Laboratory hydraulic fracturing in layered tight sandstones using acoustic emission monitoring
文献类型：期刊论文
| 作者 | Li, Xiaying1,3; Lei, Xinglin2; Li, Qi1,3
|
| 刊名 | GEOENERGY SCIENCE AND ENGINEERING
 |
| 出版日期 | 2023-04-01 |
| 卷号 | 223期号:-页码:- |
| ISSN号 | 2949-8929 |
| 关键词 | Hydraulic fracturing Bedding anisotropy Water infiltration Tight sandstone Microcrack network Induced seismicity |
| 英文摘要 | Understanding the propagating mechanism of complex fracture network is essential for optimizing the hydraulic fracturing design scheme. Laboratory hydraulic fracturing experiments were performed on three tight sandstone specimens with bedding plane perpendicular, oblique and parallel to the axial direction, respectively. Before hydraulic fracturing, three specimens were first loaded close to the critical stress state under 22.5 MPa confining pressure. The entire hydraulic fracturing process was monitored by acoustic emission (AE) and ultrasonic measurement. The experimental results show that the hydraulic fracturing behaviors were significantly influenced by bedding structure and water infiltration. The bedding plane plays an important role on breakdown pressure, distribution characteristics of AE activities and hydraulic fracture networks. The bedding-oblique specimen exhibits lower breakdown pressure than those of the bedding-parallel and bedding-perpendicular specimens. AE activities in the bedding-oblique specimen is characterized by lower b-value, while higher bvalue is found in other two specimens. X-ray computed tomography images of the broken specimens show an excellent agreement between AE hypocenters and macroscopic fractures, indicating geometrical morphology of macroscopic fractures is closely related to the bedding plane and well imaged by AE hypocenters. A beddingparallel shear fault formed in the bedding-oblique specimen. Complex shear fault linking several beddingparallel echelon arrays or branches formed in the bedding-parallel and bedding-perpendicular specimens. Water infiltration affects the hydraulic fracturing behaviors by inducing AE events initiate at transition region of wet-dry boundary around the central borehole. In view of the formation of fracture network and the risk of induced seismicity, the influence of bedding structure and water infiltration should be taken into consideration under given in-situ stress regime during the hydraulic fracturing design scheme. |
| 学科主题 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000958730600001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35162]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing, 100049, China 2.National Institute of Advanced Industrial Science and Technology (AIST). Tsukuba, 305-8567, Ibaraki, Japan 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics (IRSM), Chinese Academy of Sciences, Wuhan, 430071, China |
| 推荐引用方式 GB/T 7714 | Li, Xiaying,Lei, Xinglin,Li, Qi. Laboratory hydraulic fracturing in layered tight sandstones using acoustic emission monitoring[J]. GEOENERGY SCIENCE AND ENGINEERING,2023,223(-):-. |
| APA | Li, Xiaying,Lei, Xinglin,&Li, Qi.(2023).Laboratory hydraulic fracturing in layered tight sandstones using acoustic emission monitoring.GEOENERGY SCIENCE AND ENGINEERING,223(-),-. |
| MLA | Li, Xiaying,et al."Laboratory hydraulic fracturing in layered tight sandstones using acoustic emission monitoring".GEOENERGY SCIENCE AND ENGINEERING 223.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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