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Deep well electric pulse fracturing device

An electric pulse and deep well technology, applied in wellbore/well components, production fluid, earthwork drilling and production, etc., can solve the problems of reservoir damage, huge energy consumption, unfavorable oil and gas stimulation, etc., and achieve the effect of low damage and low energy consumption

Inactive Publication Date: 2020-08-18
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of 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, is not conducive to oil and gas production increase, and consumes a lot of energy

Method used

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  • Deep well electric pulse fracturing device

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] Such as figure 1 , the present invention provides a deep well electric pulse fracturing device, which includes several parts including a ground control system, a deep well transmission cable, a high-voltage charging unit, an energy storage device, a discharge switch, and a transducer; the ground control system is located on the ground , The withstand voltage of feeder cables for wells is less than 600V, so the first stage output voltage of the ground control system is 600V, and the square wave voltage output is 1KHz. The ground control system adopts the inverter power scheme of PWM modulation mode, adjusts the duty cycle, and can adjust the charging time of the high-voltage charging power supply. The high-voltage charging circuit in the ground control system rectifies the mains power to generate 300V DC voltage, which is converted into a 1kHz PWM-modu...

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Abstract

The invention provides a deep well electric pulse fracturing device. The deep well electric pulse fracturing device comprises several parts such as a ground control system, a deep well transmission cable, a high-voltage charging unit, an energy storage device, a discharge switch and a transducer; the ground control system is located on the ground, and then after being boosted by the own system tothe highest voltage of the deep well cable, the ground control system is connected with a high-frequency and high-voltage transformer of the high voltage charging unit through the deep well cable. Thehigh-voltage charging unit is responsible for charging the energy storage device. After the energy storage device is charged, the energy of the energy storage device is transmitted to a water mediumthrough the high-voltage discharge switch and the discharge transducer, and the electrical discharge arc energy in the water medium generates high-temperature gas and high-temperature plasma, the materials expand rapidly, and powerful shock wave energy is generated and diffused to the surrounding rock mass. The deep well electric pulse fracturing device has the characteristics of low energy consumption and low damage, and has good prospects.

Description

technical field [0001] The invention belongs to the field of oil and gas stimulation, in particular to a deep well electric pulse fracturing device. Background technique [0002] In the field of traditional oil and gas reservoir stimulation technology, hydraulic fracturing technology is widely used at home and abroad as an important oil and gas stimulation measure, but it needs to consume a lot of water resources; the principle of oil and gas reservoir fracturing is to use liquid to transmit pressure The effect is to use a fracturing train to inject a chemical liquid (fracturing fluid) with a certain viscosity into the oil and gas layer along the wellbore at a high displacement, causing the rock in the formation to break, and then forming a certain scale of formation fractures, thereby increasing the production of oil and gas wells. This type of method has certain limitations, such as the need to consume a large amount of water resources, the injected chemical liquid (fractu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 魏亚然谭渝苏莘
Owner CHINA UNIV OF MINING & TECH
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