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Experimental device for promoting gas flowing with ultrasonic waves

An experimental device, ultrasonic technology, applied in the direction of measuring device, permeability/surface area analysis, instruments, etc., can solve the problems restricting the application of ultrasonic technology, and achieve the effect of large recovery rate and optimized technical means

Inactive Publication Date: 2015-08-05
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, there is currently no relatively complete experimental device that can deeply analyze the mechanism of ultrasonic technology improving coal reservoir conditions, which restricts the application of ultrasonic technology in coalbed methane wells

Method used

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  • Experimental device for promoting gas flowing with ultrasonic waves
  • Experimental device for promoting gas flowing with ultrasonic waves

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Embodiment Construction

[0025] Such as figure 1 As shown, an experimental device for ultrasonically promoting gas seepage, the core holder is used to place the core; the constant temperature control module provides constant temperature conditions for the core holder, and can also provide a condition for the core holder to change according to a predetermined temperature; The gas collection and pressurization module is connected to one end of the core in the core holder, and the other end of the core is connected to the vacuum module; an ultrasonic loading module is arranged around the core holder, and a vibration detection module is connected to the core holder; measurement and data acquisition The module is used to collect core axial pressure, confining pressure and gas inlet pressure and velocity.

[0026] The following combination figure 1 and figure 2 The structure of the experimental device for ultrasonic-facilitated gas percolation proposed in the embodiment of the present invention will be f...

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Abstract

The invention discloses an experimental device for promoting gas flowing with ultrasonic waves. The experimental device comprises a rock core holding unit, a constant-temperature regulating module and an axial load and confining pressure module, wherein a rock core inside the rock core holding unit is connected with a gas gathering and pressurizing module and a vacuumizing module; an ultrasonic loading module is arranged around the rock core holding unit which is connected with a vibration detection module; the experimental device further comprises a measuring and data acquisition module which is used for acquiring the axial load and the confining pressure of the rock core and the pressure and speed at a gas inlet. The experimental device for simulating the gas flowing rules of coalbed methane in immediate vicinity of wellbore under ultrasonic loading is capable of providing different temperatures and experimental conditions under three-axis stress states; ultrasonic fields with different frequencies and different power are respectively loaded in a vertical flowing direction, a down-flowing direction and a reverse flowing direction; impacts of an ultrasonic and mechanical vibration and a thermal effect to the gas flowing can be separated through a water-bath constant-temperature module; an impact of single factors such as mechanical vibration and thermal effect to the flowing can be simulated.

Description

technical field [0001] The invention relates to the technical field of coalbed methane exploration and development, in particular to an experimental device for promoting gas percolation by ultrasonic waves. Background technique [0002] At present, the traditional coalbed methane development technology is mainly hydraulic fracturing technology, but due to the complex geological conditions in my country, the single well production of coalbed methane is not high, and the coalbed methane development technology is not suitable for the geological conditions of coal reservoirs. At the same time, the injection of fracturing fluid into the coal seam will cause permanent damage to the coal reservoir, which is also an important reason for the low production of CBM single wells. Therefore, the development of new development technology has become another development direction to break through the "bottleneck" of CBM development. The permeability of coal reservoirs in my country is low,...

Claims

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Application Information

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IPC IPC(8): G01N13/04G01N15/08
Inventor 秦勇师庆民申建杨兆彪吴财芳陈义林兰凤娟屈争辉
Owner CHINA UNIV OF MINING & TECH
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