Research Article
Discrete Element Analysis for Hydraulic Fracture Propagations in Laminated Reservoirs with Complex Initial Joint Properties
Table 6
Percentage of each fracture type with different tensile-to-shear strength ratios.
| Joint strength (tensile-to-shear strength ratio) | Approach angle | Sjs | Sjt | Pbs | Pbt |
|
(0.75 : 1) | 30° | 0.253 | 0.022 | 0.231 | 0.493 | 45° | 0.337 | 0.014 | 0.243 | 0.405 | 60° | 0.439 | 0.018 | 0.189 | 0.353 | 75° | 0.399 | 0.009 | 0.256 | 0.336 | 90° | 0.159 | 0.000 | 0.322 | 0.519 |
|
(1 : 1) | 30° | 0.348 | 0.018 | 0.266 | 0.368 | 45° | 0.424 | 0.021 | 0.235 | 0.320 | 60° | 0.524 | 0.013 | 0.196 | 0.267 | 75° | 0.532 | 0.000 | 0.207 | 0.261 | 90° | 0.474 | 0.009 | 0.215 | 0.302 |
|
(1.25 : 1) | 30° | 0.475 | 0.012 | 0.201 | 0.312 | 45° | 0.520 | 0.016 | 0.182 | 0.283 | 60° | 0.584 | 0.008 | 0.185 | 0.223 | 75° | 0.547 | 0.000 | 0.197 | 0.256 | 90° | 0.576 | 0.007 | 0.185 | 0.233 |
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