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Down-hole hydraulic power pulse staged fracturing permeability-increasing device and method

A hydraulic pulse and staged fracturing technology, which is applied in the direction of wellbore/well valve device, earthwork drilling, wellbore/well components, etc.

Active Publication Date: 2015-09-23
CHONGQING INST OF GEOLOGY & MINERAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there is no hydraulic pulse fracturing method specifically for shale reservoirs at home and abroad.

Method used

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  • Down-hole hydraulic power pulse staged fracturing permeability-increasing device and method
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  • Down-hole hydraulic power pulse staged fracturing permeability-increasing device and method

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Embodiment Construction

[0037] The above is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] refer to figure 1 , The downhole hydraulic pulse fracturing staged permeability enhancement device includes a downhole pulse fracturing device 13 , a controllable hydraulic packer 14 , a coiled tubing 15 , a fluid control valve and a fracturing vehicle 16 . The fracturing vehicle 16 is connected to the downhole pulse fracturing device 13 and the controllable hydraulic packer 14 through the coiled tubing 15, and the controllable hydraulic packer 14 is arranged at the back end of the downhole pulse fracturing device 13 and at the interface of the coiled tubing 15 Set fluid control valve.

[0039] refer to Figure 2-Figure 5 , The downhole pulse fracturing device is mainly ...

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Abstract

The invention discloses a down-hole hydraulic power pulse staged fracturing permeability-increasing device and method. The device comprises a down-hole pulse fracturing device, a controllable hydraulic packer, a continuous oil pipe, a fluid control valve and a fracturing truck. The fracturing truck is connected with the controllable hydraulic packer and the down-hole pulse fracturing device through the continuous oil pipe. The controllable hydraulic packer is connected to the back end of the down-hole pulse fracturing device. The fluid control valve is arranged at the connecting opening of the continuous oil pipe. The down-hole pulse fracturing device comprises a first cylinder body, a second cylinder body, a mandrel, a sliding sleeve, a sealing ring, a spring, a nozzle and the like. Under the condition that certain construction parameters such as pumping pressure and displacement are provided for the ground fracturing truck, large-displacement low-frequency pulse fluid is generated at the shaft bottom and is injected in, and a water hammer effect is formed. The down-hole hydraulic power pulse staged fracturing permeability-increasing device is simple in structure, durable and easy to adjust, low-frequency large-displacement pulse energy can be generated, the construction technology is simple, pulse energy can be well used for breaking rocks, net-shaped complex cracks with wide extending ranges are generated, and reservoir stratum permeability is effectively improved.

Description

technical field [0001] The invention relates to a device and method for generating low-frequency, large-displacement, high-energy hydraulic pulse energy downhole, which is applied to shale reservoirs or other similar reservoir volume fracturing reforms. Background technique [0002] my country has abundant reserves of unconventional gas resources and great potential for development, especially shale gas and coalbed methane have broad development prospects. However, shale gas and coalbed methane reservoirs have the characteristics of low porosity and low permeability, and generally need to be transformed for commercial development. At present, hydraulic fracturing technology is one of the key technologies for the efficient and low-cost development of shale gas and coalbed methane. At the same time, there are bottleneck problems such as large water consumption, low energy utilization rate, and unsatisfactory fracture network communication effect. Hydraulic pulse fracturing is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B34/08
Inventor 李少荣陆朝晖贺培程礼军张健强潘林华张义
Owner CHONGQING INST OF GEOLOGY & MINERAL RESOURCES
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