Core Spectral Gamma Logger
Non-Destructive Spectral Gamma Core AnalysisThe Core Spectral Gamma Logger provides rapid, non-destructive measurement of potassium (K), uranium (U), thorium (Th), and total count (TC) across whole core and core plug samples, enabling lithological characterization, mineralogy assessment, and core-to-log calibration in petrophysical workflows.
K · U · Th · TC
Spectral Elements
Non-Destructive
Measurement Type
Whole Core & Plugs
Sample Compatibility
256 Channels
Spectral Resolution
Spectral gamma logging of whole core
Core plug gamma measurement
K, U, Th elemental quantification
Total count (TC) gamma logging
Core-to-log depth calibration
Lithological classification
Mineral identification & mapping
Formation evaluation support
Spectral Gamma Detection
- High-resolution NaI(Tl) scintillation detector for precise spectral measurement
- Simultaneous acquisition of K (wt%), U (ppm), Th (ppm) and total count (TC in API units)
- Energy stabilization circuit ensures consistent spectral performance across varying temperatures
- Lead-lined detector housing for effective background suppression
- 256-channel spectral resolution for detailed elemental discrimination
Core Logging System
- Compatible with whole core boxes (up to 1 m core per pass) and individual core plugs
- Variable logging speed from 0.5 to 10 cm/s to balance speed and count statistics
- Automated motorised drive with depth encoder for precise positional tracking
- Continuous or step-mode logging for workflow flexibility
- Non-destructive — core samples are fully preserved for subsequent testing
Data Acquisition & Processing
- Real-time spectral display and elemental log output during acquisition
- Integrated spectral stripping and matrix correction algorithms
- Core-to-log depth-matching tools for wireline calibration
- Export to LAS, CSV, and standard petrophysical software formats
- Automated quality control and count rate monitoring
| Detector | |
| Detector type | NaI(Tl) scintillation |
| Spectral channels | 256 |
| Energy range | 100 keV – 3 MeV |
| Elements measured | K (wt%), U (ppm), Th (ppm), TC (API) |
| Sample Compatibility | |
| Whole core box | Up to 1 m per pass |
| Core plug diameter | Up to 4″ |
| Measurement type | Non-destructive |
| Logging Performance | |
| Logging speed | 0.5 – 10 cm/s |
| Depth resolution | Continuous / user-defined step |
| Depth encoder | Motorised, automated |
| Shielding & Environment | |
| Shielding material | Lead-lined housing |
| Operating temperature | 15 – 35°C |
| Power supply | 110 – 240V AC, 50/60 Hz |
Acquisition Software
- Real-time spectral display with live K, U, Th, and TC log tracks
- Adjustable energy window settings for custom elemental peaks
- Automated count-rate stabilization and detector gain correction
- Session-based logging with depth mark annotation
Processing & Export
- Spectral stripping and Compton scatter correction
- Matrix-dependent correction factors for accurate elemental concentrations
- Core-to-log depth correlation and shift tools
- Export to LAS 2.0, CSV, and ASCII formats for integration with petrophysical software
- Compatible with Petrel, IP, and other industry platforms via standard file exchange
Core Analysis Workflows
- Non-destructive whole core gamma logging prior to slabbing or plugging
- Core plug screening for representative sample selection
- Core-to-wireline log calibration and depth matching
- Quality control of coring operations and core recovery assessment
Petrophysical & Geological Studies
- Lithological and stratigraphic characterization of clastic and carbonate sequences
- Clay mineral identification using Th/K ratio analysis
- Organic-rich shale and unconventional reservoir evaluation (U enrichment)
- Carbonate vs. siliciclastic discrimination
- Formation evaluation and reservoir description
Research & Integration
- Integration with petrophysical SCAL workflows
- Support for multi-well core correlation studies
- Geochemical and mineralogical research applications
Radiation Safety
- Lead-lined detector enclosure provides effective radiation shielding
- System designed in compliance with applicable radiation safety regulations
- Interlocked access panels prevent inadvertent exposure during operation
- Dose rate indicators and radiation monitoring integrated into the system
Operational Safety
- Automated motor drive with controlled speed limits and emergency stop
- Sample holder interlocks prevent movement during measurement
- Electrical safety to IEC standards with earth leakage protection
- Clear operator guidelines provided in system documentation
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