Predicting macroscopic elastic rock properties requires detailed information on microstructure

被引：9

作者：

Wetzel, Maria ^{[1
]}

Kempka, Thomas ^{[1
]}

Kuehn, Michael ^{[1
,2
]}

机构：

[1] GFZ German Res Ctr Geosci, Fluid Syst Modelling, Telegrafenberg, D-14473 Potsdam, Germany

[2] Univ Potsdam, Inst Earth & Environm Sci, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany

来源：

EUROPEAN GEOSCIENCES UNION GENERAL ASSEMBLY 2017, EGU DIVISION ENERGY, RESOURCES & ENVIRONMENT (ERE) | 2017年 / 125卷

关键词：

digital rock physics; effective elastic properties; numerical homogenization; Young's modulus; micromechanics; geomaterials; REACTIVE TRANSPORT SIMULATIONS; MECHANICAL-BEHAVIOR; COMPOSITE-MATERIALS; HOMOGENIZATION; STORAGE; INCLUSIONS; BENTONITE; SYSTEMS; PHYSICS; STRESS;

D O I：

10.1016/j.egypro.2017.08.195

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Predicting variations in macroscopic mechanical rock behaviour due to microstructural changes, driven by mineral precipitation and dissolution is necessary to couple chemo-mechanical processes in geological subsurface simulations. We apply 3D numerical homogenization models to estimate Young's moduli for five synthetic microstructures, and successfully validate our results for comparable geometries with the analytical Mori-Tanaka approach. Further, we demonstrate that considering specific rock microstructures is of paramount importance, since calculated elastic properties may deviate by up to 230 % for the same mineral composition. Moreover, agreement between simulated and experimentally determined Young's moduli is significantly improved, when detailed spatial information are employed. (C) 2017 The Authors. Published by Elsevier Ltd.

引用

页码：561 / 570

页数：10

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