Research Article
Anisotropy and Energy Evolution Characteristics of Shales: A Case Study of the Longmaxi Formation in Southern Sichuan Basin, China
Table 1
Energy parameters at peak strength point of shale at different bedding angles.
| | Bedding angle | Total energy (J/cm-3) | Elastic energy (J/cm-3) | Dissipative energy (J/cm-3) | E-energy/T-energy (%)AVG | D-energy/T-energy (%)AVG |
| | 0° | 0.3731 | 0.3165 | 0.0566 | 85.09 | 14.91 | | 0.3952 | 0.3465 | 0.0487 | | 0.3593 | 0.2965 | 0.0628 |
| | 15° | 0.2653 | 0.2168 | 0.0485 | 82.12 | 17.88 | | 0.2923 | 0.2322 | 0.0601 | | 0.2556 | 0.2188 | 0.0368 |
| | 30° | 0.2451 | 0.1973 | 0.0478 | 81.10 | 18.90 | | 0.2665 | 0.2236 | 0.0430 | | 0.2399 | 0.1886 | 0.0512 |
| | 45° | 0.2002 | 0.1571 | 0.0430 | 77.97 | 22.03 | | 0.2110 | 0.1691 | 0.0420 | | 0.1936 | 0.1454 | 0.0482 |
| | 60° | 0.1542 | 0.1437 | 0.0104 | 90.41 | 9.59 | | 0.1875 | 0.1673 | 0.0202 | | 0.1659 | 0.1479 | 0.0180 |
| | 75° | 0.2716 | 0.2512 | 0.0205 | 92.37 | 7.63 | | 0.2618 | 0.2486 | 0.0132 | | 0.2967 | 0.2670 | 0.0297 |
| | 90° | 0.2989 | 0.2895 | 0.0094 | 96.83 | 3.17 | | 0.2886 | 0.2795 | 0.0092 | | 0.2778 | 0.2689 | 0.0088 |
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