NB/T 11287-2023 in English
VALIDFluorescence spectrum analysis methods for shale organic macerals
- Issued on:2023-05-26
- Implemented on:2023-11-26
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
本文件规定了激光拉曼光谱法和显微分光光度计法泥页岩有机显微组分荧光检测环境、测试方法及质量要求。
本文件适用于泥页岩有机显微组分激光拉曼光谱法和显微分光光度计法荧光光谱测试。
Introduction
Analysis of the core content of the standard
This standard systematically regulates for the first time the application of laser Raman spectrometer and microspectrophotometer in the fluorescence detection of organic microscopic components in shale, focusing on solving the following technical problems:
| Technical dimensions | Laser Raman method | Microspectrophotometer method |
|---|---|---|
| Applicable components | Homogeneous group/exinite group/inertin group/sapropel group | Sapropel group/exinite group/hydrogen-rich secondary component |
| Detection wavelength | 620-630nm | 330-900nm |
| Key parameters | Fluorescence intensity variation ratio (F400/F0) | Red-green quotient/yellow-green quotient |
Key points of technical implementation
1. Key control of laser Raman method
- Laser parameters: Strictly use 488nm wavelength, spot diameter ≤2μm
- Anti-photobleaching: Single point scanning time 1.00s, interval 0.3s, total number of times ≥145 times
- Data quality: The absolute error of the variation ratio between the initial fluorescence intensity F0 at 625nm and the intensity F400 after 400s is required to be ≤0.05 (when the ratio is 0.5-1)
2. Innovation of microspectrophotometer method
Component identification is achieved through a multi-module excitation system (ultraviolet/purple/blue/green):
- Characteristic peak of cutin: 540-552nm (green module)
- Red shift of asphaltene: main peak displacement>20nm
- Rapid quenching of spores: yellow-green quotient decrease rate>0.15/min
Application value of the standard
This standard provides two major technical supports for shale oil exploration:
| Application scenarios | Technical indicators | Geological significance |
|---|---|---|
| Source rock evaluation | Sapropel group F400/F0>1.2 | Indicates high-quality source rock |
| Maturity determination | Red-green quotient<0.6 and yellow-green quotient>1.5 | Identification of oil generation window stage |
Implementation suggestions
- Laboratory configuration:It needs to be equipped with an anti-vibration table and a temperature and humidity control system (24±2℃/RH<45%)
- Sample preparation: Prepare the optical slice strictly according to SY/T 5124, and dry for 4 hours after curing
- Data cross-validation: It is recommended to carry out vitrinite reflectance (Ro) test at the same time

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