Pore pressure pulse migration in microcracked andesite recorded with fibre optic sensors
文献类型：期刊论文
| 作者 | Nicolas, A.1,2; Bloecher, G.3; Kluge, C.3; Li, Z.2; Hofmann, H.3; Pei, L.3,4; Milsch, H.3; Fortin, J.2; Gueguen, Y.2 |
| 刊名 | GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 24页码:14 |
| ISSN号 | 2352-3808 |
| DOI | 10.1016/j.gete.2020.100183 |
| 英文摘要 | Pore pressure has a major influence on the effective stress and thus on the mechanical behaviour of rocks. In this study, we focus on the hydro-mechanical behaviour of a low porosity andesitic rock heat-treated to 930 degrees C to induce thermal cracks and increase the permeability of the samples. First, we show that permeability decreases from 8 x 10(-16) m(2) to 1.5 x 10(-17) m(2) with a confining pressure (P-c) increase from 2 MPa to 40 MPa (pore pressure being approximately 0.2 MPa). Then, we used fibre optic pressure sensors to monitor pore pressure diffusion at three points along the sample during the propagation of a pore pressure pulse under hydrostatic (P-c=40 MPa) and triaxial stresses (P-c=40 MPa, differential stress of 356 MPa). When the pore pressure pulse was applied, the fibre optic sensors showed a sudden pore pressure increase one after the other as a function of their location along the sample. Pore pressure increase downstream was very smooth under hydrostatic stress and almost zero after the duration of the experiment (50 min) under triaxial stresses. This lack of downstream pore pressure increase under triaxial stresses is due to the fact that a differential stress of 356 MPa decreased permeability from approximately 10(-17) m(2) to approximately 10(-19) m(2). Finally, the pore pressure diffusion process was modelled considering a uniform spatial distribution of permeability in the andesite sample and the dead volume attached at the downstream side. (C) 2020 Published by Elsevier Ltd. |
| 资助项目 | Programme Hubert Curien (PHC) Procope grant by the Deutscher Akademischer Austausch Dienst (DAAD) in Germany[32989NB] ; Ministere de l'Enseignement superieur, de la Recherche et de l'Innovation (MESRI) in France ; ADEME, French environmental agency ; Investissement d'Avenir, a French government |
| WOS研究方向 | Energy & Fuels ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000544140600004 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/24462]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Nicolas, A. |
| 作者单位 | 1.Eurofins Anal Batiment, Equipe Rech & Dev, Saverne, France 2.PSL Res Univ, Lab Geol, Ecole Normale Super, CNRS,UMR 8538, Paris, France 3.Helmholtz Ctr Potsdam, GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany 4.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Nicolas, A.,Bloecher, G.,Kluge, C.,et al. Pore pressure pulse migration in microcracked andesite recorded with fibre optic sensors[J]. GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT,2020,24:14. |
| APA | Nicolas, A..,Bloecher, G..,Kluge, C..,Li, Z..,Hofmann, H..,...&Gueguen, Y..(2020).Pore pressure pulse migration in microcracked andesite recorded with fibre optic sensors.GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT,24,14. |
| MLA | Nicolas, A.,et al."Pore pressure pulse migration in microcracked andesite recorded with fibre optic sensors".GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT 24(2020):14. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。