Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and Permeability
Fluid flow in rocks has a key role in many geological processes, such as in geothermal reservoirs and crustal deformation. Permeability is known to be dependent on porosity and flow path aperture, but direct quantification of pore structures is more difficult than direct estimation of permeability....
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8818293 |
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| author | Kazumasa Sueyoshi Tadashi Yokoyama Ikuo Katayama |
| author_facet | Kazumasa Sueyoshi Tadashi Yokoyama Ikuo Katayama |
| author_sort | Kazumasa Sueyoshi |
| collection | DOAJ |
| description | Fluid flow in rocks has a key role in many geological processes, such as in geothermal reservoirs and crustal deformation. Permeability is known to be dependent on porosity and flow path aperture, but direct quantification of pore structures is more difficult than direct estimation of permeability. The gas breakthrough method can be used to determine the radius of transport pores by using the gas pressure at which gas breaks through a water-saturated sample (ΔPbreak). In this study, we applied the gas breakthrough method under confining pressure to damaged granite, in order to evaluate the relationship between permeability and pore characteristics (i.e., porosity and transport flow path aperture) at pressures up to 30 MPa. The transport flow path aperture, permeability, and porosity of thermally cracked granite decrease with increasing confining pressure. We quantified the relationship between permeability and pore characteristics, which provides a better estimation of permeability by taking into account the fraction of hydraulically connected cracks. |
| format | Article |
| id | doaj-art-9601622b9f604011833494cd7178da7f |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-9601622b9f604011833494cd7178da7f2025-02-03T06:43:52ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88182938818293Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and PermeabilityKazumasa Sueyoshi0Tadashi Yokoyama1Ikuo Katayama2Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama, Higashi-Hiroshima, Hiroshima, JapanGraduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama, Higashi-Hiroshima, Hiroshima, JapanGraduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama, Higashi-Hiroshima, Hiroshima, JapanFluid flow in rocks has a key role in many geological processes, such as in geothermal reservoirs and crustal deformation. Permeability is known to be dependent on porosity and flow path aperture, but direct quantification of pore structures is more difficult than direct estimation of permeability. The gas breakthrough method can be used to determine the radius of transport pores by using the gas pressure at which gas breaks through a water-saturated sample (ΔPbreak). In this study, we applied the gas breakthrough method under confining pressure to damaged granite, in order to evaluate the relationship between permeability and pore characteristics (i.e., porosity and transport flow path aperture) at pressures up to 30 MPa. The transport flow path aperture, permeability, and porosity of thermally cracked granite decrease with increasing confining pressure. We quantified the relationship between permeability and pore characteristics, which provides a better estimation of permeability by taking into account the fraction of hydraulically connected cracks.http://dx.doi.org/10.1155/2020/8818293 |
| spellingShingle | Kazumasa Sueyoshi Tadashi Yokoyama Ikuo Katayama Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and Permeability Geofluids |
| title | Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and Permeability |
| title_full | Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and Permeability |
| title_fullStr | Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and Permeability |
| title_full_unstemmed | Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and Permeability |
| title_short | Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and Permeability |
| title_sort | experimental measurement of the transport flow path aperture in thermally cracked granite and the relationship between pore structure and permeability |
| url | http://dx.doi.org/10.1155/2020/8818293 |
| work_keys_str_mv | AT kazumasasueyoshi experimentalmeasurementofthetransportflowpathapertureinthermallycrackedgraniteandtherelationshipbetweenporestructureandpermeability AT tadashiyokoyama experimentalmeasurementofthetransportflowpathapertureinthermallycrackedgraniteandtherelationshipbetweenporestructureandpermeability AT ikuokatayama experimentalmeasurementofthetransportflowpathapertureinthermallycrackedgraniteandtherelationshipbetweenporestructureandpermeability |