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Compensated Neutron Tool
 Download .PDF Brochure
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Parameters Logged:
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Natural Gamma (1)
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2.2 x 10.1 cm (0.875 x 4.0 in.)
NaI Scintillation
Offset: 30.5 cm (12 in.)
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0-10,000 API units
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Deep Guard Resistivity (2)
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Upper guard, measure and lower guard electrodes, 3 m (10 ft.)
Offset for measure electrode:152.4 cm (60 in.)
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0 to 20,000 CPS
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Neutron Detector, Far Spacing (3)
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He3 3.8 x 24.4 cm (1.5 x 9.6 in.)
64.3 cm (25.3 in.) spacing
Offset: 209.8 cm (82.6 in.)
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0 to 5,000 CPS
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Neutron Detector, Near Spacing (4)
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He3 3.8 x 10.1 cm (1.5 x 4.0 in.)
25.4 cm (10.0 in.) spacing
Offset: 246.4 cm (97 in.)
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-10 to 100% porosity
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Radioactive Source (5)
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5 Ci AmBe 241 neutron source, bullplug
Offset: 289.5 cm (114 in.)
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0 to 40,000 ohm meters
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The Compensated Neutron tool contains a two detector, neutron system which uses a 5.0 Curie, Am241Be source to record neutron porosity of the formation. Additionally, the tool also records short and long neutron counts, natural gamma and a deep guard resistivity.
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Specifications:
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Diameter
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5.08 cm (2.0 in.)
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Length
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283.5 cm (111.6 in.)
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Max. Pressure
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232 kg/cc (3300 PSI)
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Weight
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25 kg (55 lb.)
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Max. Temperature
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85 C (185 F)
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Logging Speed
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9 m/min. (30 ft./min.)
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Tool Voltage
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70 VDC
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Example Log Image:
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