Simulation Analysis of the Characteristics of Layered Cores during Pulse Decay Tests

doi:10.3390/pr12010146

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Simulation Analysis of the Characteristics of Layered Cores during Pulse Decay Tests
	Chen, Haobo; Liu, Yongqian; Cheng PD(程鹏达); Zhu XG(朱心广); Han GF(韩国锋)
刊名	PROCESSES
	2024
卷号	12 期号:1 页码:23
关键词	pulse decay testing layered cores simulation analysis low permeability
DOI	10.3390/pr12010146
通讯作者	Cheng, Pengda(pdcheng@imech.ac.cn) ; Han, Guofeng(hanguofeng@imech.ac.cn)
英文摘要	The permeability of low-permeability cores is generally measured using a pulse decay method. The core of low-permeability rocks, such as shale, often has a layered structure. The applicability of pulse decay testing for layered cores is not clear. In this study, the performance of the pulse decay method on layered cores was comprehensively investigated. Numerical simulations were conducted to investigate the influence of the interlayer permeability ratio, storativity ratio, layer thickness, interlayer location, and number of layers on the pulse decay pressure and pressure derivative curves, as well as the permeability obtained from pulse decay testing. The results revealed that the pressure curves of layered cores exhibit distinct differences from those of homogeneous cores if the upstream permeability is larger than the downstream one. The pressure derivative curve shows more inclined or horizontal straight-line segments than in the homogeneous case. The shapes of the pressure and pressure derivative curves are affected by the upstream and downstream positions of the core, but the tested permeability is not affected. The tested permeability differs from the equivalent model permeability, with an error of up to 22%. If the number of layers is not less than 10, the permeability obtained from the pulse decay test is consistent with that of the equivalent model. These differences are influenced by the interlayer permeability ratio, storativity ratio, layer thickness, interlayer location, and number of layers. To improve the accuracy of permeability analysis in pulse decay testing for layered cores, curve fitting using the characteristics of the pressure derivative curve can be employed.
分类号	二类
资助项目	Beijing Natural Science Foundation
WOS关键词	DUAL-CONTINUUM MEDIUM ; PERMEABILITY ; TRANSPORT ; SHALES ; ROCKS ; FLOW
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:001150916300001
资助机构	Beijing Natural Science Foundation
其他责任者	Cheng, Pengda ; Han, Guofeng
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94246]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
推荐引用方式 GB/T 7714	Chen, Haobo,Liu, Yongqian,Cheng PD,et al. Simulation Analysis of the Characteristics of Layered Cores during Pulse Decay Tests[J]. PROCESSES,2024,12(1):23.
APA	Chen, Haobo,Liu, Yongqian,程鹏达,朱心广,&韩国锋.(2024).Simulation Analysis of the Characteristics of Layered Cores during Pulse Decay Tests.PROCESSES,12(1),23.
MLA	Chen, Haobo,et al."Simulation Analysis of the Characteristics of Layered Cores during Pulse Decay Tests".PROCESSES 12.1(2024):23.