Numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on CT scanning with different quartz contents
Abstract The quartz content and internal fractures of shale are important factors affecting its mechanical properties and damage modes. To study the mechanical properties of shale under the effect of quartz content and internal cracks, this study used CT scanning technology and digital image process...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-09-01
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| Series: | Journal of Petroleum Exploration and Production Technology |
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| Online Access: | https://doi.org/10.1007/s13202-024-01867-8 |
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| author | Xianchao Yang Zhonghu Wu Jun Yu Jintao Zhou Guoqing He |
| author_facet | Xianchao Yang Zhonghu Wu Jun Yu Jintao Zhou Guoqing He |
| author_sort | Xianchao Yang |
| collection | DOAJ |
| description | Abstract The quartz content and internal fractures of shale are important factors affecting its mechanical properties and damage modes. To study the mechanical properties of shale under the effect of quartz content and internal cracks, this study used CT scanning technology and digital image processing technology, combined with finite element software to establish a three-dimensional numerical model of shale with different quartz contents and different angles of internal prefabricated cracks, and carried out numerical simulations of Brazilian splitting. Both the quartz content and internal prefabricated cracks in shale can significantly affect the tensile strength of shale. The tensile strength is positively correlated with the quartz content in shale, and tends to increase and then decrease with increasing angle of the internal prefabricated cracks. The quartz content and the internal prefabricated cracks together control the damage of shale, the quartz content increases the damage degree of shale, and the internal prefabricated cracks control the rupture mode of shale, The cracks will have a significant guiding role in crack expansion with increasing angle, and finally show a significant influence on crack expansion from type I to type II. The research results of this paper will play a certain role in promoting the exploitation of shale gas. |
| format | Article |
| id | doaj-art-acda4e79b4ae4a30babb64fc4fcc1ae4 |
| institution | Kabale University |
| issn | 2190-0558 2190-0566 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Petroleum Exploration and Production Technology |
| spelling | doaj-art-acda4e79b4ae4a30babb64fc4fcc1ae42024-11-17T12:10:56ZengSpringerOpenJournal of Petroleum Exploration and Production Technology2190-05582190-05662024-09-0114112995301210.1007/s13202-024-01867-8Numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on CT scanning with different quartz contentsXianchao Yang0Zhonghu Wu1Jun Yu2Jintao Zhou3Guoqing He4College of Civil Engineering, Guizhou UniversityCollege of Civil Engineering, Guizhou UniversityCollege of Civil Engineering, Guizhou UniversityCollege of Civil Engineering, Guizhou UniversityCollege of Civil Engineering, Guizhou UniversityAbstract The quartz content and internal fractures of shale are important factors affecting its mechanical properties and damage modes. To study the mechanical properties of shale under the effect of quartz content and internal cracks, this study used CT scanning technology and digital image processing technology, combined with finite element software to establish a three-dimensional numerical model of shale with different quartz contents and different angles of internal prefabricated cracks, and carried out numerical simulations of Brazilian splitting. Both the quartz content and internal prefabricated cracks in shale can significantly affect the tensile strength of shale. The tensile strength is positively correlated with the quartz content in shale, and tends to increase and then decrease with increasing angle of the internal prefabricated cracks. The quartz content and the internal prefabricated cracks together control the damage of shale, the quartz content increases the damage degree of shale, and the internal prefabricated cracks control the rupture mode of shale, The cracks will have a significant guiding role in crack expansion with increasing angle, and finally show a significant influence on crack expansion from type I to type II. The research results of this paper will play a certain role in promoting the exploitation of shale gas.https://doi.org/10.1007/s13202-024-01867-8ShaleQuartzInternal prefabricated cracksCT scan3D numerical modellingBrazilian cleavage test |
| spellingShingle | Xianchao Yang Zhonghu Wu Jun Yu Jintao Zhou Guoqing He Numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on CT scanning with different quartz contents Journal of Petroleum Exploration and Production Technology Shale Quartz Internal prefabricated cracks CT scan 3D numerical modelling Brazilian cleavage test |
| title | Numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on CT scanning with different quartz contents |
| title_full | Numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on CT scanning with different quartz contents |
| title_fullStr | Numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on CT scanning with different quartz contents |
| title_full_unstemmed | Numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on CT scanning with different quartz contents |
| title_short | Numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on CT scanning with different quartz contents |
| title_sort | numerical experimental study on the fracture process of shale containing internal prefabricated cracks based on ct scanning with different quartz contents |
| topic | Shale Quartz Internal prefabricated cracks CT scan 3D numerical modelling Brazilian cleavage test |
| url | https://doi.org/10.1007/s13202-024-01867-8 |
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