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Pore-Scale Modeling of Pore Structure Effects on P-Wave Scattering Attenuation in Dry Rocks
Underground rocks usually have complex pore system with a variety of pore types and a wide range of pore size. The effects of pore structure on elastic wave attenuation cannot be neglected. We investigated the pore structure effects on P-wave scattering attenuation in dry rocks by pore-scale modelin...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4427103/ https://www.ncbi.nlm.nih.gov/pubmed/25961729 http://dx.doi.org/10.1371/journal.pone.0126941 |
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author | Wang, Zizhen Wang, Ruihe Li, Tianyang Qiu, Hao Wang, Feifei |
author_facet | Wang, Zizhen Wang, Ruihe Li, Tianyang Qiu, Hao Wang, Feifei |
author_sort | Wang, Zizhen |
collection | PubMed |
description | Underground rocks usually have complex pore system with a variety of pore types and a wide range of pore size. The effects of pore structure on elastic wave attenuation cannot be neglected. We investigated the pore structure effects on P-wave scattering attenuation in dry rocks by pore-scale modeling based on the wave theory and the similarity principle. Our modeling results indicate that pore size, pore shape (such as aspect ratio), and pore density are important factors influencing P-wave scattering attenuation in porous rocks, and can explain the variation of scattering attenuation at the same porosity. From the perspective of scattering attenuation, porous rocks can safely suit to the long wavelength assumption when the ratio of wavelength to pore size is larger than 15. Under the long wavelength condition, the scattering attenuation coefficient increases as a power function as the pore density increases, and it increases exponentially with the increase in aspect ratio. For a certain porosity, rocks with smaller aspect ratio and/or larger pore size have stronger scattering attenuation. When the pore aspect ratio is larger than 0.5, the variation of scattering attenuation at the same porosity is dominantly caused by pore size and almost independent of the pore aspect ratio. These results lay a foundation for pore structure inversion from elastic wave responses in porous rocks. |
format | Online Article Text |
id | pubmed-4427103 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-44271032015-05-21 Pore-Scale Modeling of Pore Structure Effects on P-Wave Scattering Attenuation in Dry Rocks Wang, Zizhen Wang, Ruihe Li, Tianyang Qiu, Hao Wang, Feifei PLoS One Research Article Underground rocks usually have complex pore system with a variety of pore types and a wide range of pore size. The effects of pore structure on elastic wave attenuation cannot be neglected. We investigated the pore structure effects on P-wave scattering attenuation in dry rocks by pore-scale modeling based on the wave theory and the similarity principle. Our modeling results indicate that pore size, pore shape (such as aspect ratio), and pore density are important factors influencing P-wave scattering attenuation in porous rocks, and can explain the variation of scattering attenuation at the same porosity. From the perspective of scattering attenuation, porous rocks can safely suit to the long wavelength assumption when the ratio of wavelength to pore size is larger than 15. Under the long wavelength condition, the scattering attenuation coefficient increases as a power function as the pore density increases, and it increases exponentially with the increase in aspect ratio. For a certain porosity, rocks with smaller aspect ratio and/or larger pore size have stronger scattering attenuation. When the pore aspect ratio is larger than 0.5, the variation of scattering attenuation at the same porosity is dominantly caused by pore size and almost independent of the pore aspect ratio. These results lay a foundation for pore structure inversion from elastic wave responses in porous rocks. Public Library of Science 2015-05-11 /pmc/articles/PMC4427103/ /pubmed/25961729 http://dx.doi.org/10.1371/journal.pone.0126941 Text en © 2015 Wang et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Wang, Zizhen Wang, Ruihe Li, Tianyang Qiu, Hao Wang, Feifei Pore-Scale Modeling of Pore Structure Effects on P-Wave Scattering Attenuation in Dry Rocks |
title | Pore-Scale Modeling of Pore Structure Effects on P-Wave Scattering Attenuation in Dry Rocks |
title_full | Pore-Scale Modeling of Pore Structure Effects on P-Wave Scattering Attenuation in Dry Rocks |
title_fullStr | Pore-Scale Modeling of Pore Structure Effects on P-Wave Scattering Attenuation in Dry Rocks |
title_full_unstemmed | Pore-Scale Modeling of Pore Structure Effects on P-Wave Scattering Attenuation in Dry Rocks |
title_short | Pore-Scale Modeling of Pore Structure Effects on P-Wave Scattering Attenuation in Dry Rocks |
title_sort | pore-scale modeling of pore structure effects on p-wave scattering attenuation in dry rocks |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4427103/ https://www.ncbi.nlm.nih.gov/pubmed/25961729 http://dx.doi.org/10.1371/journal.pone.0126941 |
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