As indicators of the clay content and shale
in the formation rocks, unsealed by a well, many types of logging can be used,
in particular the spontaneous potential (SP), density, neutron, and gamma raylogging. Gamma ray tools record naturally occurring gamma rays in the
formations adjacent to the wellbore. This nuclear measurement indicates the
radioactive content of the formation rocks.
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| Hydrocarbon formation rocks |
Effective in any environment, gamma
ray tools are the standard devices that used for the correlation of logs in
cased and open holes. One of the most effective gamma ray log tools, based on
the measurements of the natural radioactivity of the formation rocks, was
proposed in 1980. Its readings are analysed from the point of view of
determining the nature and quantity of radioactive elements. The tool can be
considered as an improved indicator of clay content of the formation rocks.
This logging device detects the presence of Uranium U, Thorium Th and Potassium
K in rocks, and subjected to determine the volumes of these radioactive
minerals. Read more>>>>>>>
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