Dynamic mechanical properties and constitutive model of oil-immersed and thermally-treated red sandstone

被引：1
作者：
Li, Ziyun [1 ,2 ]
Zhu, Yunhui [1 ]
Zhang, Guanglei [3 ]
Song, Yuqi [4 ]
Zhao, Baoyun [1 ]
机构：
[1] Chongqing Univ Sci & Technol, Chongqing Key Lab Energy Engn Mech & Disaster Prev, Chongqing 401331, Peoples R China
[2] Monash Univ, Dept Civil Engn, Melbourne, Vic 3800, Australia
[3] Hebei Univ Technol, Sch Civil & Transportat Engn, Tianjin, Peoples R China
[4] Monash Univ, Dept Civil Engn, Deep Earth Energy Res Lab, Bldg 60, Melbourne, Vic 3800, Australia
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2024年 / 438卷
关键词：
Rock dynamic; Deformation behaviors; Oil-immersed; Thermally-treated; Constitutive model; Heavy oil thermal recovery; HIGH-TEMPERATURE; FRACTURE-TOUGHNESS; ENERGY-DISSIPATION; WATER SATURATION; ROCK; BEHAVIOR; STRENGTH; FAILURE; RECOVERY; MOISTURE;
D O I：
10.1016/j.conbuildmat.2024.137015
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
To thoroughly investigate the stability of reservoir rock mass in heavy oil thermal recovery projects, this study explored the dynamic mechanical properties and deformation behaviors of thermally-treated red sandstone from the oil-immersed reservoir, taking the dry and water-saturated reservoirs as the comparison. The results show that the dynamic compression strength and energy transmission rate of oil-immersed and thermally-treated red sandstone are enhanced. With the help of scanning electron microscopy (SEM) tests, we observed the graincoating on the surface of the mineral particles of oil-immersed rock. The grain-coating enhances the rock matrix integrity and leads to the mechanical strengthening effect of oil-immersed rock. The fractal dimension of oilimmersed samples is smaller than that of dry and water-saturated samples. In addition, the theoretical values of the damage constitutive model are consistent with the experimental data, which verifies the validity of the damage model. Our new findings support that the oil weakens the deformation resistance ability of the microcrack part but strengthens that of the rock matrix.
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页数：15
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