Sample Size Effects on Petrophysical Characterization and Fluid-to-Pore Accessibility of Natural Rocks
Laboratory-scale analysis of natural rocks provides petrophysical properties such as density, porosity, pore diameter/pore-throat diameter distribution, and fluid accessibility, in addition to the size and shape of framework grains and their contact relationship with the rock matrix. Different types...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/10/1651 |
| _version_ | 1797598879536906240 |
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| author | Qiming Wang Qinhong Hu Chen Zhao Yang Wang Tao Zhang Jan Ilavsky Mengdi Sun Linhao Zhang Yi Shu |
| author_facet | Qiming Wang Qinhong Hu Chen Zhao Yang Wang Tao Zhang Jan Ilavsky Mengdi Sun Linhao Zhang Yi Shu |
| author_sort | Qiming Wang |
| collection | DOAJ |
| description | Laboratory-scale analysis of natural rocks provides petrophysical properties such as density, porosity, pore diameter/pore-throat diameter distribution, and fluid accessibility, in addition to the size and shape of framework grains and their contact relationship with the rock matrix. Different types of laboratory approaches for petrophysical characterization involve the use of a range of sample sizes. While the sample sizes selected should aim to be representative of the rock body, there are inherent limitations imposed by the analytical principles and holding capacities of the different experimental apparatuses, with many instruments only able to accept samples at the μm–mm scale. Therefore, a total of nine (three limestones, three shales, two sandstones, and one dolomite) samples were collected from Texas to fill the knowledge gap of the sample size effect on the resultant petrophysical characteristics. The sample sizes ranged from 3 cm cubes to <75 μm particles. Using a combination of petrographic microscopy, helium expansion pycnometry, water immersion porosimetry, mercury intrusion porosimetry, and (ultra-) small-angle X-ray scattering, the impact of sample size on the petrophysical properties of these samples was systematically investigated here. The results suggest that the sample size effect is influenced by both pore structure changes during crushing and sample size-dependent fluid-to-pore connectivity. |
| first_indexed | 2024-03-11T03:26:49Z |
| format | Article |
| id | doaj.art-d7ba7d81fa864f139252825c7c1604db |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T03:26:49Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-d7ba7d81fa864f139252825c7c1604db2023-11-18T02:42:46ZengMDPI AGNanomaterials2079-49912023-05-011310165110.3390/nano13101651Sample Size Effects on Petrophysical Characterization and Fluid-to-Pore Accessibility of Natural RocksQiming Wang0Qinhong Hu1Chen Zhao2Yang Wang3Tao Zhang4Jan Ilavsky5Mengdi Sun6Linhao Zhang7Yi Shu8Shandong Provincial Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, ChinaShandong Provincial Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, ChinaShandong Provincial Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, ChinaSchool of Earth Science and Resources, Chang’an University, Xi’an 710054, ChinaDepartment of Earth and Environmental Sciences, The University of Texas at Arlington, Arlington, TX 76019, USAX-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USAKey Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing 163318, ChinaKey Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, ChinaPetroleum Exploration and Development, Jianghan Oilfield Branch Company, Sinopec, Wuhan 430223, ChinaLaboratory-scale analysis of natural rocks provides petrophysical properties such as density, porosity, pore diameter/pore-throat diameter distribution, and fluid accessibility, in addition to the size and shape of framework grains and their contact relationship with the rock matrix. Different types of laboratory approaches for petrophysical characterization involve the use of a range of sample sizes. While the sample sizes selected should aim to be representative of the rock body, there are inherent limitations imposed by the analytical principles and holding capacities of the different experimental apparatuses, with many instruments only able to accept samples at the μm–mm scale. Therefore, a total of nine (three limestones, three shales, two sandstones, and one dolomite) samples were collected from Texas to fill the knowledge gap of the sample size effect on the resultant petrophysical characteristics. The sample sizes ranged from 3 cm cubes to <75 μm particles. Using a combination of petrographic microscopy, helium expansion pycnometry, water immersion porosimetry, mercury intrusion porosimetry, and (ultra-) small-angle X-ray scattering, the impact of sample size on the petrophysical properties of these samples was systematically investigated here. The results suggest that the sample size effect is influenced by both pore structure changes during crushing and sample size-dependent fluid-to-pore connectivity.https://www.mdpi.com/2079-4991/13/10/1651particle size effectpetrophysical propertiesmercury intrusion porosimetryX-ray scatteringparticle density |
| spellingShingle | Qiming Wang Qinhong Hu Chen Zhao Yang Wang Tao Zhang Jan Ilavsky Mengdi Sun Linhao Zhang Yi Shu Sample Size Effects on Petrophysical Characterization and Fluid-to-Pore Accessibility of Natural Rocks Nanomaterials particle size effect petrophysical properties mercury intrusion porosimetry X-ray scattering particle density |
| title | Sample Size Effects on Petrophysical Characterization and Fluid-to-Pore Accessibility of Natural Rocks |
| title_full | Sample Size Effects on Petrophysical Characterization and Fluid-to-Pore Accessibility of Natural Rocks |
| title_fullStr | Sample Size Effects on Petrophysical Characterization and Fluid-to-Pore Accessibility of Natural Rocks |
| title_full_unstemmed | Sample Size Effects on Petrophysical Characterization and Fluid-to-Pore Accessibility of Natural Rocks |
| title_short | Sample Size Effects on Petrophysical Characterization and Fluid-to-Pore Accessibility of Natural Rocks |
| title_sort | sample size effects on petrophysical characterization and fluid to pore accessibility of natural rocks |
| topic | particle size effect petrophysical properties mercury intrusion porosimetry X-ray scattering particle density |
| url | https://www.mdpi.com/2079-4991/13/10/1651 |
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