The results of modeling of geomechanical properties and stress state of the Bazhenov Formation sediments are presented in the paper. Formation layers are transversally isotropic objects with vertical direction of the symmetry axis. Nuclear magnetic logging (NML) data are interpreted based on iterative selection of the cutoff for time T2. The resulting porosity curves for a given well are used as a trend to calculate the leak-off for further hydraulic fracturing modeling. Based on the analysis of the results of hydraulic fracturing and hydrodynamic modeling an assumption is made about the influence of natural crack conductivity on the nature of leaks during the hydraulic fracturing: fractures have a higher permeability compared to the formation permeability and hydraulic fracturing fluid easily leak off into them. During hydraulic fracture propagation modeling, this effect is taken into account as follows: leaks should be pressure dependent (PDL) and therefore change over the time. It should be noted that, along with fracturing, possible causes of increased leaks during hydraulic fracturing operations may include leakage of packers and leakage into the annulus, as well as the growth of a crack in height through a barrier into the next less stressed zone. Using the corresponding tools of RN-GRID software package, the hydraulic fracturing process is modeled taking into account PDL. The calculation results show a serious influence of this parameter on the final geometry of the hydraulic fracture.
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