Detonation gas rock breaking experimental device and method

Abstract

The invention belongs to the technical field of petroleum engineering, and relates to a detonation gas rock breaking experimental device and method. The detonation gas rock breaking experimental device is characterized in that: two upper cover plates are arranged at the upper end of a cylinder body; an upper piston is mounted below each upper cover plate; lower cover plates are arranged at the lower end of the cylinder body; a lower piston is mounted above each lower cover plate; a sample is placed between each upper piston and the corresponding lower piston; a sample central hole is formed between the samples; compression bolts are arranged on the upper cover plates; compression bolts and pressure measurement bolts are arranged on the lower cover plates; a water injection hole is formed in the top end of one upper cover plate; an ignition element assembly is mounted in the middle of the cylinder body, and sequentially penetrates through the upper cover plates, an upper piston central hole, the sample central hole and a lower piston central hole; a pressure measurement sensor is arranged at the bottom end of the ignition element assembly, and is mounted in the lower cover plates in an embedded manner; supporting rods are mounted at the bottoms of the lower cover plates. According to the detonation gas rock breaking experimental device and method, the structure is simple, the theory is scientific, the operation is convenient, and the experimental data is accurate.

Description

Technical field: [0001] The invention belongs to the technical field of petroleum engineering, and relates to an experimental device and method for blasting gas to break rocks. By simulating the damage and destruction effect of blasting gas on rocks, the action mechanism and damage law of blasting gas on well wall rocks are studied. Background technique: [0002] The most basic feature of unconventional oil and gas reservoirs is that the natural seepage capacity of the formation is poor, and it needs to be reformed for economical and effective development. At present, the methods used to stimulate unconventional oil and gas reservoirs include two categories, one is static loading on the formation, the most prominent representative is hydraulic fracturing technology; the other is dynamic loading on the formation, such as high-energy gas fracturing, explosion technology, etc. In recent decades, hydraulic fracturing technology has been widely studied and applied, but because th...

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Problems solved by technology

For the explosive gas acting on the wellbore rock, the column hole impact test is an easy-to-implement research method. The document "DavidW. Realize impact, the load waveform is easy to control, but the load waveform of water impact is different from that of explosive gas, the loading rate of water impact is lower than that of explosive gas, and there is no influence of temperature changes caused by explosion, its effect cannot be accurately reflected Load waveform of explosive gas

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