PSI - Issue 6

A. Martemyanov et al. / Procedia Structural Integrity 6 (2017) 292–300 Martemyanov Andrey et al / Structural Integrity Procedia 00 (2017) 000 – 000

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from core tests. Anisotropy intervals, identified by acoustic log data, is confirmed by core testing on samples drilled with different angles relative to the bedding (Figure 3). Tracks 6 and 7 show the results of comparing the Young's modulus of the dynamic (track 6) and the static (track 7) calculated from the log (the blue line corresponds to the vertical component, the green one to the horizontal one) and the core obtained (according to the vertical component, green - horizontal).

Figure 4. Comparison of the mechanical properties of rocks calculated from the log data and the cores obtained from the results of testing (track 6 and 7). Comparison of horizontal stresses calculated with VTI anisotropy (track 9, green curve) and isotropic model (track 9, black curve) Stress calculation Magnitude of the vertical stress is made up of the overlying rocks weight [8]. To calculate it, it is sufficient to integrate the density:

Pore pressure distribution rarely differs from the hydrostatic law. However, due to the low permeability of Bajen interval rocks and high temperatures it should expect increased values of pore pressure. This parameter was estimated by Eaton method [10,11,12]. Horizontal Stresses calculation based on poroelastic model and governed by equations: