Acoustic flow stimulation method and apparatus

E - Fixed Constructions – 21 – B

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E21B 43/25 (2006.01) E21B 43/00 (2006.01)

Patent

CA 2036116

ABSTRACT OF THE DISCLOSURE ACOUSTIC FLOW STIMULATION METHOD AND APPARATUS Stimulating fluid production in a producing well without stopping production from the well. This is carried out by running into a producing well on an electric wireline a well stimulating tool sized and adapted for passage through a production tubing and placing the stimulating tool at a depth opposite perforations in a producing zone in the well. The area of the perforations are irradiated with acoustic energy in the frequency range from 5 kilohertz to 30 kilohertz for a predetermined length of time; the stimulating tool is moved to a different depth by raising or lowering it on the wireline and repeating the irradiations at different depths. The acoustic irradiating steps move fines and decrease the well fluid viscosity in the vicinity of the perforations, thereby increasing fluid production from the well. The apparatus used includes an elongate tool housing for running in a cased and perforated well borehole; an acoustic transducer in the housing for forming an acoustic pulse for impinging on a formation to loosen fines for removal with formation fluid flow; and a device further acting on the formation fluid flow to reduce viscosity thereof to enable enhanced flow from the formation into the perforations in the well.

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