Research Article
Genetic Types and Main Control Factors of Microfractures in Tight Oil Reservoirs of Jimsar Sag
Table 2
Effect of fluids on mechanical properties of the Lucaogou Formation tight sandstones in the Jimsar Sag, Junggar Basin.
| Water saturation (%) | Compressive strength (GPa) | Ratio of decrease (%) | Elastic modulus (GPa) | Ratio of decrease (%) | Poisson’s ratio | Ratio of increase (%) | Group |
| 0 | 156.94 | | 29.75 | | 0.259 | | G1 | 30 | 151.44 | 0.035 | 22.78 | 0.23 | 0.258 | 0.0039 | G1 | 80 | 146.12 | 0.035 | 20.23 | 0.11 | 0.295 | 0.1434 | G1 | 100 | 80.58 | 0.449 | 7.52 | 0.63 | 0.554 | 0.8780 | G1 | 0 | 156.33 | | 25.01 | | 0.283 | | G2 | 30 | 146.16 | 0.065 | 21.65 | 0.13 | 0.284 | 0.0035 | G2 | 90 | 90.22 | 0.321 | 14.30 | 0.34 | 0.289 | 0.0176 | G2 | 100 | 80.23 | 0.191 | 8.30 | 0.42 | 0.446 | 0.5433 | G2 | 0 | 146.21 | | 26.35 | | 0.214 | | G3 | 30 | 140.90 | 0.036 | 20.99 | 0.20 | 0.221 | 0.0327 | G3 | 70 | 93.73 | 0.335 | l8.88 | 0.10 | 0.368 | 0.6652 | G3 | 100 | 79.26 | 0.154 | 15.36 | 0.19 | 0.392 | 0.0652 | G3 |
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