Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores

doi:10.3390/en13174557

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	Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores
	Han GF(韩国锋)1 ; Liu XL2 ; Huang J2
通讯作者	Liu, Xiaoli(xiaoli.liu@tsinghua.edu.cn)
发表期刊	ENERGIES
	2020-09-01
卷号	13 期号:17 页码:21
摘要	Various pulse decay methods are proposed to test tight cores. These methods can be divided into three types. This study compares the performance of these methods to test the permeability of unconventional cores in terms of homogeneous cores, dual-medium cores, and gas adsorption, including the pressure equilibrium time, possible errors caused by conventional analysis methods, and reflections on the characteristics of dual-media. Studies shows that the two test methods with an antisymmetric relationship in the boundary conditions have basically identical test performance. When testing homogeneous cores, regardless of whether the gas is adsorptive or not, the pressure equilibrium time of the first type of method is approximately half of that of the second type of method. The dual-medium parameters seriously affect the pressure equilibrium time of different methods, which may cause the difference of order of magnitude. For homogeneous cores, the permeability errors of the first and second types of methods caused by porosity errors are similar and larger than that of the third type of method. For dual media, the fracture permeability obtained by the third type of method using the conventional analysis method may differ from the actual value by tens of times. No method can significantly eliminate the sorption effect. When the core is a dual-medium, only the pressure curves of the upstream positive-pulse method, downstream negative-pulse method and one-chamber method can reflect the characteristics of dual media. The pressure derivative of the one-chamber method cannot reflect the characteristics of dual media at the early time. The pressure derivative of the second type and the upstream positive-pulse downstream negative-pulse method can reflect the complete characteristics of dual media, but their pressure derivative of the constant-slope segment is small, and the interporosity flow parameter may not be identified.
关键词	pulse decay method gas adsorption dual media unconventional core
DOI	10.3390/en13174557
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000571134500001
关键词[WOS]	MULTISCALE GAS-TRANSPORT ; DUAL-CONTINUUM MEDIUM ; PERMEABILITY ; SHALES ; ROCKS ; FLOW
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
资助项目	National Natural Science Foundation of China[11602276] ; National Key R&D Program of China[2018YFC1504801] ; National Key R&D Program of China[2018YFC1504902]
项目资助者	National Natural Science Foundation of China ; National Key R&D Program of China
论文分区	Q3
力学所作者排名	1
RpAuthor	Liu, Xiaoli
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85301
专题	流固耦合系统力学重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Han GF,Liu XL,Huang J. Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores[J]. ENERGIES,2020,13,17,:21.
APA	韩国锋,Liu XL,&Huang J.(2020).Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores.ENERGIES,13(17),21.
MLA	韩国锋,et al."Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores".ENERGIES 13.17(2020):21.

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