多孔介质气体渗透率测试理论、方法、装置及应用

doi:10.13722/j.cnki.jrme.2020.0095

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Abstract In the fields of deep energy exploitation and waste storage，permeability is an important indicator. The test method，fluid phase and temperature fluctuation will influence the accurate measurement of the permeability. In this study，the steady-state permeability models based on the inlet/outlet pressure and flow rate were derived and summarized. It was revealed that the results based on the inlet/outlet pressure are quite different while the results based on the inlet/outlet flow rate are relatively close. The reasons for the difference were thereby discussed. In addition，the suggestions for the selection of four steady-state and transient methods were elucidated by comparing the test results of steady-state and transient methods pressure decay. Water，alcohol and gas were selected to investigate the impact of different fluids on permeability test results. It is found that the gas permeability test in low permeability media is sensitive to the temperature fluctuation. To solve this problem，a model based on the temperature fluctuation elimination theory was proposed. Finally，the effects of the confining pressure，the axial pressure，the water saturation and the temperature on permeability evolution were demonstrated and analyzed through the applications in diverse fields，verifying the adaptability of the test theory，method and experimental device. The research work provides a basis for the selections of permeation test methods and fluid phases.

Key words： rock mechanics gas permeability steady-state method pulse-test method Darcy law temperature effect

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	Articles by authors
	LIU Jiangfeng1
	NI Hongyang1
	PU Hai1
	HUANG Bingxiang2
	YAO Qiangling2
	MAO Xianbiao1

Cite this article:

LIU Jiangfeng1,NI Hongyang1,PU Hai1, et al. Test theory，method and device of gas permeability of porous media and the application[J]. , 2021, 40(1): 137-146.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0095 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I1/137

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