Method capable of directly improving permeability of oil gas reservoir

Abstract

The invention discloses a method capable of directly improving the permeability of an oil gas reservoir. Reservoir resonance is caused by a pneumatic resonance device in a well and micropores in the reservoir are increased, so that the permeability is improved. A resonator and a ground air compressor are connected through oil pipes in the well, air with different discharge capacities acts on the resonator, and a piston of the resonator is driven by the gas to move up and down to drive a vibrator to vibrate rocks at the bottom of the well with different frequencies; at the moment, a ground acceleration sensor outputs correspondingly and differently, the maximum output value of the acceleration sensor is found, the underground reservoir can be considered to be in or near a resonance state, and an air compressor control system is adjusted to enable the underground resonator to work at the frequency, so that the permeability can be effectively improved. The method is simple in operation and low in cost; the direct effect of the physical property improving effect of the reservoir is obvious; the action time can be controlled.

Description

technical field [0001] The invention belongs to the technical field of natural gas, and in particular relates to a method and a device for directly improving the permeability of oil and gas reservoirs. Background technique [0002] Improving the single-well production of oil and gas wells (including shale gas, coalbed methane and other unconventional natural gas) is currently a key task carried out by oil and gas fields and scientific research institutes at home and abroad. Generally, there are physical methods such as fracturing, ultrasonic plugging removal, water injection, polymer injection, etc.; chemical methods such as acidification, etc. Its essence is to improve the physical properties of the reservoir, especially the permeability of the reservoir, and establish effective channels so that oil and gas can migrate out to achieve the purpose of improving recovery. At present, my country's oil and gas recovery rate has reached more than 35%, far exceeding the average le...

AI Technical Summary

Problems solved by technology

In this way, the oil and gas in the reservoir cannot smoothly enter the macroscopic channels due to the lack of micro-fractures and micro-pores, thus resulting in the current single-well production of unconventional oil and gas generally being low

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