Cargando…
Three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography
Tight gas sandstone samples are imaged at high resolution industrial X-ray computed tomography (ICT) systems to provide a three-dimensional quantitative characterization of the fracture geometries. Fracture networks are quantitatively analyzed using a combination of 2-D slice analysis and 3-D visual...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431860/ https://www.ncbi.nlm.nih.gov/pubmed/28500297 http://dx.doi.org/10.1038/s41598-017-01996-7 |
_version_ | 1783236521217753088 |
---|---|
author | Lai, Jin Wang, Guiwen Fan, Zhuoying Chen, Jing Qin, Ziqiang Xiao, Chengwen Wang, Shuchen Fan, Xuqiang |
author_facet | Lai, Jin Wang, Guiwen Fan, Zhuoying Chen, Jing Qin, Ziqiang Xiao, Chengwen Wang, Shuchen Fan, Xuqiang |
author_sort | Lai, Jin |
collection | PubMed |
description | Tight gas sandstone samples are imaged at high resolution industrial X-ray computed tomography (ICT) systems to provide a three-dimensional quantitative characterization of the fracture geometries. Fracture networks are quantitatively analyzed using a combination of 2-D slice analysis and 3-D visualization and counting. The core samples are firstly scanned to produce grayscale slices, and the corresponding fracture area, length, aperture and fracture porosity as well as fracture density were measured. Then the 2-D slices were stacked to create a complete 3-D image using volume-rendering software. The open fractures (vug) are colored cyan whereas the calcite-filled fractures (high density objects) are colored magenta. The surface area and volume of both open fractures and high density fractures are calculated by 3-D counting. Then the fracture porosity and fracture aperture are estimated by 3-D counting. The fracture porosity and aperture from ICT analysis performed at atmospheric pressure are higher than those calculated from image logs at reservoir conditions. At last, the fracture connectivity is determined through comparison of fracture parameters with permeability. Distribution of fracture density and fracture aperture determines the permeability and producibility of tight gas sandstones. ICT has the advantage of performing three dimensional fracture imaging in a non-destructive way. |
format | Online Article Text |
id | pubmed-5431860 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54318602017-05-16 Three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography Lai, Jin Wang, Guiwen Fan, Zhuoying Chen, Jing Qin, Ziqiang Xiao, Chengwen Wang, Shuchen Fan, Xuqiang Sci Rep Article Tight gas sandstone samples are imaged at high resolution industrial X-ray computed tomography (ICT) systems to provide a three-dimensional quantitative characterization of the fracture geometries. Fracture networks are quantitatively analyzed using a combination of 2-D slice analysis and 3-D visualization and counting. The core samples are firstly scanned to produce grayscale slices, and the corresponding fracture area, length, aperture and fracture porosity as well as fracture density were measured. Then the 2-D slices were stacked to create a complete 3-D image using volume-rendering software. The open fractures (vug) are colored cyan whereas the calcite-filled fractures (high density objects) are colored magenta. The surface area and volume of both open fractures and high density fractures are calculated by 3-D counting. Then the fracture porosity and fracture aperture are estimated by 3-D counting. The fracture porosity and aperture from ICT analysis performed at atmospheric pressure are higher than those calculated from image logs at reservoir conditions. At last, the fracture connectivity is determined through comparison of fracture parameters with permeability. Distribution of fracture density and fracture aperture determines the permeability and producibility of tight gas sandstones. ICT has the advantage of performing three dimensional fracture imaging in a non-destructive way. Nature Publishing Group UK 2017-05-12 /pmc/articles/PMC5431860/ /pubmed/28500297 http://dx.doi.org/10.1038/s41598-017-01996-7 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Lai, Jin Wang, Guiwen Fan, Zhuoying Chen, Jing Qin, Ziqiang Xiao, Chengwen Wang, Shuchen Fan, Xuqiang Three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography |
title | Three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography |
title_full | Three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography |
title_fullStr | Three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography |
title_full_unstemmed | Three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography |
title_short | Three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography |
title_sort | three-dimensional quantitative fracture analysis of tight gas sandstones using industrial computed tomography |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431860/ https://www.ncbi.nlm.nih.gov/pubmed/28500297 http://dx.doi.org/10.1038/s41598-017-01996-7 |
work_keys_str_mv | AT laijin threedimensionalquantitativefractureanalysisoftightgassandstonesusingindustrialcomputedtomography AT wangguiwen threedimensionalquantitativefractureanalysisoftightgassandstonesusingindustrialcomputedtomography AT fanzhuoying threedimensionalquantitativefractureanalysisoftightgassandstonesusingindustrialcomputedtomography AT chenjing threedimensionalquantitativefractureanalysisoftightgassandstonesusingindustrialcomputedtomography AT qinziqiang threedimensionalquantitativefractureanalysisoftightgassandstonesusingindustrialcomputedtomography AT xiaochengwen threedimensionalquantitativefractureanalysisoftightgassandstonesusingindustrialcomputedtomography AT wangshuchen threedimensionalquantitativefractureanalysisoftightgassandstonesusingindustrialcomputedtomography AT fanxuqiang threedimensionalquantitativefractureanalysisoftightgassandstonesusingindustrialcomputedtomography |