Explosion dynamic-load fracturing simulation test device

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...

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

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