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GB/T 38531-2020: Microbeam analysis - Computed tomography (CT) method for micro-and nano-pore structure analysis in tight rock samples
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Microbeam analysis - Computed tomography (CT) method for micro-and nano-pore structure analysis in tight rock samples
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GB/T 38531-2020
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Basic data | Standard ID | GB/T 38531-2020 (GB/T38531-2020) | | Description (Translated English) | Microbeam analysis - Computed tomography (CT) method for micro-and nano-pore structure analysis in tight rock samples | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G04 | | Classification of International Standard | 71.040.40 | | Word Count Estimation | 18,135 | | Date of Issue | 2020-03-06 | | Date of Implementation | 2021-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38531-2020: Microbeam analysis - Computed tomography (CT) method for micro-and nano-pore structure analysis in tight rock samples
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Microbeam analysis--Computed tomography (CT) method for micro-and nano-pore structure analysis in tight rock samples
ICS 71.040.40
G04
National Standards of People's Republic of China
Microbeam analysis of micro- and nano-scale pore structures in dense rocks
Computer tomography (CT) analysis method
2020-03-06 release
2021-02-01 implementation
State Administration of Market Supervision
Published by the National Standardization Administration
Contents
Foreword I
Introduction Ⅱ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Method Overview 3
5 Equipment, equipment and test conditions 3
6 Test Step 4
7 Data processing 5
8 Analysis Report 6
Appendix A (informative) Example of computer tomography analysis report format for micro-nano-scale pore structure of dense rocks 8
Appendix B (informative) Uncertainty influencing factors and comparison results of typical samples from multiple laboratories 12
References 15
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed and managed by the National Microbeam Analysis Standardization Technical Committee (SAC/TC38).
This standard was drafted. China National Petroleum Corporation Exploration and Development Research Institute, China Petroleum and Chemical Corporation victory
Oilfield Branch Exploration and Development Research Institute, PetroChina Hangzhou Geological Research Institute, China Petroleum & Chemical Corporation
Division of Petroleum Exploration and Development Research Institute Wuxi Institute of Petroleum Geology, China University of Petroleum (East China), Digital Rock Technology (Xiamen) Co., Ltd.
The main drafters of this standard. Wu Songtao, Wang Xiaoqi, Zhu Rukai, Bao Youshu, Xue Huaqing, Zhang Wentao, Jin Xu, Cui Jingwei, Zhou Shangwen, Chen Wei,
Yang Yongfei and Zhao Tianpeng.
Introduction
Tight rocks are an important area for unconventional oil and gas exploration worldwide. Tight rocks contain rich fossil energy, with great potential, but pore structure
Complex and difficult to characterize. Computer tomography (CT) has become an important method for evaluating the effectiveness of tight rocks.
Structure and quantitative results have become the key parameters for the evaluation of tight rock reservoir performance. To meet the needs of the development of unconventional reservoir evaluation test technology in China
It is necessary to formulate this standard to regulate the application of computer tomography in the evaluation of micro-nano-level pore structure of dense rocks.
Microbeam analysis of micro- and nano-scale pore structures in dense rocks
Computer tomography (CT) analysis method
1 Scope
This standard specifies the terms and definitions and analysis of computer tomography (CT) technology for imaging of micro-nano-scale pore structures in dense rocks.
Methods, technical requirements, data processing, analysis report content and uncertainty analysis.
This standard is applicable to micro-nano-level CT analysis of rocks such as mud shale, dense carbonate rock, tight sandstone, coal rock, and other geological samples.
Can refer to implementation.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB 17589 Specifications for Quality Assurance Testing of X-ray Computed Tomography Equipment
GB/T 27025 General requirements for the competence of testing and calibration laboratories
GB/T 29034 Guidelines for non-destructive testing industrial computer tomography (CT)
GB/T 29070 General requirements for non-destructive testing industrial computer tomography (CT) testing
3 terms and definitions
The following terms and definitions apply to this document.
3.1
X-raypenetrationrate
After the sample is absorbed, the ratio of the X-ray intensity to the light intensity without the sample absorption.
3.2
Pixelresolution
The actual size on the specimen represented by a single pixel.
3.3
Artifact
In the reconstructed sample image, the characteristics of non-samples that appear non-randomly.
Note. Including ring artifacts and linear artifacts.
3.4
Pore
Space in rocks that is not filled with solid matter.
Note. Including caves and cracks.
3.5
Porosity
The ratio of the total volume of pores in the sample to the total volume of the sample. The calculation is shown in equation (1).
P = VP/VS × 100% (1)
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