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Updated: Jun 10, 2026
14:11
Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
Published on: March 29, 2016
Porosity calculations using a C/O logging tool with boron-lined NaI detectors
1Global Nuclear Fuel (GNF) 3901 Castle Hayne Road, M/C A-55 Wilmington, NC 28401, USA. Walid.Metwally@GNF.com
Summary
This study introduces a combined carbon/oxygen and thermal neutron porosity logging tool, enhancing low porosity detection. The boron lining effectively reduces neutron flux and detector activation in oil well logging applications.
Area of Science:
- Nuclear geophysics
- Well logging technology
Background:
- Carbon/Oxygen (C/O) and thermal neutron porosity (TNP) tools are essential for oil well logging.
- Integrating these tools can improve efficiency and data acquisition.
Purpose of the Study:
- To investigate the feasibility of combining C/O and TNP tools into a single logging instrument.
- To evaluate the performance of a combined tool incorporating a boron lining with a NaI detector assembly.
Main Methods:
- Utilized the Monte Carlo N-particle (MCNP) transport code for detailed modeling and simulation.
- Designed a NaI detector assembly with an added boron lining for the combined tool.
Main Results:
- The simulation demonstrated good porosity sensitivity, particularly for low porosity values.
- A significant reduction in neutron flux incident on detectors was observed.
- Detector activation by thermal neutrons was effectively reduced.
Conclusions:
- The proposed combined C/O and TNP tool with a boron lining is a viable solution for oil well logging.
- The design shows promise for accurate low porosity measurements and reduced detector activation.
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