Modeling of Fracture Width and Conductivity in Channel Fracturing With Nonlinear Proppant-Pillar Deformation

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	Modeling of Fracture Width and Conductivity in Channel Fracturing With Nonlinear Proppant-Pillar Deformation
	Zhu HY; Zhao YP(赵亚溥); Feng YC; Wang HW; Zhang LY; McLennan JD
刊名	SPE JOURNAL
	2019-06-01
卷号	24 期号:3 页码:1288-1308
ISSN号	1086-055X
通讯作者	Zhu, Haiyan()
英文摘要	Channel fracturing acknowledges that there will be local concentrations of proppant that generate high-conductivity channel networks within a hydraulic fracture. These concentrations of proppant form pillars that maintain aperture. The mechanical properties of these proppant pillars and the reservoir rock are important factors affecting conductivity. In this paper, the nonlinear stress/strain relationship of proppant pillars is first determined using experimental results. A predictive model for fracture width and conductivity is developed when unpropped, highly conductive channels are generated during the stimulation. This model considers the combined effects of pillar and fracture-surface deformation, as well as proppant embedment. The influence of the geomechanical parameters related to the formation and the operational parameters of the stimulation are analyzed using the proposed model. The results of this work indicate the following: 1. Proppant pillars clearly exhibit compaction in response to applied closure stress, and the resulting axial and radial deformation should not be ignored in the prediction of fracture conductivity. 2. There is an optimal ratio (approximately 0.6 to 0.7) of pillar diameter to pillar distance that results in a maximum hydraulic conductivity regardless of pillar diameter. 3. The critical ratio of rock modulus to closure stress currently used in the industry to evaluate the applicability of a channel-fracturing technique is quite conservative. 4. The operational parameters of fracturing jobs should also be considered in the evaluation.
分类号	一类
资助项目	National Natural Science Foundation of China[51604232] ; National Natural Science Foundation of China[51874253] ; National Natural Science Foundation of China[11872363] ; National Natural Science Foundation of China[51861145314] ; China Postdoctoral Science Foundation[2017M610117] ; China Postdoctoral Science Foundation[2018T110142] ; Search Foundation of Sichuan Province[2018FZ0069] ; Chinese Academy of Sciences (CAS) through the CAS Interdisciplinary Innovation Team Project ; CAS Key Research Program of Frontier Sciences[QYZDJ-SSW449JSC019] ; CAS Strategic Priority Research Program[XDB22040401]
WOS关键词	HYDRAULIC FRACTURES ; MECHANICAL STABILITY ; EMBEDMENT ; SIMULATION ; STRESS
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000471258300023
资助机构	National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Search Foundation of Sichuan Province ; Chinese Academy of Sciences (CAS) through the CAS Interdisciplinary Innovation Team Project ; CAS Key Research Program of Frontier Sciences ; CAS Strategic Priority Research Program
其他责任者	Zhu, Haiyan
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/79382]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Zhu HY,Zhao YP,Feng YC,et al. Modeling of Fracture Width and Conductivity in Channel Fracturing With Nonlinear Proppant-Pillar Deformation[J]. SPE JOURNAL,2019,24(3):1288-1308.
APA	Zhu HY,赵亚溥,Feng YC,Wang HW,Zhang LY,&McLennan JD.(2019).Modeling of Fracture Width and Conductivity in Channel Fracturing With Nonlinear Proppant-Pillar Deformation.SPE JOURNAL,24(3),1288-1308.
MLA	Zhu HY,et al."Modeling of Fracture Width and Conductivity in Channel Fracturing With Nonlinear Proppant-Pillar Deformation".SPE JOURNAL 24.3(2019):1288-1308.