Abstract
The objective of this study is to quantify the effects of fracture intersections on the frequency-dependent elastic properties of porous and fractured rocks. Three characteristic frequency ranges for fluid pressure communication are identified. In the low frequency limit, fractures are in full pressure communication
with the porous matrix. In the high frequency limit, fractures are hydraulically isolated from the matrix and from each other. At intermediate frequencies, fractures are hydraulically isolated from the matrix porosity, but can be in hydraulic communication with each other, depending on whether fracture sets are intersecting. The theoretical solutions for each physical state are derived using linear-slip theory and anisotropic Gassmann equation. The theoretical predictions are then performed for two synthetic 2D samples each containing two orthogonal fracture sets, one with and the other without intersections. The results show good agreement with numerical simulations. The theoretical results are applicable not only to 2D but also to 3D fracture systems.
with the porous matrix. In the high frequency limit, fractures are hydraulically isolated from the matrix and from each other. At intermediate frequencies, fractures are hydraulically isolated from the matrix porosity, but can be in hydraulic communication with each other, depending on whether fracture sets are intersecting. The theoretical solutions for each physical state are derived using linear-slip theory and anisotropic Gassmann equation. The theoretical predictions are then performed for two synthetic 2D samples each containing two orthogonal fracture sets, one with and the other without intersections. The results show good agreement with numerical simulations. The theoretical results are applicable not only to 2D but also to 3D fracture systems.
| Original language | English |
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| Title of host publication | 78th EAGE Conference & Exhibition 2016 |
| Publisher | European Association of Geoscientists and Engineers, EAGE |
| Number of pages | 5 |
| ISBN (Electronic) | 9789462821859 |
| DOIs | |
| Publication status | Published - May 2016 |
| Event | 78th EAGE Conference and Exhibition - Vienna, Austria Duration: 30 May 2016 → 2 Jun 2016 https://prod.eage.org/sitecore/content/events/home/2016/78th-eage-conference-and-exhibition-vienna-2016?sc_lang=en |
Publication series
| Name | 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential |
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Conference
| Conference | 78th EAGE Conference and Exhibition |
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| Abbreviated title | EAGE 2016 |
| Country/Territory | Austria |
| City | Vienna |
| Period | 30/05/16 → 2/06/16 |
| Internet address |