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A device used in horizontal well deflagration fracturing simulation experiment and its application

A technology for simulation experiments and horizontal wells, applied in the direction of measurement devices, preparation of test samples, and application of stable tension/pressure to test the strength of materials, etc., which can solve problems such as research lag, restricted applications, and inability to pressurize core holes. Achieve obvious effects, precise experimental control operation, and good experimental results

Active Publication Date: 2019-09-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unique structure of the horizontal well itself determines that the deflagration fracturing technology of the horizontal well is different from that of the vertical well. Lag, restricting the application of this technology in oilfield
[0006] At present, the research on the relative strain of the rock after being subjected to an instantaneous impact is mainly realized through the Hopkinson pressure bar (SHPB) experiment and related vertical damage devices. The rock core is impacted in the vertical direction, and the horizontal impact on the core cannot be realized

Method used

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  • A device used in horizontal well deflagration fracturing simulation experiment and its application
  • A device used in horizontal well deflagration fracturing simulation experiment and its application
  • A device used in horizontal well deflagration fracturing simulation experiment and its application

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Embodiment 1

[0036] Such as Figure 1 to Figure 3 As shown, this embodiment provides a device for deflagration and fracturing simulation experiments in horizontal wells. The device mainly includes three parts: a rock sample clamping device, an impact loading device and a control analysis device; the rock sample clamping device is used to place For rock cores with different characteristics, the impact loading device is used to provide external force loading to the rock sample holding device to make the cores in different horizontal impact simulation environments, and the control analysis device is used to analyze various data of the rock cores in different simulation environments.

[0037]Wherein, the rock sample clamping device comprises a cylindrical cylinder body (1-15), and the cylinder body is placed horizontally, and the bottom of the cylinder bottom is provided with two supporting seats (1-11) for supporting the cylinder body, and the The end is provided with a left core plug and a r...

Embodiment 2

[0043] A device used for deflagration fracturing simulation experiments in horizontal wells, the structure is as described in Example 1, the difference is that the rubber sleeve (1-17) also passes through four equally spaced inner support seats (1-17) 16) It is fixed in the inner cavity of the cylinder body (1-15). The inner support seat is mainly used as a reinforcement to provide greater support for the rubber sleeve and prevent the rubber sleeve from being crushed by the heavy experimental core.

Embodiment 3

[0045] A kind of operation method that is used for horizontal well deflagration fracturing simulation experiment, utilizes the device described in embodiment 2, concrete operation process is as follows:

[0046] (1) According to the experimental requirements, make rock samples of different lithology, use the core drilling machine to drill the rock cores after drying the rock samples, and then grind the rock cores. After grinding, the rock cores made saturation treatment.

[0047] (2) Put the rubber sleeve (1-17) on the unthreaded part of the left core plug (1-12), install the steel wire mesh sleeve (1-18) in the rubber sleeve, put this whole into In the inner cavity of the cylinder, when the left core plug is in contact with the inner support seat (1-16), put the experimental core into the steel wire mesh sleeve (1-18), and put it on the other end of the rubber sleeve (1-17). Put on the right core plug (1-2), then install the tightening steel rings (1-6) at both ends, then in...

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Abstract

The invention relates to a device for an explosive fracturing simulation experiment of a horizontal well and an application of the device. The device comprises a rock sample clamping device, an impact loading device and a control analysis device, wherein the rock sample clamping device comprises a cylinder body; rock cores of different characteristics can be put into the cylinder body; a hole inner pressure inlet, a confining pressure inlet, a confining pressure relief opening, an air outlet and a seepage channel outlet; the impact loading device comprises an ultrasonic generator, a transducer, an amplitude-change pole and an impact hammer; the impact hammer is controlled to impact a movable plunger at one end of the cylinder body through a computer and the ultrasonic generator; and impact force is loaded to the rock cores in the cylinder body, confining pressure is loaded through the confining pressure inlet and inner pressure is loaded through the hole inner pressure inlet. The device can be used for exploring damage responses of explosion impact in a horizontal wellbore to the rock cores of different lithologic characters and lengths, meanwhile, accurate experiment control operation can be achieved, effective data analysis and statistics can be carried out, so that the experiment effect is good and the action is obvious.

Description

technical field [0001] The invention relates to a device used for a horizontal well deflagration fracturing simulation experiment and its application, belonging to the technical field of oil and gas well development. Background technique [0002] With the development of my country's oil and gas exploration and development, my country's oil and gas development has gradually shifted its focus to low-permeability reservoirs. Low-permeability reservoirs are widely distributed in my country and have abundant reserves. However, most of the low-permeability reservoirs are difficult to produce due to various types of reservoirs and poor permeability. For such reservoirs, deflagration fracturing in horizontal wells has great advantages compared with other fracturing methods: short action time, helps to communicate artificial fractures with natural fractures near the wellbore, less operational restrictions, Less pollution and lower construction cost. In summary, horizontal well defl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12G01N15/08G01N1/28
Inventor 吴飞鹏刘静刘恒超刘杨李旭李悦静谭鑫宇蒲春生
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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