Titlebook: Well Logging for Earth Scientists; Darwin V. Ellis,Julian M. Singer Textbook 2007Latest edition Springer Science+Business Media B.V. 2007

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Basic Nuclear Physics for Logging Applications: Gamma Rays, obtain information about the predominant constituent of formations, the rock matrix. Nuclear measurements used in logging respond to properties of both the formation and the contained fluids. These measurements employ gamma rays and neutrons. These two types of penetrating radiation are the only on

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Gamma Ray Devices,e measurements, the SP (see Chapter 3), has been analyzed in some detail, and it is known to have a marked response to clean permeable zones. This is evident in the right track of Fig. 11.1 where the more negative potential of the zone between 8,510 and 8,540 ft is due to the simultaneous absence of

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Basic Neutron Physics for Logging Applications,ial application was to determine formation porosity. Currently, in addition to logging tools that detect neutrons in order to determine formation hydrogen content, there are tools which use pulsed neutrons to analyze the absorption rate of the emitted neutrons, and gamma ray spectroscopy tools which

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Neutron Porosity Devices,is based on the fact that hydrogen, with its relatively large scattering cross section and small mass, is very efficient in the slowing-down of fast neutrons. A measurement of the spatial distribution of epithermal neutrons resulting from the interaction of high-energy source neutrons with a formati

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