High-temperature ultralow permeability measuring instrument
An ultra-low permeability, measuring instrument technology, applied in permeability/surface area analysis, measuring devices, scientific instruments, etc., can solve the problems of high temperature and ultra-low permeability measurement and high manufacturing costs, and achieve low development costs and reliability. High performance and simple overall structure
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[0019] Example 1:
[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings:
[0021] A high-temperature ultra-low permeability measuring instrument ( figure 1 ), it consists of three-axis pressure chamber, displacement sensor 11, hydrostatic pressure loading pump 13 and bias loading pump 12, constant flow / constant pressure control pump 14, small volume gas storage tank 15, medium volume gas storage tank 16, large volume It is composed of gas storage tank 17, pore pressure sensor 19, upstream and downstream pore pressure deviation sensor 20, oil pressure sensor 21, temperature sensor 23, high temperature control box 22, and data acquisition system 24. The connection relationship is: the three-axis pressure chamber is connected to the hydrostatic pressure loading pump 13 and the bias loading pump 12 through the oil pipeline, and connected to the constant current / constant pressure control pump 14 through the gas pipeline. ...
Example Embodiment
[0027] Experimental example 1:
[0028] The device was used to measure the permeability of mudstone. The test plan is to apply 12MPa hydrostatic pressure to a cylindrical sample with a height of 76mm and a diameter of 38mm, and the temperature is controlled at 60°C, and then the permeability is measured. The test results show that it takes 15 minutes to load the temperature from room temperature to 60°C, the temperature of the entire system is constant at 60.2°C, and the temperature fluctuation is less than 0.2°C. After the hydrostatic pressure is loaded, the constant current / constant pressure control pump (ISCO 500D) is used. Pressurize the gas storage tank of the smallest container, and then implement pulse measurement. After 12 hours, the system pressure stabilizes and the measured permeability is 10 -22 m 2 .
[0029] In order to accurately measure, leak test the equipment. For a metal sample with a diameter of 38mm and a height of 76mm, the impulse method was used to conduc...
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