Investigation of the mechanism of secondary microcrack growth in rocks with native microdefects

doi:10.1016/j.petrol.2022.110898

IMECH-IR > 流固耦合系统力学重点实验室

	Investigation of the mechanism of secondary microcrack growth in rocks with native microdefects
	Zheng SP(郑思平)1,2; Lin M(林缅)1,2 ; Jiang WB(江文滨)1,2 ; Zhao J(赵京)1 ; Qiu X(邱鑫)1,2; Chen Z(陈卓)1,2
通讯作者	Lin, Mian(linmian@imech.ac.cn)
发表期刊	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
	2022-10-01
卷号	217 页码:19
ISSN	0920-4105
摘要	Exploring secondary microcracks (SMC) growth during hydraulic fracturing in rocks with native microdefects is a challenging task in unconventional oil and gas exploitation. The effect of native microdefects on the SMC growth currently remains unclear. In this study, conceptual models by discrete element method (DEM) are established for rocks with the native microdefects assuming to be micropores (MP) and microfractures (MF), respectively. Based on the benchmark simulation, the influence of oriental relationship between microdefects and tensile stress on the cracking process is summarized. Furthermore, we investigate the effects of MP and MF on the growth of SMC during the Brazilian splitting loading. The results show that the cluster trend of SMC in the spindle-shaped zone becomes more significant with increasing microdefect densities. Torsion SMC appear outside the zone in the highly dense MP model, which does not occur in the MF model. The central part of MF model induces more SMC than the MP model under the same horizontal tensile stress. The SMC growth is controlled by both microdefect densities and spring stiffness ratios, but the latter could be ignored for the microdefect density over 0.041 (MP) and 0.324 (MF), respectively. The numerical experiments reveal the mechanism of SMC growth in rocks with native microdefects under the tensile stress.
关键词	Microdefects Brazilian splitting experiment Secondary microcrack (SMC) Growth mechanism Discrete element method (DEM)
DOI	10.1016/j.petrol.2022.110898
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000847579600001
关键词[WOS]	TENSILE-STRENGTH ; FRACTURE ; FAILURE ; SANDSTONE ; BEHAVIOR ; DISCS
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Petroleum
资助项目	National Natural Science Foundation of China[41690132] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010304] ; National Nat-ural Science Foundation of China[41872163]
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Nat-ural Science Foundation of China
论文分区	一类
力学所作者排名	1
RpAuthor	Lin, Mian
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90010
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.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zheng SP,Lin M,Jiang WB,et al. Investigation of the mechanism of secondary microcrack growth in rocks with native microdefects[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2022,217:19.
APA	郑思平,林缅,江文滨,赵京,邱鑫,&陈卓.(2022).Investigation of the mechanism of secondary microcrack growth in rocks with native microdefects.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,217,19.
MLA	郑思平,et al."Investigation of the mechanism of secondary microcrack growth in rocks with native microdefects".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 217(2022):19.

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