Relationship between rock macro- and micro-properties and wellbore breakout type
This study numerically investigates the effect of material micro- and macro-parameters on the failure mechanisms and geometry of a wellbore breakout. The analysis of the borehole breakout is essential in addressing wellbore stability, well completion, and sand production problems. The three-dimensio...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-02-01
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| Series: | Underground Space |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967419300911 |
| _version_ | 1797705468764749824 |
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| author | Hossein Rahmati Alireza Nouri Dave Chan Hans Vaziri |
| author_facet | Hossein Rahmati Alireza Nouri Dave Chan Hans Vaziri |
| author_sort | Hossein Rahmati |
| collection | DOAJ |
| description | This study numerically investigates the effect of material micro- and macro-parameters on the failure mechanisms and geometry of a wellbore breakout. The analysis of the borehole breakout is essential in addressing wellbore stability, well completion, and sand production problems. The three-dimensional discrete element method (DEM) was used in the simulations. The numerical tool was used in numerical model simulations of drilling through sandstone in cubic samples at the laboratory scale subjected to pre-existing far-field stresses. Besides, a series of triaxial testing simulations were performed to relate the micromechanical parameters to the macromechanical material properties. The results showed that the geometry of the breakout is affected, among the material micro-parameters, by the particle contact modulus, bond normal and shear strengths, particle crushing strength, and particle size distribution. Further, it was found that the macro-parameters including Young’s modulus, friction and dilation angles, and uniaxial compression strength (UCS) also affect the type of breakout. |
| first_indexed | 2024-03-12T05:36:36Z |
| format | Article |
| id | doaj.art-95733a1c821d4354a63067f7f087dddd |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-12T05:36:36Z |
| publishDate | 2021-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-95733a1c821d4354a63067f7f087dddd2023-09-03T06:19:18ZengKeAi Communications Co., Ltd.Underground Space2467-96742021-02-01616275Relationship between rock macro- and micro-properties and wellbore breakout typeHossein Rahmati0Alireza Nouri1Dave Chan2Hans Vaziri3University of Alberta, Alberta, CanadaUniversity of Alberta, Alberta, Canada; Corresponding author.University of Alberta, Alberta, CanadaBP America Inc., Houston, USAThis study numerically investigates the effect of material micro- and macro-parameters on the failure mechanisms and geometry of a wellbore breakout. The analysis of the borehole breakout is essential in addressing wellbore stability, well completion, and sand production problems. The three-dimensional discrete element method (DEM) was used in the simulations. The numerical tool was used in numerical model simulations of drilling through sandstone in cubic samples at the laboratory scale subjected to pre-existing far-field stresses. Besides, a series of triaxial testing simulations were performed to relate the micromechanical parameters to the macromechanical material properties. The results showed that the geometry of the breakout is affected, among the material micro-parameters, by the particle contact modulus, bond normal and shear strengths, particle crushing strength, and particle size distribution. Further, it was found that the macro-parameters including Young’s modulus, friction and dilation angles, and uniaxial compression strength (UCS) also affect the type of breakout.http://www.sciencedirect.com/science/article/pii/S2467967419300911Borehole breakoutNumerical simulationMaterial properties |
| spellingShingle | Hossein Rahmati Alireza Nouri Dave Chan Hans Vaziri Relationship between rock macro- and micro-properties and wellbore breakout type Underground Space Borehole breakout Numerical simulation Material properties |
| title | Relationship between rock macro- and micro-properties and wellbore breakout type |
| title_full | Relationship between rock macro- and micro-properties and wellbore breakout type |
| title_fullStr | Relationship between rock macro- and micro-properties and wellbore breakout type |
| title_full_unstemmed | Relationship between rock macro- and micro-properties and wellbore breakout type |
| title_short | Relationship between rock macro- and micro-properties and wellbore breakout type |
| title_sort | relationship between rock macro and micro properties and wellbore breakout type |
| topic | Borehole breakout Numerical simulation Material properties |
| url | http://www.sciencedirect.com/science/article/pii/S2467967419300911 |
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