Experimental Investigation on Permeability Evolution of Dolomite Caprock under Triaxial Compression

doi:10.3390/en13246535

	Experimental Investigation on Permeability Evolution of Dolomite Caprock under Triaxial Compression
	Xu, Deng 1; Liu, Jianfeng 1,4; Wu, Zhide 4; Wang, Lu 1; Liu, Hejuan 3; Xiao, Fukun 2; Zeng, Yin 1; Lyu, Cheng 1
刊名	ENERGIES
	2020-12-01
卷号	13 期号:24 页码:12
关键词	dolomite confining pressure effect permeability characteristics acoustic emission
DOI	10.3390/en13246535
英文摘要	In order to study the influence of different confining pressures on the stability and airtightness of dolomite underground gas storage, a permeability test under hydrostatic confining pressure, conventional triaxial compression test and gas-solid coupling test under triaxial compression were carried out on MTS815 test machine. During the tests, an acoustic emission (AE) monitoring system was also employed to estimate the rock damage. The experimental results showed that the relationships between permeability, porosity and hydrostatic confining pressure were exponential function and power function, respectively. Increasing confining pressure reduced the porosity and permeability of dolomite, and increased its triaxial compressive strength, but the addition of nitrogen reduced the compressive strength of dolomite by 10 similar to 30%, the higher the confining pressure, the smaller the difference. Compared with the maximum permeability under 15 MPa, confining pressure in the gas-solid coupling experiment, the maximum permeability under confining pressure of 30, 45, and 60 MPa is reduced by 42.0%, 84.4%, and 97.9%, respectively. In addition, the AE activity of dolomite decreases significantly with the increase in confining pressure, which also delayed the arrival of the AE active period.
资助项目	National Natural Science Foundation of China[51874202]
WOS研究方向	Energy & Fuels
语种	英语
出版者	MDPI
WOS记录号	WOS:000602868900001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25341]
专题	中科院武汉岩土力学所
作者单位	1.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China 2.Heilongjiang Univ Sci & Technol, Heilongjiang Ground Pressure & Gas Control Deep M, Harbin 150022, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Expt Geotech Mech & Engn, Wuhan 430071, Peoples R China 4.CNPC Key Lab Oil & Gas Underground Storage Engn, Langfang 065007, Peoples R China
推荐引用方式 GB/T 7714	Xu, Deng,Liu, Jianfeng,Wu, Zhide,et al. Experimental Investigation on Permeability Evolution of Dolomite Caprock under Triaxial Compression[J]. ENERGIES,2020,13(24):12.
APA	Xu, Deng.,Liu, Jianfeng.,Wu, Zhide.,Wang, Lu.,Liu, Hejuan.,...&Lyu, Cheng.(2020).Experimental Investigation on Permeability Evolution of Dolomite Caprock under Triaxial Compression.ENERGIES,13(24),12.
MLA	Xu, Deng,et al."Experimental Investigation on Permeability Evolution of Dolomite Caprock under Triaxial Compression".ENERGIES 13.24(2020):12.