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Experimental study and numerical modeling of fracture propagation in shale rocks during Brazilian disk test
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Mousavi Nezhad, Mohaddeseh, Fisher, Quentin J., Gironacci, Elia and Rezania, Mohammad (2018) Experimental study and numerical modeling of fracture propagation in shale rocks during Brazilian disk test. Rock Mechanics and Rock Engineering, 51 (6). pp. 1755-1775. doi:10.1007/s00603-018-1429-x
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Official URL: http://doi.org/10.1007/s00603-018-1429-x
Abstract
Reliable prediction of fracture process in shale-gas rocks remains one of the most significant challenges for establishing sustained economic oil and gas production. This paper presents a modeling framework for simulation of crack propagation in heterogeneous shale rocks. The framework is on the basis of a variational approach, consistent with Griffith’s theory. The modeling framework is used to reproduce the fracture propagation process in shale rock samples under standard Brazilian disk test conditions. Data collected from the experiments are employed to determine the testing specimens’ tensile strength and fracture toughness. To incorporate the effects of shale formation heterogeneity in the simulation of crack paths, fracture properties of the specimens are defined as spatially random fields. A computational strategy on the basis of stochastic finite element theory is developed that allows to incorporate the effects of heterogeneity of shale rocks on the fracture evolution. A parametric study has been carried out to better understand how anisotropy and heterogeneity of the mechanical properties affect both direction of cracks and rock strength.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TN Mining engineering. Metallurgy | ||||||||
| Divisions: | Faculty of Science > Engineering | ||||||||
| SWORD Depositor: | Library Publications Router | ||||||||
| Library of Congress Subject Headings (LCSH): | Hydraulic fracturing -- Mathematical models., Shale gas., Rock mechanics., Rocks -- Fracture -- Mathematical models., Engineering geology. | ||||||||
| Journal or Publication Title: | Rock Mechanics and Rock Engineering | ||||||||
| Publisher: | Springer Nature | ||||||||
| ISSN: | 1434-453X | ||||||||
| Official Date: | June 2018 | ||||||||
| Dates: |
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| Volume: | 51 | ||||||||
| Number: | 6 | ||||||||
| Page Range: | pp. 1755-1775 | ||||||||
| DOI: | 10.1007/s00603-018-1429-x | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access |
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