Monitoring device and experimental method for coal pulverized change in simulating coal seam fracturing
A technology of change monitoring and action, applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve problems such as large differences, large deviations, and inability to truly and effectively guide on-site drainage, so as to ensure integrity, even force effect
Active Publication Date: 2022-02-08
HENAN POLYTECHNIC UNIV
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Problems solved by technology
However, coalbed methane wells need to undergo reservoir reconstruction before drainage, and the mechanical properties of coal samples after reconstruction are quite different from those in the original state. This test method leads to a large deviation from the actual situation, and cannot really effectively guide on-site drainage.
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[0041] Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in further detail:
[0042] Such as Figure 1-11 As shown in Fig. 1, the device for monitoring changes in pulverized coal drainage during simulating coal seam fracturing, including fracturing confining pressure power system I, gas injection system II, fracturing test system III and computer IV; gas outlet of gas injection system II and fracturing test system The inlet port of system III is connected; the computer IV is respectively connected with the fracturing confining pressure power system I, the gas injection system II and the fracturing test system III through data lines;
[0043] The fracturing confining pressure power system I includes a fracturing fluid injection device and a confining pressure loading device. The outlet end of the fracturing fluid injection device is connected to the inlet end of the fracturing test system III through the fracturing pipe 1;...
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A monitoring device for simulating coal seam fracturing to discharge coal powder changes, including a fracturing confining pressure power system, a gas injection system, a fracturing test system and a computer; the gas outlet of the gas injection system is connected to the inlet of the fracturing test system; the computer It is respectively connected with the fracturing confining pressure power system, the gas injection system and the fracturing test system through data lines. The invention also discloses an experimental method of a monitoring device for coal dust discharge and mining changes by simulating coal seam fracturing. The invention has a reasonable design, injects pre-fluid, sand-carrying fluid, and displacement fluid into the fracturing pipe sequentially through the fracturing confining pressure power system, injects high-pressure gas into the ring holder through the gas injection system and confining pressure device, and adjusts the pressure of the high-pressure gas. The injection volume is connected to the fracturing confining pressure power system, gas injection system, confining pressure device, monitoring device, ring holder and fracturing pipe by controlling the computer to monitor different coal seam property parameters, different formation stress parameters, and different particle sizes. The output of pulverized coal produced under coal seam fracturing and simulated fracturing.
Description
technical field [0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a monitoring device and an experimental method thereof for simulating coal seam fracturing action to discharge and mine changes in coal powder. Background technique [0002] In order to develop my country's rich coalbed methane resources, Chinese coalbed methane workers have gradually formed "favorable blocks" after more than 30 years of basic theoretical research and exploration and development practices of coalbed methane on the basis of the successful experience of coalbed methane development in the United States and other countries. Under the guidance of the basic idea of coalbed methane exploration and development-optimization-drilling-fracturing-drainage and gas recovery, the annual production of ground coalbed methane in my country has increased from 100 million m3 in 2006 3 increased to 4.425 billion m in 2015 3 , the annual production of coalbed me...
Claims
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IPC IPC(8): E21B49/00E21B43/26E21B43/34
CPCE21B43/26E21B43/34E21B49/00
Inventor 倪小明李志恒吕闰生孙小婷
Owner HENAN POLYTECHNIC UNIV