Research Article
Creep Behaviors of Interlayers around an Underground Strategic Petroleum Reserve (SPR) Cavern in Bedded Salt Rocks
Table 3
Creep parameters of sample after oil erosion under different stress levels.
| | Strain | | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 |
| | Axial strain | | 3.382 × 10−3 | 4.765 10−3 | 5.620 10−3 | 9.897 10−3 | 1.068 10−2 | | 4.076 × 10−4 | 1.904 × 10−4 | 1.064 10−3 | 3.779 10−4 | 3.581 10−4 | | 2.47 10−5/h | 1.36 10−5/h | 3.60 10−3/h | 1.56 10−5/h | 2.67 10−4/h | | Mutation | 2.685 × 10−4 | 2.586 × 10−4 | 1.541 × 10−3 | — | — | | 3.184 × 10−4 | 7.597 × 10−4 | 1.243 10−3 | — | — | | 4.21 10−5/h | 7.38 10−5/h | 5.07 10−5/h | — | — | | 4.376 × 10−3 | 5.212 10−3 | 9.469 10−3 | 1.027 10−2 | 1.104 × 10−2 |
| | Lateral strain | | −2.539 10−5 | −8.254 10−5 | −8.889 10−5 | −4.176 10−2 | −5.389 10−2 | | −5.715 10−5 | −6.349 10−6 | −1.269 10−5 | −1.212 10−2 | −2.952 10−3 | | −3.46 10−6/h | −4.56 10−7/h | −4.89 10−5/h | −5.02 10−4/h | −2.12 10−3/h | | Mutation | — | — | −3.072 × 10−2 | — | — | | — | — | −9.232 10−3 | — | — | | — | — | −3.77 10−3/h | — | — | | −8.254 10−5 | −8.889 10−5 | −4.0 10−2 | −5.389 10−2 | −5.684 10−2 |
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