construction of an estimate, based on observed data, of an unobservable
Density_estimation
Probability distribution
Penny, W. D. "KL-Divergences of Normal, Gamma, Dirichlet, and Wishart densities". "LogGammaDistribution—Wolfram Language Documentation". "ExpGammaDistribution—Wolfram
Gamma_distribution
Removing trees from damaged forest areas
Salvage logging is the practice of logging trees in forest areas that have been damaged by wildfire, flood, severe wind, disease, insect infestation, or
Salvage_logging
Alternate metric for population density
Population-weighted density is an alternate metric for the population density of a region that attempts to measure the density as experienced by the average
Population_weighted_density
of the well logging tools, and are removed from the borehole before any hydraulic fracturing takes place. Measurement of formation density is made using
Uses of radioactivity in oil and gas wells
Uses_of_radioactivity_in_oil_and_gas_wells
Forest that has developed over a long period of time without disturbance
and geographic variables. Logging in old-growth forests is a contentious issue in many parts of the world. Excessive logging reduces biodiversity, affecting
Old-growth_forest
Technology used in oil and gas wells
setting as well as production logging and reservoir production characterization such as production logging, noise logging, pulsed neutron, production fluid
Wireline_(cabling)
Creation of a detailed record of a borehole
drilling medium (most commonly drilling mud). Mud logging is usually performed by a third-party mud logging company. This provides well owners and producers
Mud_logging
Method of identifying layers of rock in a borehole
Resistivity logging is a method of well logging that works by characterizing the rock or sediment in a borehole by measuring its electrical resistivity
Resistivity_logging
Study of light-sensitive materials
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)
Sensitometry
States of matter for water as a solid
suppressing long-range density fluctuations and are, therefore, nearly hyperuniform. Classification analysis suggests that low and high density amorphous ices
Phases_of_ice
Process in molecular biology
using the nearest-neighbor model. The optical density (OD) is generated from equation: Optical density= Log (Intensity of incident light / Intensity of
Nucleic_acid_quantitation
Census-designated place in Alaska, United States
Whitestone Logging Camp had a population of 2. It is not to be confused with Whitestone, another CDP in Southeast Fairbanks Census Area. Whitestone Logging Camp
Whitestone Logging Camp, Alaska
Whitestone_Logging_Camp,_Alaska
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
Spontaneous_potential_logging
Sonic logging is a well logging tool that provides a formation’s interval transit time, designated as Δ t {\displaystyle {\Delta }t} , which is a measure
Sonic_logging
Concept in statistics mathematics
Kernel density estimation is a nonparametric technique for density estimation i.e., estimation of probability density functions, which is one of the fundamental
Multivariate kernel density estimation
Multivariate_kernel_density_estimation
Probability distribution
for a real-valued random variable. The general form of its probability density function is f ( x ) = 1 2 π σ 2 exp ( − ( x − μ ) 2 2 σ 2 ) . {\displaystyle
Normal_distribution
porosity Gas porosity John T. Dewan, "Open-Hole Nuclear Logging - State of the Art" - SPWLA Twenty-Seventh Annual Logging Symposium, June 9–13, 1986.
Formation evaluation neutron porosity
Formation_evaluation_neutron_porosity
Type of mathematical function
properties of log-concave distributions: If a density is log-concave, so is its cumulative distribution function (CDF). If a multivariate density is log-concave
Logarithmically concave function
Logarithmically_concave_function
wireline and cased-hole logging solutions but unique offerings in high-density wellbore tortuosity logging and cement bond logging. Support Services covers
Gyrodata
Number of people inhabiting a given urbanized area
density of urban areas: Population density - the number of human persons per unit area Median density - a density metric which measures the density at
Urban_density
Type of fiberboard (engineered wood product)
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
Hardboard
Mathematical function, inverse of an exponential function
formula: log b x = log 10 x log 10 b = log e x log e b . {\displaystyle \log _{b}x={\frac {\log _{10}x}{\log _{10}b}}={\frac {\log _{e}x}{\log _{e}b}}
Logarithm
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
Sound_energy_density
Analytical expression in statistics
positive definite matrix of second derivatives of the negative log joint target density at the mode θ = θ ^ {\displaystyle \theta ={\hat {\theta }}} .
