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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For stresses curves determination static elastic properties profiles were used. Final values calibrated by known fracture closure gradients and drilling data. Wellbore stability analysis Set geomechanical properties including stress and strength properties distributions may be used to get wellbore stability window [8]. This work helps to compare values predicted by 1D model with actual data from well drilling. As a result horizontal stress profiles can be corrected. For calibration goals wellbore stability windows were computed and correlated with information about drilling parameters (mud density and circulating density) and wellbore integrity: calipers, imagers and etc.

Figure 5. Wellbore stability analysis, borehole imager and caliper

Hydraulic Fracturing

Final stress profiles, taking into account the TIV anisotropy, was used to design the hydraulic fracture. It is shown with the help of geomechanical model that the most using on traditional reservoirs in Western Siberia classic concept of hydraulic fracturing is not applicable to Bajen. Classic approach is to pump a large volume of ceramic proppant with a cross linked, high vicious fluid. Therefore, hydraulic fracturing concept is revised due to geomechanical modeling results. New design assumes using of low-vicious fluid and limited proppant slugs to arrest fracture vertical propagation and contain crack into potentially productive zone.