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Explosion dynamic-load fracturing simulation test device

A simulation test and fracturing technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems that large-sized rock samples cannot be accommodated, cannot be used for explosive fracturing tests, etc., and achieve large sample size Effect

Inactive Publication Date: 2010-06-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the conventional rock mechanics triaxial test machine has this function, it can only be used for rock static tests
At the same time, to observe and study the formation, propagation and distribution of cracks in the surrounding rock of the well wall, large-scale rock samples must be used. However, due to the limitation of the frame-type loading structure of the conventional rock mechanics triaxial testing machine, it is impossible to accommodate large-scale rock samples. rock sample
Therefore, the rock mechanics triaxial test machine cannot be used for explosive fracturing tests

Method used

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Embodiment Construction

[0011] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0012] As shown in the figure, a lower pressure pad 4 is installed on the base 1 with grooves, and an oil inlet hole 20 is opened on the base 1. The oil inlet hole is connected to the hydraulic control system 21 with a high-pressure pipeline, and the base 1 is connected to the cylinder body of the pressure chamber. 6 is connected and fixed by the lower ferrule 2 and the snap ring 3. During the test, the sample is placed on the lower pressure pad 4 and positioned by the positioning pin 5. After the sample is placed, lead the explosive lead out from the lead hole 18 on the pressure chamber cylinder body 6 and connect it to the ignition control system 23. Connected to the data acquisition system 22. Place the upper pressure pad 7 and the upper pressure plate 8 on the sample in sequence. The positioning ring 9 and the positioning pad 10 arranged on the ...

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Abstract

The invention provides an explosion dynamic-load fracturing simulation test device mainly used for simulating the explosion fracturing process of an explosive in underground rock and comprising a high-pressure autoclave, a hydraulic control system, an ignition control system and a data acquisition system. The high-pressure autoclave is the main part of the whole test system and mainly comprises a base, a pressure chamber cylinder, a pressure gasket, a pressure plate, a pressure chamber upper cover, a ferrule, a clasp, a bidirectional piston, and the like; an oil cylinder and a bidirectional piston are mounted in the center of the pressure chamber upper cover, the pressure chamber upper cover can apply an axial load to a sample on a basis of confining pressure; the base and the bidirectional piston are provided with oil inlets which are connected with the hydraulic control system through high-pressure pipelines; the wall of the pressure chamber cylinder is provided with an explosive lead hole and a data wire lead hole which are respectively connected with the ignition control system and the data acquisition system by leads; and the pressure chamber upper cover and the base are respectively mounted at the upper end and the lower end of the pressure chamber cylinder and connected and fixed by the ferrule and the clasp so that the autoclave body has favorable high pressure resistance and can carry out a dynamic-load fracturing test on a large-size sample (the diameter of 800*800mm).

Description

Technical field: [0001] The invention relates to an indoor test device for rock mechanics, in particular to a test device for simulating explosive dynamic load fracturing in a borehole. Background technique: [0002] It is of great significance to study the explosive dynamic load fracturing technology in the wellbore for the development of low-permeability and low-abundance oil and gas reservoirs. The effect of explosive dynamic load fracturing on the formation rocks around the wellbore is a very complicated process. At present, the research on this aspect is mainly carried out from three aspects: theoretical analysis, numerical simulation and experimental research. Among them, experimental research occupies an important position, not only because it can provide first-hand information, but also can be used to confirm the results of theoretical analysis and numerical simulation. [0003] At present, the dynamic test of rock is mainly carried out by using the SHPB test device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
Inventor 程远方徐鹏张晓春
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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