Laplace's_approximation
Computational statistics technique
distribution in log space (e.g. log-probability or log-density) instead. That is, work with h ( x ) = log g ( x ) {\displaystyle h\left(x\right)=\log g\left(x\right)}
Rejection_sampling
Device in optics that reduces light intensity
In photography and optics, a neutral-density filter, or ND filter, is a filter that reduces or modifies the intensity of all wavelengths, or colors, of
Neutral-density_filter
Normalized signal-to-noise ratio measure
0 {\displaystyle E_{b}/N_{0}} (energy per bit to noise power spectral density ratio) is a normalized signal-to-noise ratio (SNR) measure, also known
Eb/N0
Most common thermoplastic polymer
polymers of ethylene, with various values of n. It can be low-density or high-density and many variations thereof. Its properties can be modified further
Polyethylene
Stand density index (SDI; also known as Reineke's Stand Density Index after its founder) is a measure of the stocking of a stand of trees based on the
Stand_density_index
American geophysicist (1918–2012)
30–50 years old. Cook observed drilling and logging practices and conceived an improved electric logging method based on thin-sheet current paths controlled
John_Call_Cook
Logarithm of ratio of incident to transmitted radiant power through a sample
Tunable Diode Laser Absorption Spectroscopy (TDLAS) Densitometry Neutral density filter Mathematical descriptions of opacity Lawrence, Eleanor. "A". Henderson's
Absorbance
In additive number theory, a way to measure how dense a sequence of numbers is
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 Soviet
Schnirelmann_density
second, unregulated artisanal and logging third, and road infrastructure development fourth. Both mining and logging create similar secondary deforestation
Deforestation in the Democratic Republic of the Congo
Deforestation_in_the_Democratic_Republic_of_the_Congo
Statistical distribution
also known as the log-uniform distribution, is a continuous probability distribution. It is characterised by its probability density function, within the
Reciprocal_distribution
instrumentation – Geophysical borehole instrumentation to determine rock density ('density logging') IEC 61880 Video systems (525/60) – Video and accompanied data
List_of_IEC_standards
Notion in information theory
In information theory, the limiting density of discrete points is an adjustment to the formula of Claude Shannon for differential entropy. It was formulated
Limiting density of discrete points
Limiting_density_of_discrete_points
Graphical representation of the distribution of numerical data
rough sense of the density of the underlying distribution of the data, and often for density estimation: estimating the probability density function of the
Histogram
Uniform distribution on an interval
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
Continuous uniform distribution
Continuous_uniform_distribution
Genus of Old World monkeys
riverine forests, and wooded grasslands; they are found more in higher-density logged forests than in other primary forests. Their ruminant-like digestive
Black-and-white_colobus
Continuous probability distribution
scale parameter proportional to the standard deviation. The probability density function is the partial derivative of the cumulative distribution function:
Logistic_distribution
Physics phenomenon
called the reduced density matrix of ρ on subsystem A. Colloquially, we "trace out" or "trace over" system B to obtain the reduced density matrix on A. For
Quantum_entanglement
Inequality applying to random variables
probability of any decoder as well as the lower bounds for minimax risks in density estimation. Let the discrete random variables X {\displaystyle X} and Y
Fano's_inequality
Mountainous region in eastern North America
lumber forced logging firms to seek out the virgin forests of Appalachia. The first major logging ventures in Appalachia transported logs using mule teams
Appalachia
Device measuring a ship's speed
of the water density and the water velocity as is shown in Equation 2. where vWater is the speed of the fluid flow. ρ is the fluid density. Equation 2
Pitometer_log
Logarithm of probabilities, useful for calculations
log(x+x\cdot y/x)\\={}&\log(x+x\cdot \exp(\log(y/x)))\\={}&\log(x\cdot (1+\exp(\log(y)-\log(x))))\\={}&\log(x)+\log(1+\exp(\log(y)-\log(x)))\\={}&x'+\log
Log_probability
Species of Old World monkey
hunting and logging pressures. Population densities were 2.5 individuals/km2 in logged areas whereas unlogged areas had a population density of 5 individuals/km2
Pig-tailed_langur
Species of legume
Siamese rosewood is on the rise, leading to illegal logging in Thailand. Sornsathapornkul noted that logging licences issued by Cambodia, Laos, and Vietnam
Dalbergia_cochinchinensis
