| 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
| |
| Corresponding Author | Lin, Mian([email protected]) |
| Source Publication | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
 |
| 2022-10-01 | |
| Volume | 217Pages:19 |
| ISSN | 0920-4105 |
| Abstract | 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. |
| Keyword | Microdefects Brazilian splitting experiment Secondary microcrack (SMC) Growth mechanism Discrete element method (DEM) |
| DOI | 10.1016/j.petrol.2022.110898 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000847579600001 |
| WOS Keyword | TENSILE-STRENGTH ; FRACTURE ; FAILURE ; SANDSTONE ; BEHAVIOR ; DISCS |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Petroleum |
| Funding Project | 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] |
| Funding Organization | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Nat-ural Science Foundation of China |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Lin, Mian |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/90010 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation 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.Rp_Au:Lin, Mian |
| 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. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2022FA140_2022_Inv（25170KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment