Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE China
Shale oil is hosted in nanopores of organic-rich shales, so pore characteristics are significant for shale oil accumulation. Here we analyzed pore characteristics of 39 lacustrine shale samples of the Late Cretaceous Qingshankou Formation (K<sub>2</sub>qn) in the Songliao Basin, which is...
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MDPI AG
2020-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/8/2027 |
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| author | Xiaomeng Cao Yuan Gao Jingwei Cui Shuangbiao Han Lei Kang Sha Song Chengshan Wang |
| author_facet | Xiaomeng Cao Yuan Gao Jingwei Cui Shuangbiao Han Lei Kang Sha Song Chengshan Wang |
| author_sort | Xiaomeng Cao |
| collection | DOAJ |
| description | Shale oil is hosted in nanopores of organic-rich shales, so pore characteristics are significant for shale oil accumulation. Here we analyzed pore characteristics of 39 lacustrine shale samples of the Late Cretaceous Qingshankou Formation (K<sub>2</sub>qn) in the Songliao Basin, which is one of the main shale oil resource basins in China, using field emission-scanning electron microscopy (FE-SEM), and low-pressure nitrogen adsorption. We accomplished fractal analysis, correlation analysis using correlation matrix and multidimensional scaling (MDS), and prediction of fractal dimensions, which is the first time to predict pore fractal dimensions of shales.<b> </b>Interparticle pores are highly developed in K<sub>2</sub>qn. These shales have mesoporous nature and slit-shaped pores. Compared with the second and third members (K<sub>2</sub>qn<sup>2,3</sup>), the first member of the Qingshankou Formation (K<sub>2</sub>qn<sup>1</sup>) has a larger average pore diameter, much smaller surface area, fewer micropores, simpler pore structure and surface indicated by smaller fractal dimensions. In terms of pore characteristics, K<sub>2</sub>qn<sup>1</sup> is better than K<sub>2</sub>qn<sup>2,3</sup> as a shale oil reservoir. When compared with marine Bakken Formation shales, lacustrine shales of the Qingshankou Formation have similar complexity of pore structure, but much rougher pore surface. This research can lead to an improved understanding of the pore system of lacustrine shales. |
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| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T20:22:20Z |
| publishDate | 2020-04-01 |
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| series | Energies |
| spelling | doaj.art-93bbbd3a706e44828cb9018c0e4509732023-11-19T22:03:40ZengMDPI AGEnergies1996-10732020-04-01138202710.3390/en13082027Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE ChinaXiaomeng Cao0Yuan Gao1Jingwei Cui2Shuangbiao Han3Lei Kang4Sha Song5Chengshan Wang6State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, ChinaState Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, ChinaResearch Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, ChinaGeological Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaState Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, ChinaShale oil is hosted in nanopores of organic-rich shales, so pore characteristics are significant for shale oil accumulation. Here we analyzed pore characteristics of 39 lacustrine shale samples of the Late Cretaceous Qingshankou Formation (K<sub>2</sub>qn) in the Songliao Basin, which is one of the main shale oil resource basins in China, using field emission-scanning electron microscopy (FE-SEM), and low-pressure nitrogen adsorption. We accomplished fractal analysis, correlation analysis using correlation matrix and multidimensional scaling (MDS), and prediction of fractal dimensions, which is the first time to predict pore fractal dimensions of shales.<b> </b>Interparticle pores are highly developed in K<sub>2</sub>qn. These shales have mesoporous nature and slit-shaped pores. Compared with the second and third members (K<sub>2</sub>qn<sup>2,3</sup>), the first member of the Qingshankou Formation (K<sub>2</sub>qn<sup>1</sup>) has a larger average pore diameter, much smaller surface area, fewer micropores, simpler pore structure and surface indicated by smaller fractal dimensions. In terms of pore characteristics, K<sub>2</sub>qn<sup>1</sup> is better than K<sub>2</sub>qn<sup>2,3</sup> as a shale oil reservoir. When compared with marine Bakken Formation shales, lacustrine shales of the Qingshankou Formation have similar complexity of pore structure, but much rougher pore surface. This research can lead to an improved understanding of the pore system of lacustrine shales.https://www.mdpi.com/1996-1073/13/8/2027pore characteristicsfractal dimensionmultidimensional scaling (MDS)lacustrineshale oil |
| spellingShingle | Xiaomeng Cao Yuan Gao Jingwei Cui Shuangbiao Han Lei Kang Sha Song Chengshan Wang Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE China Energies pore characteristics fractal dimension multidimensional scaling (MDS) lacustrine shale oil |
| title | Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE China |
| title_full | Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE China |
| title_fullStr | Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE China |
| title_full_unstemmed | Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE China |
| title_short | Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE China |
| title_sort | pore characteristics of lacustrine shale oil reservoir in the cretaceous qingshankou formation of the songliao basin ne china |
| topic | pore characteristics fractal dimension multidimensional scaling (MDS) lacustrine shale oil |
| url | https://www.mdpi.com/1996-1073/13/8/2027 |
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