Probability distribution
its quantile density, specifically: H ( γ ) = ∫ 0 1 log ( Q ′ ( p ; γ ) ) d p = log ( 4 π γ ) {\displaystyle H(\gamma )=\int _{0}^{1}\log \,(Q'(p;\gamma
Cauchy_distribution
Nuclear magnetic resonance (NMR) logging is a type of well logging that uses the NMR response of a formation to directly determine its porosity and permeability
Nuclear magnetic resonance logging
Nuclear_magnetic_resonance_logging
Principle in Bayesian statistics
reference measure or prior density m(x), typically by maximizing − ∫ p ( x ) log p ( x ) m ( x ) d x {\displaystyle -\int p(x)\,\log {\frac {p(x)}{m(x)}}\
Principle_of_maximum_entropy
Municipality in Agusan del Sur, Philippines
municipality then experienced rapid progress, due in part to facilitate the logging business in the area. Being a town since 1872, Talacogon remains the economic
Talacogon
Density-based data clustering algorithm
Density-based spatial clustering of applications with noise (DBSCAN) is a data clustering algorithm proposed by Martin Ester, Hans-Peter Kriegel, Jörg
DBSCAN
Ugandan scientist and academic administrator
more effective and humane approach to long-term management of logging is to reduce logging offtake and incidental damage caused by timber extraction. "Small
John_Massa_Kasenene
Species of large cat
1970s and 1980s, logging and poaching had occurred in the adjacent Mae Wong and Khlong Lan National Parks, where population density was much lower, estimated
Tiger
content than logs per cubic foot due to their density, which means they take up less storage space and release more heat per lb. than logs. The low moisture
Wood_briquette
Particular case of the generalized extreme value distribution
Laplace distribution). It is related to the Gompertz distribution: when its density is first reflected about the origin and then restricted to the positive
Gumbel_distribution
Step in the process of designing physical objects
on the right shows density and Young's modulus, in a linear scale. The second plot shows the same materials attributes in a log-log scale. Materials families
Material_selection
Logarithmic unit expressing the ratio of physical quantities
example, carrier-to-noise-density ratio C/N0 (in hertz), involving carrier power C (in W) and noise power spectral density N0 (in W/Hz). Expressed in
Decibel
Graph with almost the max amount of edges
with any density less than its upper density, and does not have arbitrarily large finite subgraphs with density greater than its upper density. Formally
Dense_graph
City in Wisconsin, United States
After the increase of logging and the founding of the Cushing Land Company, St. Croix Falls became incorporated in 1887. The logging industry became important
St._Croix_Falls,_Wisconsin
where selective logging has not taken place. A forest disturbed by selective logging is also significantly more vulnerable to fire. Logging in the Amazon
Deforestation_in_Brazil
Generalization of gamma distribution to multiple dimensions
The spectral density can be marginalized to yield the density of a single eigenvalue, by evaluating a Selberg integral. The spectral density can be integrated
Wishart_distribution
Email service provided by Google
measure for users to protect their accounts when logging in. Once 2-Step Verification (2SV) is enabled, logging in from a new device requires an additional
Gmail
as a probabilistic graphical model and thus methods from decoding low-density parity-check codes like belief propagation can be used. In the erasure
Sudoku_code
Species of primate
old growth rainforest is being altered by humans. Logging of primary forest trees and illegal logging deteriorate the Dian's tarsier habitat. Other commercial
Dian's_tarsier
Two-parameter family of continuous probability distributions
chi-squared distribution. The inverse gamma distribution's probability density function is defined over the support x > 0 {\displaystyle x>0} f ( x ;
Inverse-gamma_distribution
Path loss of radio transmitted through air or vacuum
waves due to these factors: Intensity ( I {\displaystyle I} ) – the power density of the radio waves decreases with the square of distance from the transmitting
Free-space_path_loss
Chemical data page
chemical data on propane. Propane is highly temperature dependent. The density of liquid and gaseous propane are given on the next image. Table data obtained
Propane_(data_page)
Theorem in extremal graph theory
infinity, the Turán density is the maximum possible limit of their edge densities. The Erdős–Stone theorem determines the Turán density for all graphs, showing
Erdős–Stone_theorem
Continuous probability distribution
Rammler (1933) to describe a particle size distribution. The probability density function of a Weibull random variable is f ( x ; λ , k ) = { k λ ( x λ
Weibull_distribution
