Physical Method for Unblock and Enhance Oil Production

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Physical Method for Unblock and Enhance Oil Production

Hydraulic oscillation cavitation technology uses a cement truck or nitrogen truck to inject a mixed fluid, which triggers acoustic wave oscillations to break down near-wellbore and screen-tube blockages.

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(1) Hydraulic Oscillation Cavity Unblocking Technology

Technical Principles
Hydraulic oscillation cavitation technology uses a cement truck and nitrogen truck to inject a mixed fluid, which triggers acoustic wave oscillations to break down near-wellbore and screen-tube blockages. Under the combined effects of oscillation, cavitation, and negative pressure, the blockages loosen and are subsequently carried away from the wellbore along with the returning fluid. Additionally, the oscillation-cavitation process creates micro-fractures near the wellbore, enhancing near-well permeability and ultimately boosting the production capacity of new wells.

(2) Hydraulic Acoustic Wave Oscillation Cavitation Unblock Technology

Technical Principles
Hydraulic oscillation-based cavitation unblocking and production-enhancing technology works by injecting high-pressure fluids into the wellbore using a pump truck and a nitrogen truck. As the fluid passes through an oscillator, it generates intense, low-frequency sound waves accompanied by cavitation effects. These sound-wave oscillations and cavitation forces work together to dislodge blockages around the wellbore. Meanwhile, the alternating stress induced by the sound waves and the shockwaves from cavitation create microscopic fractures in the near-wellbore formation, effectively clearing the formation, improving the physical properties of the near-well area, and ultimately boosting both production rates and fluid output.

(3) Hydraulic Super-Resonance Negative-Pressure Unblockage Technology

Technical Principles
During the operation, lower the tubing (Φ73mm) equipped with a hydraulic vibratory tool into the wellbore until it reaches the zone requiring stimulation. The string is assembled from bottom to top as follows: bottom plug + screen pipe + hydraulic vibrator + tubing. Connect the surface pump line to ensure the tubing column is fully filled with the working fluid. Then, drop a ball into the tubing via the wellhead ball launcher. Once the surface pump starts pressurizing, the specially designed ball will suddenly pass through the ball seat, causing the working fluid to release instantly and generate a powerful hydraulic shockwave that directly impacts the formation surrounding the wellbore. This intense pressure surge propagates into the reservoir, creating micro-fractures within the formation. These fractures help break apart and loosen the debris blocking the pore spaces, allowing them to detach from the rock matrix. Meanwhile, the high-pressure fluid rapidly penetrates deeper into the formation, effectively flushing and cleaning the reservoir while restoring and enhancing both oil production rates and water injection capabilities.