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Neutron Tool - Single Point
 Download .PDF Brochure
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Parameters Logged:
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Natural Gamma
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Scintillation Crystal 22 mm x 102 mm
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0 - 10,000 API units
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Neutron-Neutron
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He³ Detector 25.4mm x 152mm
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0 - 2,000 API units
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Deviation and Resistivity are available on some tools
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The neutron tool is primarily used to determine porosity and water content. Fast neutrons emitted by a source on board the tool (Americium-241/Beryllium) are slowed by predominantly hydrogen atoms and become slow neutrons (thermal neutrons). The measure of thermal neutrons at the detector in the tool thus gives an indication of hydrogen present in the formation, usually in the form of water or hydrocarbons. A calibrated neutron log will thus provide information as to the quantity of hydrogen present in the rock matrix and from this information, porosity can be determined using units based upon a sandstone, limestone or dolomite matrix.
Applications:
The tool can be used in steel casing/drill rods or in the open hole. Reliable porosities can only be achieved in the open hole.
The most common applications are:
- Location of aquifer and aquitard
- Porosity determination
- Lithology
- Moisture content
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Specifications:
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Diameter
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42 mm (1.654 in)
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Length
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2,430 mm (7.97 ft)
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Max. Pressure
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276 bar (4,003 psi)
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Example Log Image:
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