Overview of the history and state of Thailand's forests
power to protect forests and illegal logging was pursued more heavily by villagers. During the height of illegal logging in Thailand it is estimated that
Deforestation_in_Thailand
Optical density of a sample measured at 600 nm
600, D600, o.d. 600, OD600) is an abbreviation indicating the optical density of a sample measured at a wavelength of 600 nm in 1 cm light path (unless
OD600
Statistical field
the centered log-ratio transformation as a linear isometry. Specifically, this results in the Aitchison distance between two densities in the same Bayes
Bayes_space
Probability distribution
case of the log-t distribution where the degrees of freedom parameter is equal to 1. The log-Cauchy distribution has the probability density function: f
Log-Cauchy_distribution
Grouping a set of objects by similarity
settings (including parameters such as the distance function to use, a density threshold or the number of expected clusters) depend on the individual
Cluster_analysis
Country in South America
rapid economic and demographic expansion. Extensive legal and illegal logging destroy forests the size of a small country per year, and with it a diverse
Brazil
Census-designated place in Washington, United States
the Woods", the town began in 1923 as a logging settlement and considered itself the "World's Largest Logging Town". Ryderwood became a retirement community
Ryderwood,_Washington
Study of physical and chemical properties of rocks
Well Log Analysts (SPWLA) is an organisation whose mission is to increase the awareness of petrophysics, formation evaluation, and well logging best practices
Petrophysics
DENSITY LOGGING
DENSITY LOGGING
Girl/Female
Indian
Another Name of Happness
Biblical
a bush; enmity
Girl/Female
Arabic
Entity; Strong Existence
Girl/Female
Hindu, Indian
People who Give
Boy/Male
Bengali, Christian, Gujarati, Hindu, Indian, Kannada, Malayalam, Punjabi, Sanskrit, Sikh, Tamil
Deity
Girl/Female
Biblical
A bush, enmity.
Girl/Female
Indian, Punjabi, Sikh
Deity
Girl/Female
Muslim
Identity
Biblical
a bush; enmity
Girl/Female
Indian
Identity
Girl/Female
Indian
Girl/Female
American, Australian
God is My Judge
Girl/Female
British, English, Greek, Jamaican
Deity
Girl/Female
Indian
Deity
Girl/Female
Tamil
Deity
Surname or Lastname
English (Somerset)
English (Somerset) : apparently a habitational name from an unidentified place. It is probably a variant of Denslow or possibly Denley, neither of which are of identified origin.
Boy/Male
Arabic, Gujarati, Hindu, Indian, Kannada, Muslim
Identity
Girl/Female
Biblical
A bush, enmity.
Boy/Male
Muslim
Identity
Boy/Male
Indian
Royal Boy
DENSITY LOGGING
DENSITY LOGGING
Female
French
Pet form of French Bernarde, BERNARDINE means "bold as a bear."
Boy/Male
Indian, Sanskrit
Writter of Mahabharatham
Girl/Female
Gujarati, Hindu, Indian
Worship
Female
English
Variant spelling of English Izzy, ISSY means "God is my oath."
Girl/Female
Hindu
Happiness, Joy, Cheerful
Girl/Female
Arthurian Legend
White flower.
Boy/Male
Hindu
Girl/Female
Indian
Name of a Raga
Boy/Male
Muslim/Islamic
Love Affection
Biblical
made of milk, or of fat; brother of the heart
DENSITY LOGGING
DENSITY LOGGING
DENSITY LOGGING
DENSITY LOGGING
DENSITY LOGGING
n.
The quality or state of being porous; -- opposed to density.
n.
Enmity.
n.
The collection of attributes which make up the nature of a god; divinity; godhead; as, the deity of the Supreme Being is seen in his works.
n.
A condition in which the circulation is retarded, and the entire mass of blood is less oxygenated than it normally is.
n.
Rarily; rareness; thinness, as of a fluid; as, the tenuity of the air; the tenuity of the blood.
n.
The quality of being dense, close, or thick; compactness; -- opposed to rarity.
n.
A degree of firmness, density, or spissitude.
n.
The quality of being dense; density.
n.
Poverty; indigence.
a.
Having equal density, as different regions of a medium; passing through points at which the density is equal; as, an isopycnic line or surface.
n.
Thickness; density; compactness.
n.
The quality or state of being tenuous; thinness, applied to a broad substance; slenderness, applied to anything that is long; as, the tenuity of a leaf; the tenuity of a hair.
n.
Depth of shade.
n.
The ratio of mass, or quantity of matter, to bulk or volume, esp. as compared with the mass and volume of a portion of some substance used as a standard.
n.
Grossness; coarseness; thickness; density.
pl.
of Identity
n.
The condition of being the same with something described or asserted, or of possessing a character claimed; as, to establish the identity of stolen goods.
n.
The quality or state of being venous.
n.
The quality or state of being tense, or strained to stiffness; tension; tenseness.
n.
Refinement; delicacy.