Physical experiment box for gas extraction of multi-branch horizontal well
A gas drainage and physical experiment technology, applied in the direction of mining fluid, earth drilling, wellbore/well components, etc., can solve the problems of deviation of experimental results, failure to achieve simulation, failure to guarantee original rock stress field and gas seepage field, etc. , to achieve the effect of simple operation
Inactive Publication Date: 2020-01-17
TAIYUAN UNIV OF TECH
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Problems solved by technology
[0003] Coal seam gas control and utilization are quite difficult, and there are many key problems in theoretical and technical research, especially in the experimental aspect, it is impossible to guarantee that the research object and environment are the real original rock stress field and gas seepage field, which affects the experimental results. Causes a large deviation and cannot achieve a true "simulation"
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[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0027] The physical experiment box described in the embodiment of the present invention is applied to such as figure 1 In the shown multi-branch horizontal well coal seam gas drainage physical simulation experiment system, the system includes a test piece forming system, an experiment box, a gas supply system, a drainage system and a data acquisition system.
[0028] Such as figure 1 As shown, the specimen forming system includes a fixed beam 1, a hydraulic cylinder 2, a pillar 3, a forming pressure head 4, a workbench 5, a hydraulic power mechanism 6, a console 7, an oil pipe 8, and an integrated cable 9; A plurality of pillars 3 support a fixed beam 1, and a hydraulic cylinder 2 is installed on the bottom of the fixed beam 1, and is further fixed by a fixed plate 11 installed on the pillar 3, and a forming pressure head 4 is installed at th...
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The invention discloses a physical experiment box for gas extraction of a multi-branch horizontal well. The physical experiment box comprises an overall part, a pressure sensor sealing structure and atemperature sensor sealing structure. The overall part comprises a box, a box cover plate, a sealing groove, a gas injection hole, a data acquisition hole and an extraction hole. A pressure monitoring part comprises a pressure sensor, a data acquisition pipe, a stainless steel ferrule joint and a sealing rubber ring. A temperature monitoring part comprises a paperless recorder, a thermocouple temperature measurement wire, a stainless steel ferrule joint, a data acquisition pipe, a sealing rubber ring, epoxy resin and a temperature sensor. Through the physical experiment box, the change rule of coal seam pore pressure and temperature in the gas extraction process can be studied, so that the coal seam state is monitored in real time. A binary or multiple gas injection displacement experiment can also be conducted through gas holes preformed in the front and rear portions of the box correspondingly, and the gas component and concentration change of an extraction opening is monitored in real time.
Description
technical field [0001] The invention belongs to the field of coal seam gas drainage experiments, in particular to a physical experiment box used for gas drainage of multi-branched horizontal wells. Background technique [0002] Coalbed methane is a potential clean energy source. Under the current situation of energy shortage, accelerating the development and utilization of coalbed methane has important practical significance for improving my country's energy structure, realizing full utilization of energy and reducing environmental pollution. Although my country is rich in coalbed methane resources, coalbed methane mostly occurs in coalfields with complex geological structures and various forms. The most common methods of coalbed methane development are underground gas extraction and surface drilling. Due to the principle of safe production, the utilization rate of coalbed methane in most coal mines is low. In order to ensure the recoverability of coalbed methane and obtain ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21B43/00E21B43/16E21B47/00E21B47/06E21B47/07
CPCE21B43/006E21B43/168E21B47/00E21B47/06
Inventor 王雪峰范楠邓存宝郭晓阳陈曦郝朝瑜王延生
Owner TAIYUAN UNIV OF TECH