Pulse fracturing device and method

Abstract

The invention discloses a pulse fracturing device, which comprises a charging and discharging control module, a pulse current modulation module and a discharging electrode, wherein the charging and discharging control module is used for generating and sending first threshold value direct current voltage, the pulse current modulation module is coupled with the charging and discharging control module and modulates the pulse discharging current generated by the first threshold value direct current voltage, and the discharging electrode is coupled with the pulse current modulation module and is used for converting electric energy of the modulated pulse discharging current into mechanical energy. The invention provides the pulse fracturing device which only consumes the electric energy. Through modulating the generated high-voltage discharging current and converting the electric energy of the discharging current into the mechanical energy, the pulse fracturing device can be used for carrying out high-energy electric arc fracturing physical simulation tests, and the capability for manufacturing cracks in stratum rock (volcanics, sandstone, carbonate rocks and the like) with different rock characters is evaluated, so the basic parameters are provided for the application of the technology to oil and gas production increase sites. In addition, the pulse fracturing device does not need to consume water and various chemical additives, and has the characteristics of low damage, low energy consumption and the like.

Description

technical field [0001] The invention relates to the field of oil and gas stimulation, in particular to a pulse fracturing device and method. Background technique [0002] In the field of traditional oil and gas reservoir stimulation technology, hydraulic fracturing technology, as an important oil and gas stimulation measure, is widely used at home and abroad. The principle of oil and gas layer fracturing is to use the liquid to transmit the pressure, and the chemical liquid (fracturing fluid) with a certain viscosity is injected into the oil and gas layer along the wellbore with a high displacement by the fracturing train group, causing the rock in the formation to break, and then a certain scale is formed. Formation fractures, thereby increasing the production of oil and gas wells. This method has certain limitations, such as the need to consume a large amount of water resources, the injected chemical liquid (fracturing fluid) is likely to cause damage to the reservoir, th...

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Problems solved by technology

[0006] However, the existing arc pulse enhanced oil recovery technology can only create microscopic cracks in rocks due to the characteristics of low energy and low voltage, and cannot produce cracks of a certain scale, so it cannot achieve the goal of greatly increasing oil and gas production.

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