An Evaluation Method of Brittleness Characteristics of Shale Based on the Unloading Experiment

doi:10.3390/en12091779

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	An Evaluation Method of Brittleness Characteristics of Shale Based on the Unloading Experiment
	Zhou, Xiaogui ; Liu, Haiming ; Guo, Yintong ; Wang, Lei ; Hou, Zhenkun ; Deng, Peng
刊名	ENERGIES
	2019
卷号	12 期号:9 页码:-
关键词	shale unloading rate brittleness evaluation failure characteristics mechanical parameters
ISSN号	1996-1073
DOI	10.3390/en12091779
英文摘要	Shale reservoir has an initial unloading effect during the natural uplift and erosion process, which causes the shale brittleness to change, affecting the design of the fracturing scheme. To consider this, the axial compression loading and confining pressure unloading experiment of shale is carried out, and then the influence of unloading rate on the mechanical parameters, failure characteristics, and the brittleness of rock are analyzed. What is more, a new evaluation method of brittleness characteristics that take the unloading effect into consideration is proposed. The conclusions are as follows: (1) The unloading rate has a weakening effect on the mechanical parameters, such as the destructive confining pressure and the residual strength of the samples. (2) The failure characteristics of shale specimens are a single shear failure in an oblique section under low unloading rate, and multiple shear zones accompanied with bedding fracture under high unloading rate. (3) The brittleness of shale samples is well verified by the brittleness index Bd1 and Bd2 during the loading path; nevertheless, it has shortage at the unloading path. This paper proposes a new brittleness evaluation method which can consider the influence of the different unloading rates and unloading points. Furthermore, there is a nice characterization between the brittleness damage and this method.
WOS研究方向	Energy & Fuels
语种	英语
WOS记录号	WOS:000469761700195
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/14984]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China; 2.Guangzhou Inst Bldg Sci Co Ltd, Guangzhou 510440, Guangdong, Peoples R China; 3.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 4.Kunming Univ Sci & Technol, Fac Civil Engn & Mech, Yunnan Key Lab Disaster Reduct Civil Engn, Kunming 650504, Yunnan, Peoples R China;
推荐引用方式 GB/T 7714	Zhou, Xiaogui,Liu, Haiming,Guo, Yintong,et al. An Evaluation Method of Brittleness Characteristics of Shale Based on the Unloading Experiment[J]. ENERGIES,2019,12(9):-.
APA	Zhou, Xiaogui,Liu, Haiming,Guo, Yintong,Wang, Lei,Hou, Zhenkun,&Deng, Peng.(2019).An Evaluation Method of Brittleness Characteristics of Shale Based on the Unloading Experiment.ENERGIES,12(9),-.
MLA	Zhou, Xiaogui,et al."An Evaluation Method of Brittleness Characteristics of Shale Based on the Unloading Experiment".ENERGIES 12.9(2019):-.