Effect of Brittle Mineral Size on Hydraulic Fracture Propagation in Shale Gas Reservoir
The properties of brittle minerals have great effect on the morphology of postfracturing network in shale reservoirs in the southeastern Ordos Basin, China. In order to study the effect of brittle mineral size distributions on the fracture parameters, the concrete cubes of 300 mm × 300 mm × 300 mm i...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2019/9147048 |
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| author | Wei Gao Javed Iqbal Dan Xu Haoyue Sui Ruilin Hu |
| author_facet | Wei Gao Javed Iqbal Dan Xu Haoyue Sui Ruilin Hu |
| author_sort | Wei Gao |
| collection | DOAJ |
| description | The properties of brittle minerals have great effect on the morphology of postfracturing network in shale reservoirs in the southeastern Ordos Basin, China. In order to study the effect of brittle mineral size distributions on the fracture parameters, the concrete cubes of 300 mm × 300 mm × 300 mm in size with four distinct brittle mineral sizes of 2.36 mm, 0.425 mm, 0.15 mm, and 0.075 mm were investigated under large-sized triaxial hydraulic fracturing test. The effect mechanism of aggregate on the fracture properties of shale was studied using ultrasonic technique, photosensitive electron microscope, and numerical simulation. The test results obtained for each specimen (both disturbed and undisturbed conditions) indicate that brittle mineral size has significant effect on the fracture extension. The tensile strength, fracture toughness, and fracture pressure were found to decrease with a decrease in maximum brittle mineral size when the maximum brittle mineral size is smaller than 0.425 mm. In addition to this, the degree of attenuation difference also follows the similar trend. Observed fracture morphology reveals that with an increase in maximum size of brittle mineral specimen, the tortuous and complicated cracking path generation increases. These findings would be very helpful in order to better understand the behavior of shale under hydraulic fracturing test. |
| format | Article |
| id | doaj-art-d5f2ea2e91e049f59a83b0993fdf0cfb |
| institution | DOAJ |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
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| series | Geofluids |
| spelling | doaj-art-d5f2ea2e91e049f59a83b0993fdf0cfb2025-08-20T03:23:38ZengWileyGeofluids1468-81151468-81232019-01-01201910.1155/2019/91470489147048Effect of Brittle Mineral Size on Hydraulic Fracture Propagation in Shale Gas ReservoirWei Gao0Javed Iqbal1Dan Xu2Haoyue Sui3Ruilin Hu4Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, No. 19, Beitucheng Western Road, Chaoyang District, Beijing 100029, ChinaDepartment of Earth Sciences, Abbottabad University of Science and Technology, PakistanChina Railway 11th Bureau Group Co. Ltd., No. 277, Zhongshan Road, Wuchang District, Wuhan, Hubei Province, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, No. 19, Beitucheng Western Road, Chaoyang District, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, No. 19, Beitucheng Western Road, Chaoyang District, Beijing 100029, ChinaThe properties of brittle minerals have great effect on the morphology of postfracturing network in shale reservoirs in the southeastern Ordos Basin, China. In order to study the effect of brittle mineral size distributions on the fracture parameters, the concrete cubes of 300 mm × 300 mm × 300 mm in size with four distinct brittle mineral sizes of 2.36 mm, 0.425 mm, 0.15 mm, and 0.075 mm were investigated under large-sized triaxial hydraulic fracturing test. The effect mechanism of aggregate on the fracture properties of shale was studied using ultrasonic technique, photosensitive electron microscope, and numerical simulation. The test results obtained for each specimen (both disturbed and undisturbed conditions) indicate that brittle mineral size has significant effect on the fracture extension. The tensile strength, fracture toughness, and fracture pressure were found to decrease with a decrease in maximum brittle mineral size when the maximum brittle mineral size is smaller than 0.425 mm. In addition to this, the degree of attenuation difference also follows the similar trend. Observed fracture morphology reveals that with an increase in maximum size of brittle mineral specimen, the tortuous and complicated cracking path generation increases. These findings would be very helpful in order to better understand the behavior of shale under hydraulic fracturing test.http://dx.doi.org/10.1155/2019/9147048 |
| spellingShingle | Wei Gao Javed Iqbal Dan Xu Haoyue Sui Ruilin Hu Effect of Brittle Mineral Size on Hydraulic Fracture Propagation in Shale Gas Reservoir Geofluids |
| title | Effect of Brittle Mineral Size on Hydraulic Fracture Propagation in Shale Gas Reservoir |
| title_full | Effect of Brittle Mineral Size on Hydraulic Fracture Propagation in Shale Gas Reservoir |
| title_fullStr | Effect of Brittle Mineral Size on Hydraulic Fracture Propagation in Shale Gas Reservoir |
| title_full_unstemmed | Effect of Brittle Mineral Size on Hydraulic Fracture Propagation in Shale Gas Reservoir |
| title_short | Effect of Brittle Mineral Size on Hydraulic Fracture Propagation in Shale Gas Reservoir |
| title_sort | effect of brittle mineral size on hydraulic fracture propagation in shale gas reservoir |
| url | http://dx.doi.org/10.1155/2019/9147048 |
| work_keys_str_mv | AT weigao effectofbrittlemineralsizeonhydraulicfracturepropagationinshalegasreservoir AT javediqbal effectofbrittlemineralsizeonhydraulicfracturepropagationinshalegasreservoir AT danxu effectofbrittlemineralsizeonhydraulicfracturepropagationinshalegasreservoir AT haoyuesui effectofbrittlemineralsizeonhydraulicfracturepropagationinshalegasreservoir AT ruilinhu effectofbrittlemineralsizeonhydraulicfracturepropagationinshalegasreservoir |