Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling

The article presents the results of analysing geological structure Famennian deposits (Devonian) in Perm Region. Numerical modelling distribution inhomogeneous stress field near well was performed for two considered types perforation. With regard geometry forming perforation channels, numerical finite element models near-wellbore zones were created considering slotted and cumulative It is ascertained that course perforation, conditions are a significant restoration effective stresses and, as result, reservoir rock permeability. Stress recovery area lies within radius equal to length slots, depends on drawdown, with its increase, decreases. From assessment failure areas, it found case zone remains stable, can appear only at drawdowns 10 MPa more. opposite situation recorded perforation; holes even drawdown 2 MPa. In general, analysis simulation state simulated suggests more efficient than At same time, final conclusion could be drawn after determining patterns changes permeability rocks under influence changing performing calculations flow rates making channels.