is designed for natural gamma-ray spectrum registration, capture gamma-rays spectrums and thermal neutrons flow density of a sealed fast-neutron radioactive source.
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Features and Advantages
• quality control of borehole annulus cementing;
• delineation of gas accumulation zones in interesting space and borehole annulus;
• cavity delineation in well bore zone of terrigenous gas reservoirs and their linear dimension estimation;
• formation lithology specification
The apparatus includes: downhole tool, interface unit, which provides data transmission according to logging cable, downhole tool power supply and connection with depth sensor, and also NOTEBOOK or on-board computer of logging station.
The apparatus can be exploited with any logging hoist and cable 6 km in length, which is capable to transmit spectrometric signal.
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The number of sondes: |
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NNKt |
2 |
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SNGK-Sh |
3 (6 spectrums according to 256 channels) |
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SGK1 |
(1 spectrums according to 256 channels) |
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Energy range of SGK gamma-quantum registration, MeV |
0.1-3.0 |
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Energy range of SNGK gamma-quantum registration of spectrums, MeV |
0.1-8.0 |
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Energy range of SNGK gamma-quantum registration of full small and big sonde spectrum low-energy field, MeV |
0.1-0.6 |
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Energy resolution of SGK and SNGK according to 137 Cs peak, % |
up to 15 |
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Maximum operating pressure, MPa |
80 |
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The range of operating temperatures, °C |
120 |
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Tool diameter, mm |
48 |
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Length of downhole tool upper module, mm |
1350 |
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Length of downhole tool lower module (without centralizers), mm |
up to 2550 |
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Weight of downhole tool upper module, kg |
up to 12 |
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Weight of downhole tool lower module (without centralizers), kg |
up to 22 |
