GB/T 39540-2020 in English

VALID

Fast determination of shale gas composition—Laser Raman spectroscopy

Issued on:2020-11-19
Implemented on:2021-06-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $120.00
$117.00

Standard No:	GB/T 39540-2020
Document status:	VALID
Title in English:	Fast determination of shale gas composition—Laser Raman spectroscopy
Title in Chinese:	页岩气组分快速分析激光拉曼光谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-11-19
Implemented on:	2021-06-01
ICS Classification:	75.060-Natural gas
Chinese Classification:	E24-Natural gas
Professional Classification:	GB-National Standard
Related Keywords:	shale gas composition laser raman laser raman gas analyzer shale gas fields a shale gas platform shale gas laser raman spectroscopy
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《GB/T 39540-2020页岩气组分快速分析激光拉曼光谱法》由TC244（全国天然气标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

Interpretation of the core content of the standard

This standard establishes the technical specifications for the determination of the main components of shale gas by laser Raman spectroscopy. Its innovation is reflected in:

Technical elements	GB/T 39540-2020 requirements	Comparison with traditional chromatography
Analysis speed	Real-time detection (response in seconds)	10-30 minutes/sample
Detection limit	0.01% mole fraction	0.001% mole fraction
Applicable components	CH₄/C₂H₆/CO₂, etc.	Full component analysis

Key instrument configuration requirements

The standard puts forward clear technical indicators for Laser Raman gas analyzer:

Laser: power ≥0.5W, annual fluctuation <±5%
Detection module: resolution ≤7cm^-1, thermal drift <0.1cm^-1/℃
Sampling system: filtration accuracy 0.1μm

Application case: On-site detection of shale gas fields

A shale gas platform in Sichuan uses the LRS-3000 laser analyzer to achieve continuous monitoring of CH₄ content (85-98%), with a data deviation of <1.2%, which is 20 times more efficient than traditional methods.

Calibration system construction

Standard three-level calibration system:

Zero calibration: Use 99.999% high-purity inert gas
Benchmark calibration: 5%CO₂/Ar and other binary mixed gases
Working calibration: Concentration matches the actual sample

Implementation suggestions

Operational precautions:

Risk points	Solutions
Laser power attenuation	Energy calibration before daily startup
Cross interference	Update the interference factor matrix regularly
Sample contamination	Replace the filter module every 50 tests

More samples: DL/T 368-2010 JGJ 94-2008 YD/T 3934-2021

Sample only — not a preview of GB/T 39540-2020

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