porosity logging
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Porosity — or void fraction is a measure of the void (i.e., empty ) spaces in a material, and is a fraction of the volume of voids over the total volume, between 0–1, or as a percentage between 0–100%. The term is used in multiple fields including… … Wikipedia
Logging while drilling — (LWD) is a technique of measuring geologic formation properties in real time while drilling an oil well.DescriptionLogging while drilling, along with measurement while drilling systems provide wellbore directional surveys, petrophysical well logs … Wikipedia
Well logging — Gamma ray logging Spontaneous potential logging Resistivity logging Density logging Sonic logging Caliper logging Mud logging LWD/MWD v · … Wikipedia
Gas porosity — Determining the true porosity of a gas filled formation has always been a problem. While gas is a hydrocarbon, similar to oil, the physical properties of the fluids are very different, making it very hard to correctly quantify the total amount of … Wikipedia
Mud logging — Mud log in process. Well logging Gamma ray logging Spontaneous potential logging Resistivity logging Density logging … Wikipedia
Effective porosity — The term effective porosity lacks a single or straightforward definition. Even some of the terms used in its mathematical description (“Vcl” and “Vsh”) have multiple definitions. However, it is most commonly considered to represent the porosity… … Wikipedia
Density logging — Well logging Gamma ray logging Spontaneous potential logging Resistivity logging Density logging Sonic logging Caliper logging Mud logging LWD/MWD v · … Wikipedia
Formation evaluation neutron porosity — In the field of formation evaluation, porosity is one of the key measurements to quantify an oil and gas reserves. Neutron porosity measurement employs neutron source to measure hydrogen index in a reservoir, which is directly related to porosity … Wikipedia
Sonic logging — shows a formation’s interval transit time, designated Dt . It is a measure of a formation’s capacity to transmit sound waves. Geologically, this capacity varies with lithology and rock textures, notably porosity.Quantitatively, the sonic log is… … Wikipedia
Crosshole sonic logging — (CSL) is a method to verify the structural integrity of drilled shafts and other concrete piles. The CSL method is considered to be more accurate than sonic echo testing in the determination of structural soundness of concrete within the drilled… … Wikipedia
Spontaneous potential logging — The spontaneous potential log, commonly called the self potential log or SP log, is a measurement taken by oil industry well loggers to characterise rock formation properties. The log works by measuring small electric potentials (measured in… … Wikipedia
