Neutron Spectroscopy Environmental Correction
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Solution Overview
Problem
In neutron-induced gamma-ray spectroscopy for elemental analysis in bulk media, the hydrogen content affects the gamma-ray spectrum, leading to inaccurate elemental concentration measurements if environmental dependencies are not accounted for.
Innovation Solution
A method and system that utilize baseline and difference standard spectra to adjust yield coefficients, accounting for environmental conditions such as porosity, to accurately determine elemental concentrations by processing gamma-ray spectra from inelastic neutron interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard gamma-ray spectra are used for elemental analysis without accounting for environmental conditions, then the analysis process is simple, but the measurement precision of elemental concentrations deteriorates due to hydrogen content effects
Solution Approach 1:
The patent pre-calculates and stores environmental dependence coefficients for various elements and environmental conditions before actual measurement. When analyzing a sample, the system only needs to retrieve these pre-computed coefficients and apply them to the measured spectrum, rather than performing complex environmental corrections during measurement. This resolves the contradiction by preparing correction data in advance, maintaining measurement simplicity while improving accuracy.
Solution Approach 2:
The patent transforms the complex spectral analysis problem into a parameter-based correction approach. Instead of performing full spectral simulations accounting for hydrogen content and other environmental factors, the system uses pre-determined correction parameters (environmental dependence coefficients) that quantify how spectra change with environmental conditions. This parameterization simplifies the analysis while capturing environmental effects, resolving the contradiction between accuracy and complexity.
2Measurement precision
If environmental dependence is accounted for in spectral analysis, then measurement precision improves, but the device complexity increases due to additional correction calculations
Solution Approach 1:
The system pre-computes environmental dependence coefficients for various elements across ranges of environmental parameters (hydrogen content, porosity, etc.) and stores them in lookup tables. During actual measurement, the system retrieves the appropriate coefficients based on measured environmental conditions and applies simple corrections to the spectrum. This eliminates the need for complex real-time calculations, resolving the contradiction between accuracy and computational complexity.
Solution Approach 2:
The patent creates simplified representations (copies) of the complex environmental effects through pre-computed correction coefficients. Instead of performing full physical simulations of neutron-gamma interactions under various environmental conditions, the system uses tabulated correction factors that replicate the effects of environmental variations. This copying approach maintains measurement accuracy while dramatically reducing computational requirements.
3Measurement precision
If baseline standard spectra are adjusted using difference standard spectra for environmental corrections, then measurement accuracy improves, but the ease of operation deteriorates due to additional spectral processing steps
Solution Approach 1:
The system pre-processes environmental correction data by calculating difference standard spectra and deriving environmental dependence coefficients before actual sample analysis. The correction methodology is established in advance, and during operation, the system automatically selects and applies the appropriate corrections based on measured environmental conditions. This preliminary preparation resolves the contradiction by automating the correction process, improving accuracy without burdening the operator with complex manual adjustments.
Solution Approach 2:
The spectral analysis system performs self-correction by automatically detecting environmental conditions and applying appropriate environmental dependence coefficients to the measured spectra. The system independently determines the necessary corrections without requiring manual intervention or complex operator decisions. This self-service capability improves measurement accuracy while maintaining operational simplicity, as the automation handles the complexity internally.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables accurate determination of elemental concentrations by accounting for environmental variations, improving the precision of elemental analysis in bulk media, particularly in downhole geological formations.
Implementation Method 1
neutrons are emitted into the bulk media to produce inelastic neutron interaction in the bulk media, and a gamma-ray spectrum resulting from the inelastic neutron interaction
Implementation Method 2
a gamma-ray spectrum resulting from the inelastic neutron interaction in the bulk media is detected
Data Source
AI summary
A method and system for analyzing constituent elements in bulk media wherein neutrons are emitted into the bulk media to produce inelastic neutron interaction in the bulk media, and a gamma-ray spectrum resulting from the inelastic neutron interaction in the bulk media is detected. A set of standard spectra are used as part of spectral analysis that processes the standard spectra and the derived gamma-ray spectrum to determine a number of yield coefficients for the constituent elements as part of the bulk media. The standard spectra or the spectral analysis is configured to account for at least one environmental condition that affects detected gamma-rays that result from the inelastic neutron interaction in the bulk media.