Device for explosive fracturing simulation experiment of horizontal well and application of device

A technology for simulating experiments and horizontal wells, which is used in measurement devices, preparation of samples for testing, and testing of material strength by applying stable tension/pressure. Achieve the effect of obvious effect, precise experimental control operation and good experimental effect

Active Publication Date: 2017-07-14
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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  • Device for explosive fracturing simulation experiment of horizontal well and application of device
  • Device for explosive fracturing simulation experiment of horizontal well and application of device
  • Device for explosive fracturing simulation experiment of horizontal well and application of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0037] Among them, the rock sample clamping device includes a cylindrical cylinder (1-15), the cylinder is horizontally arranged, and the bottom of the cylinder bottom is provided with two support seats (1-11) for supporting the cylinder, and the two cylinders The end is provided with a left core plug and a right core pl...

Embodiment 2

[0043] A device for horizontal well deflagration fracturing simulation experiment. The structure is as described in Example 1. The difference is that the rubber sleeve (1-17) also passes through four equally spaced internal support seats (1- 16) Fixed in the inner cavity of the cylinder (1-15). The inner support seat is mainly used for reinforcement, providing greater support for the rubber sleeve, and avoiding the overweight experimental core from crushing the rubber sleeve.

Embodiment 3

[0045] An operating method for deflagration and fracturing simulation experiments of horizontal wells, using the device described in Example 2. The specific operating process is as follows:

[0046] (1) According to the experimental requirements, make rock samples with different lithology, dry the prepared rock samples and use a core drilling machine to drill the cores, and then polish the cores. After the polishing treatments, the prepared cores Saturation treatment.

[0047] (2) Put the rubber sleeve (1-17) on the left core plug (1-12) where the thread is not engraved, install the wire mesh sleeve (1-18) in the rubber sleeve, and put this whole 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 wire mesh sleeve (1-18) and put it on the other end of the rubber sleeve (1-17) Put the upper right core plug (1-2), and then install the tightening steel rings (1-6) at both ends, and then inst...

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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 for deflagration fracturing simulation experiment of a horizontal well and its application, and belongs 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, due to many types of reservoirs and poor permeability, most low-permeability reservoirs are difficult to produce. For this type of reservoir, deflagration fracturing in horizontal wells has great advantages compared with other fracturing methods: short action time, helps to communicate man-made fractures with natural fractures near the well, and has fewer operating restrictions, Low pollution and low construction cost. In summary, horizontal well deflagration ...

Claims

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Application Information

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Patent Type & Authority Applications(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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