On faults induced stress shielding to account for the formation of deep-buried reservoirs

doi:10.1007/s10409-024-24240-x

IMECH-IR > 非线性力学国家重点实验室

	On faults induced stress shielding to account for the formation of deep-buried reservoirs
	Zeng, Xiaguang ; Zhu, Guangyou ; Zhao, Bin ; Wen JC(温济慈)
发表期刊	ACTA MECHANICA SINICA
	2025-04
卷号	41 期号:4 页码:424240
ISSN	0567-7718
摘要	It is commonly accepted that the formation of oil and gas reservoirs in deep-buried strata is almost impossible due to the huge compaction of in-situ crustal stresses. Nevertheless, recent hydrocarbon explorations in the Tarim Basin have discovered reservoirs at depths exceeding 8 km. The reservoirs exhibit a strong correlation to the strata's faults and large fractures, yet the precise underlying mechanical mechanism remains obscure. To illuminate how the faults may facilitate the existence of such deep-buried reservoirs, we consider three ideal scenarios involving unconventional hole-crack interactions under remote biaxial compression. Our focus is on the stress concentration of the hole, influenced by the long main cracks. Closed-form compressive stress solutions are obtained based on our simple theoretical models, showing that long cracks significantly reduce the stress concentration of nearby holes. We quantify the reducing effect of the cracks' angle, surface friction, and pressure on the maximum shear and von Mises stresses around a hole, combining with finite element analysis results. The stress shielding effect is qualitatively consistent with the available experimental observations that the deep-buried caves are often located near the faults and large fractures in carbonate strata. Our results will be beneficial for future exploration of superdeep petroleum reservoirs.
关键词	Fault reservoir Deep-buried cave Hole-crack interaction Stress shielding
DOI	10.1007/s10409-024-24240-x
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:001339923000003
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
项目资助者	National Natural Science Foundation of China {11988102] ; Natural Science Foundation of Guangdong Province {2019A1515011909] ; Science Challenge Project {TZ2018002]
论文分区	二类/Q1
力学所作者排名	3+
RpAuthor	Zeng XG
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/97202
专题	非线性力学国家重点实验室
作者单位	1.【Zeng, Xiaguang】 Foshan Univ, Sch Mechatron Engn, Foshan 528000, Peoples R China 2.【Zhu, Guangyou】 PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 3.【Zhao, Bin】 PetroChina, Tarim Oilfield Co, Korla 841000, Peoples R China 4.【Wen, Jici】 Chinese Acad Sci, LNM, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Xiaguang,Zhu, Guangyou,Zhao, Bin,et al. On faults induced stress shielding to account for the formation of deep-buried reservoirs[J]. ACTA MECHANICA SINICA,2025,41,4,:424240.Rp_Au:Zeng XG
APA	Zeng, Xiaguang,Zhu, Guangyou,Zhao, Bin,&温济慈.(2025).On faults induced stress shielding to account for the formation of deep-buried reservoirs.ACTA MECHANICA SINICA,41(4),424240.
MLA	Zeng, Xiaguang,et al."On faults induced stress shielding to account for the formation of deep-buried reservoirs".ACTA MECHANICA SINICA 41.4(2025):424240.