Shock wave generating device and method for increasing yield of oil-gas well

Abstract

An embodiment of the invention provides a shock wave generating device and a method for increasing the yield of an oil-gas well, and relates to the technical field of electric pulses. The shock wave generating device comprises a power supply, a transformer, a rectifying device, a high-voltage energy storage capacitor, a discharge switch and an underwater load which are electrically connected in sequence. The power supply is used for providing electric energy for continuous work of the shock wave generating device, the transformer and the rectifying device are used for converting low-voltage alternating current output by the power supply into needed high-voltage direct current, the high-voltage energy storage capacitor is used for storing the electric energy, and the discharge switch is used for enabling the electric energy stored by the high-voltage energy storage capacitor to be loaded to the underwater load after being switched on to form shock waves. The method for increasing the yield of the oil-gas well adopts the shock wave generating device, and the frequency of formed shock waves is equal to the natural vibration frequency of a reservoir in the oil-gas well. According to the device and the method, the shock waves generated by electric pulse discharge and reservoir resonance in the oil-gas well are used for increasing the yield of the oil-gas well, and the device and themethod have the advantages of high shock wave strength, good yield-increasing effect and high working repeatability and stability.

Description

technical field [0001] The invention relates to the field of electric pulse technology, in particular to a shock wave generating device and a method for increasing production of oil and gas wells. Background technique [0002] Electric pulse oil recovery technology is a new oil and gas well plugging removal and production increase technology, and its related research is in a vigorous development stage at home and abroad. According to the way of generating shock waves, the existing electric pulse oil recovery technology can be roughly divided into two categories: [0003] (1) Shock waves are generated based on the principle of water gap breakdown discharge. The principle of the device is simple, the operation is stable and reliable, and the number of repeated discharges can reach tens of thousands of times. However, since the breakdown of the water gap requires a large part of energy for preheating, the energy utilization efficiency is low, and the shock wave intensity gener...

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Problems solved by technology

However, this technology requires the device to automatically load the metal wire after each discharge. The wire loading mechanism is relatively complicated, and the working stability in the underground is poor, and the number of repeated discharges does not exceed 100 times.

[0005] The common objective disadvantage of the existing technology is that the shock wave intensity generated is relatively small, or the stability of the device is relatively poor, or both, resulting in poor plug removal and production increase effects in some oil and gas wells

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