Experimental Investigation on the Initiation of Hydraulic Fractures from a Simulated Wellbore in Laminated Shale

doi:10.2113/2021/4152918

	Experimental Investigation on the Initiation of Hydraulic Fractures from a Simulated Wellbore in Laminated Shale
	Liu, Yang 3,4; Chen, Congrui 4; Ma, Tianshou 2,3; Zhu, Gongsheng 3; Peng, Nian 3; Zhang, Xi 1
刊名	LITHOSPHERE
	2021-07-01
卷号	2021 页码:14
ISSN号	1941-8264
DOI	10.2113/2021/4152918
英文摘要	Understanding the formation mechanisms of complex fracture networks is vitally important for hydraulic fracturing operations in shale formation. For this purpose, a hydraulic fracturing experiment under a core-plunger scale is conducted to investigate the impact of the bedding plane angle, borehole size, and injection rate on fracture initiation behaviors of laminated shale rock. The results on rock properties demonstrate that the anisotropic characteristics of shale rock are reflected not only in elastic modulus but also in tensile strength. The results of fracturing experiments show that the bedding plane dip angle and borehole size have significant effects on fracture initiation behaviors, in that fracture initiation pressure (FIP) decreases with the increase of those two factors. The impact of injection rate, by contrast, has no obvious variety regulation. The above data is further used to validate our previously proposed fully anisotropic FIP model, which shows better agreement with experimental results than those using other models under various parameter combinations. Finally, a postfracturing analysis is performed to identify the fracture growth patterns and the microstructures on the fracture surfaces. The results show that the hydraulic fractures (HFs) always grow along mechanically favorable directions, and the potential interaction between HFs and bedding planes mainly manifests as fracture arrest. Meanwhile, the roughness of fracture surfaces is physically different from each other, which in turn results in the difficulties of fluid flow and proppant migration. The findings of this study can help for a better understanding of the fracture initiation behavior of laminated shale rock and the corresponding fracture morphology.
资助项目	Sichuan Science and Technology Program[2021YFH0047] ; Sichuan Science and Technology Program[2020JDJQ0055] ; Fok Ying Tong Education Foundation, China[171097] ; Youth Scientific and Technological Innovation Team Foundation of Southwest Petroleum University[2019CXTD09] ; Program of Introducing Talents of Discipline to Chinese Universities (111 Plan)[D18016]
WOS研究方向	Geochemistry & Geophysics ; Geology
语种	英语
出版者	GEOSCIENCEWORLD
WOS记录号	WOS:000718211200018
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28248]
专题	中科院武汉岩土力学所
通讯作者	Ma, Tianshou
作者单位	1.SCT Operat Pty Ltd, Wollongong, NSW 2500, Australia 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploit, Chengdu 610500, Sichuan, Peoples R China 4.Southwest Petr Univ, Sch Mechatron Engn, Chengdu 610500, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yang,Chen, Congrui,Ma, Tianshou,et al. Experimental Investigation on the Initiation of Hydraulic Fractures from a Simulated Wellbore in Laminated Shale[J]. LITHOSPHERE,2021,2021:14.
APA	Liu, Yang,Chen, Congrui,Ma, Tianshou,Zhu, Gongsheng,Peng, Nian,&Zhang, Xi.(2021).Experimental Investigation on the Initiation of Hydraulic Fractures from a Simulated Wellbore in Laminated Shale.LITHOSPHERE,2021,14.
MLA	Liu, Yang,et al."Experimental Investigation on the Initiation of Hydraulic Fractures from a Simulated Wellbore in Laminated Shale".LITHOSPHERE 2021(2021):14.