Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions
In many rock engineering projects such as hydrocarbon extraction and geothermal energy utilization, the hydraulic and mechanical behavior of rock fractures significantly affects the safety and profitability of the project. In field conditions, the hydraulic and mechanical behavior of rock fractures...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Hindawi
2021
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| Online Access: | https://hdl.handle.net/1721.1/129645 |
| _version_ | 1811082709563342848 |
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| author | Kang, Hao Einstein, Herbert H Brown, Stephen |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Kang, Hao Einstein, Herbert H Brown, Stephen |
| author_sort | Kang, Hao |
| collection | MIT |
| description | In many rock engineering projects such as hydrocarbon extraction and geothermal energy utilization, the hydraulic and mechanical behavior of rock fractures significantly affects the safety and profitability of the project. In field conditions, the hydraulic and mechanical behavior of rock fractures changes with time (the rock fractures creep), and this creep is not negligible even under dry conditions. In addition, creep is strongly affected by the rock fracture surface geometry. However, there is not much literature systematically studying the effect of surface geometry on rock fracture creep under dry conditions. This paper presents the results of a numerical study considering the effect of surface geometry on rough fracture viscoelastic deformations. An in-house numerical code has been developed to simulate the viscoelastic deformation of rough fractures. In addition, another numerical code has been developed to generate synthetic rough fracture surfaces by systematically changing the surface roughness parameters: the Hurst exponent, mismatch length, and root mean square roughness. The results indicate that by increasing the Hurst exponent or decreasing the mismatch length or decreasing the root mean square roughness, the fracture mean aperture decreases, and the contact ratio (number of contacting cells/total number of cells) increases faster with time. |
| first_indexed | 2024-09-23T12:07:42Z |
| format | Article |
| id | mit-1721.1/129645 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:07:42Z |
| publishDate | 2021 |
| publisher | Hindawi |
| record_format | dspace |
| spelling | mit-1721.1/1296452022-09-28T00:20:01Z Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions Kang, Hao Einstein, Herbert H Brown, Stephen Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences In many rock engineering projects such as hydrocarbon extraction and geothermal energy utilization, the hydraulic and mechanical behavior of rock fractures significantly affects the safety and profitability of the project. In field conditions, the hydraulic and mechanical behavior of rock fractures changes with time (the rock fractures creep), and this creep is not negligible even under dry conditions. In addition, creep is strongly affected by the rock fracture surface geometry. However, there is not much literature systematically studying the effect of surface geometry on rock fracture creep under dry conditions. This paper presents the results of a numerical study considering the effect of surface geometry on rough fracture viscoelastic deformations. An in-house numerical code has been developed to simulate the viscoelastic deformation of rough fractures. In addition, another numerical code has been developed to generate synthetic rough fracture surfaces by systematically changing the surface roughness parameters: the Hurst exponent, mismatch length, and root mean square roughness. The results indicate that by increasing the Hurst exponent or decreasing the mismatch length or decreasing the root mean square roughness, the fracture mean aperture decreases, and the contact ratio (number of contacting cells/total number of cells) increases faster with time. Abu Dhabi National Oil Company (Project 015-RCM-2015) 2021-02-03T16:15:25Z 2021-02-03T16:15:25Z 2020-12-10 2020-12-13T08:00:14Z Article http://purl.org/eprint/type/JournalArticle 1468-8115 https://hdl.handle.net/1721.1/129645 Kang, Hao et al. “Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions.” Geofluids, 2020 (December 2020): 8879890 © 2020 The Author(s) en http://dx.doi.org/10.1155/2020/8879890 Geofluids Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Copyright © 2020 Hao Kang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. application/pdf Hindawi Hindawi |
| spellingShingle | Kang, Hao Einstein, Herbert H Brown, Stephen Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions |
| title | Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions |
| title_full | Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions |
| title_fullStr | Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions |
| title_full_unstemmed | Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions |
| title_short | Numerical Simulation for Rock Fracture Viscoelastic Creep under Dry Conditions |
| title_sort | numerical simulation for rock fracture viscoelastic creep under dry conditions |
| url | https://hdl.handle.net/1721.1/129645 |
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