Nonlinear Wave Control Actions To Increase Oil Recovery Of Natural Oil Deposits

Abstract

In the process of developing oil fields, wave periodic disturbances are used to increase the flow rate of wells and increase the final oil recovery of layers. In an inhomogeneous medium, in the presence of dissipation and / or dispersion, harmonic oscillations created in the wellbores transform into sawtooth waves with periodic shock fronts. Consideration and use of this circumstance will lead to an increase in the share of recoverable reserves of fields: created by a downward vibrator: external harmonic disturbances converted in a dissipative medium into sawtooth shock waves cause cavitation in a liquid medium, and secondary shock waves generated from collapsing bubbles overcome capillary forces that hold oil residues on the surfaces of voids and cracks. These effects lead to a noticeable decrease in the permeability of the reservoir and a significant increase in the final oil recovery of oil formations.