... exceeding 0.4, which is especially notable in reservoirs of complex geology. Drainage of oil reserves is also significantly affected by discrepancies in directions of regional horizontal stresses. Movement of injected water and propagation of natural and hydraulic fractures go along thedirections of maximum stresses, thus increasing poorly swept areas. Changing fracture propagation patterns enables better stimulation of the pay zone and recovery of bypassed and dead-end oil as well as extraction from ...

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