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Geofluids
Volume 2017, Article ID 7510527, 12 pages
https://doi.org/10.1155/2017/7510527
Research Article

A Pore-Scale Simulation on Thermal-Hydromechanical Coupling Mechanism of Rock

1School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China
2School of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, China
3State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
4Deep Earth Energy Research Laboratory, Department of Civil Engineering, Monash University, Melbourne, VIC 3800, Australia
5Shenyang Research Institute, China Coal Technology & Engineering Group Corp., Shenyang 110016, China

Correspondence should be addressed to Rui Song; moc.621@6050iurgnos and Jianjun Liu; moc.anis@6090jjuil

Received 24 February 2017; Accepted 28 March 2017; Published 18 April 2017

Academic Editor: Yi Wang

Copyright © 2017 Rui Song et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Thermal-hydromechanical (THM) coupling process is a key issue in geotechnical engineering emphasized by many scholars. Most existing studies are conducted at macroscale or mesoscale. This paper presents a pore-scale THM coupling study of the immiscible two-phase flow in the perfect-plastic rock. Assembled rock matrix and pore space models are reconstructed using micro-CT image. The rock deformation and fluid flow are simulated using ANSYS and CFX software, respectively, in which process the coupled physical parameters will be exchanged by ANSYS multiphysics platform at the end of each iteration. Effects of stress and temperature on the rock porosity, permeability, microstructure, and the displacing mechanism of water flooding process are analyzed and revealed.