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- 奈良 禎太
- 京都大学大学院工学研究科
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- 中林 亮
- 北海道大学大学院工学研究院
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- 米田 哲朗
- 北海道大学大学院工学研究院
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- 金子 勝比古
- 北海道大学大学院工学研究院
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- Philip George MEREDITH
- Department of Earth Sciences, University College London
書誌事項
- タイトル別名
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- Permeability and Elastic Wave Velocities in Sandstone under Hydrostatic Pressure
- セイスイ アッカ ニ オケル サガン ノ トウスイセイ オヨビ ダンセイハ ソクド
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抄録
It is essential to investigate the influence of pores and fractures on physical and transport properties of rocks for understanding many key problems in seismology, volcanology and rock engineering. In rocks, water is primarily stored in and migrates through networks of pores and fractures at all scales. It is therefore important to know how fluid flow in such pores and fracture networks responds to the elevated pressures found at depth. Here, we report results from an investigation of changes in fluid permeability, and associated changes in P-wave and S-wave velocities, at elevated effective pressure for both intact and macro-fractured sandstone samples. Specifically, we used two types of sandstone; Clashach sandstone from Scotland and Shirahama sandstone from Japan, which have different porosities and pore size distributions. Wave velocities increased with increasing pressure for all cases. Additionally, wave velocities in macro-fractured samples were lower than those in intact samples. For Shirahama sandstone, permeability decreased with increasing pressure. By contrast, permeability of Clashach sandstone remained essentially constant over the whole pressure range. This lack of change is interpreted as being due to the presence of a well-connected network of large pores with high aspect ratios. It was also found that the difference in permeability between intact and macro-fractured sandstone samples was small. From these results, it is concluded that the networks of pores control the permeability in sandstone.
収録刊行物
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- 材料
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材料 61 (3), 214-221, 2012
公益社団法人 日本材料学会
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詳細情報 詳細情報について
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- CRID
- 1390282680420956160
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- NII論文ID
- 130002085015
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- NII書誌ID
- AN00096175
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- COI
- 1:CAS:528:DC%2BC38XmtlWqur4%3D
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 023598235
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
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- KAKEN
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- 抄録ライセンスフラグ
- 使用不可