GB/T 38531-2020 in English

VALID

Microbeam analysis—Computed tomography (CT) method for micro- and nano-pore structure analysis in tight rock samples

Issued on:2020-03-06
Implemented on:2021-02-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $280.00
$272.00

Standard No:	GB/T 38531-2020
Document status:	VALID
Title in English:	Microbeam analysis—Computed tomography (CT) method for micro- and nano-pore structure analysis in tight rock samples
Title in Chinese:	微束分析致密岩石微纳米级孔隙结构计算机层析成像（CT）分析方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-03-06
Implemented on:	2021-02-01
Professional Classification:	GB-National Standard
Related Keywords:	tight rock samples introduction analysis nano-pore structure analysis microbeam analysis computed tomography ct analysis shows multi-angle projection correction method pore identification threshold segmentation
Related Topics:	Porosity Analysis analysis Organic Structure Analysis Repeat analysis Infrared analysis of secondary structure Coating Composition Analysis gap calculation Total Component Analysis Nanobeam microfluidic analysis microbeam analysis Coating Composition Analysis Product Analysis Chromatography semi-microanalysis Rock Composition Analyzer tomography Chromatographic analysis method Repeat analysis dual beam analysis Petroleum Composition Analysis Petroleum Composition Analysis Thermal analysis after structural analysis Case Analysis Microcomponent Analysis Chromatographic analysis method Porosity Analysis Thermal Structural Analysis Nano Analysis System gb analysis Thermal-Structural Analysis Structural Thermal Analysis Phase Analysis Structural Analysis Chromatographic Analysis Calculation Method cd secondary structure analysis nanogram analysis flow imaging analysis Analytical Balance Micrograms Microcomponent Analysis gb analysis Structural Analysis Test Methods nanogram analysis Structure Analyzer nanobeam analysis Structural Analysis Test Methods Analysis+ Analytic Hierarchy Process Image Analyzer Method Pore analysis How to perform phase analysis and structural analysis How to perform phase analysis and structural analysis Structural Analysis of Organic Materials Structural Analysis Phase Analysis Inorganic Material Composition Analysis Phase Analysis and Structural Analysis Porosity calculation Advantages of Chromatography Computational Visual Analytics Chromatographic system approach analytical chromatography Structural analysis from nanocomputer flow structure analysis Tertiary structure analysis Mesopore Analysis Organic Component Analysis microbeam micro column structural imaging Peak and quantity analysis and calculation Mechano-Synthesis Analysis 5 Methods of Structural Analysis Structural Modern Analysis Methods Pore analysis Lethality analysis Analytical method Duplicate well Nanobit Analyzer Pore Analysis Micropore Analysis Differential Hot Pressure Analysis Pore analysis system analysis- Nanotube Composition Analysis Product Structure Analysis Method Image Analyzer Method Nanotube Composition Analysis Porosity analysis method The basic structure of the analytical engine nanocomputer / analysis differential analysis technique Coal and Rock Porosity Calculations GBT38531 GB/T 38531-2020 Calculate the density of face-centered cube electrical capacitance tomography chromatographic classification method Micropore porosity calculation method How to calculate the resolution of liquid phase analysis method Microplastic Analysis Methods Thin layer analysis method of different types of components In vivo imaging analysis methods Pore structure modeling method Chromatin structure analysis methods Progress in standardization of microbeam analysis Microscopic pore structure experimental specifications and Primer secondary structure analysis method Chromatography column efficiency calculation method What are the pore analysis methods? Research methods of pore structure Nanoparticle structure analysis methods Analysis of major and trace elements in rocks Lithium micro-area composition analysis method

《GB/T 38531-2020微束分析致密岩石微纳米级孔隙结构计算机层析成像（CT）分析方法》由TC38（全国微束分析标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

Analysis of the core content of the standard

Technical elements	Key indicators	Innovation points
Resolution requirements	Pixel size <0.5μm	Achieve visualization of 50nm-level pores
Scanning control	Penetration rate 25%-40%	Dynamic adjustment of X-ray parameters
Data processing	Non-local mean filtering	Increase grayscale contrast by 10%+

Pore parameter calculation system

The standard defines three core parameters: porosity (P), shape factor (G), and connectivity (P_c):

Porosity calculation formula: P=V_P/V_S×100%

Shape factor formula: G=A²/P

Connectivity formula: P_c=V_P-Connected/V_P-Total×100%

Technical implementation points

X-ray CT scanner must meet the calibration requirements of GB/T 29070

Specimen preparation diameter and resolution matching principle

Artifact elimination adopts multi-angle projection correction method

Pore identification threshold segmentation allows ±10% error

Industry application case

Taking the tight sandstone in Ordos Basin as an example, CT analysis shows:

Pore type Diameter range (μm) Connectivity

Intergranular pores 0.1-5 62.3%

Dissolution pores 5-20 41.7%

More samples: JC/T 2453-2018 YD/T 3934-2021 JJG 21-2008

Sample only — not a preview of GB/T 38531-2020

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