Physical and mechanical behaviors of a thermal-damaged coarse marble under uniaxial compression

Peng, Jun; Guan, Rong; Cai, Ming; Yao, Mengdi; Zhou, Chuangbing

doi:10.1016/j.enggeo.2015.12.011

Cited by 132 publications

(41 citation statements)

References 18 publications

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“…The mass flow rate (also controlling velocity) is the main element impacting the quantity of friction loss based on Eqn (26), though the friction coefficient and velocity will change along with the variation of pressure and temperature. Therefore, it follows that the temperature at the bottom hole will be predicted by coupling Eqn (35) to include the friction loss and Eqn (51) to ignore the friction loss with Eqn (13) under a different injection rate to investigate the impact of the friction loss on temperature. As to the impact of the friction loss on pressure, this has been studied by Bai et al 7 Thus, this part will not be repeated in this work.…”

Section: Discussionmentioning

confidence: 99%

An explicit finite difference model for prediction of wellbore pressure and temperature distribution in CO₂ geological sequestration

Bai

et al. 2016

Greenhouse Gases

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To conveniently realize the coupling calculation between wellbore pressure and temperature and consider the friction loss in the process of wellbore flow and heat transfer, this work takes the one‐dimensional steady flow with homogeneous fluid in wellbores as the analysis object and divides the wellbore into finite micro‐segments. Then we derive the explicit finite difference model (EFDM) about pressure in a certain micro‐segment of wellbore, based on the mass and momentum equations. Next we deduce the EFDM about temperature reflecting the wellbore heat transfer in the same micro‐segment according to the energy balance equation. After that, a coupling calculation method for the EFDM about pressure and temperature is presented. Finally, a comparison of the simulation results of the EFDM, other models, and the log data from engineering is implemented, which demonstrates that the prediction results of the EFDM are more consistent with the log data than the results of other models. Therefore, the reliability of the EFDM about pressure and temperature and their coupling calculation method is verified. Discussion of the friction loss in the energy balance equation and the isobaric specific heat capacity showed that both have a great impact on wellbore temperature distribution, which means the friction loss should not be ignored and the isobaric specific heat capacity should not be assumed as a constant in applications. Generally, the prediction of wellbore pressure and temperature distribution and the comprehension of the internal essence of wellbore flow and heat transfer will be effectively promoted by this work. © 2016 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 99%

An explicit finite difference model for prediction of wellbore pressure and temperature distribution in CO₂ geological sequestration

Bai

et al. 2016

Greenhouse Gases

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“…Peng et al concluded that the thermal damage has a great effect on physical and mechanical properties of the rock sample. With increasing temperature, the non-linearity in the initial deformation stage is gradually enhanced [19]. González-Gómez et al tested four limestones and showed the effect of thermal degradation on the compression strength, ultimate compression strain, color and mass loss of rock sample [20].…”

Section: Introductionmentioning

confidence: 99%

Effects of high-temperature heating and cryogenic quenching on the physico-mechanical properties of limestone

2020

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This paper is designed to investigate the influence of high-temperature heating and cryogenic quenching using liquid nitrogen (LIN) cooling on the physico-mechanical properties of limestone such as compressive strength, tensile strength, ultrasonic pulse velocity (UPV) and morphological characterization. The main aim is to provide a better understanding on influence of the temperature shock including high temperature pre-treatments and combined process with heating followed by LIN quenching on the physico-mechanical properties of rock. The samples were subjected to different thermal treatment using high-temperature of 100 °C, 200 °C, 400 °C and 600 °C for 4 h. In addition, the combined process of heating at 600 °C for 4 h and LIN quenching for 15 min, 30 min, 45 min and 60 min has also been explored. The obtained results indicate that pre-treatments in limestone depict decreasing trend in strength values. Limestone samples show 62% drop in uniaxial compressive strength (UCS) and 84% drop in Brazilian tensile strength (BTS) for 600 °C pre-treatment for 4 h, whereas the decrease in 70% of UCS and 89% of BTS are also observed for the combined process with 60 min of LIN quenching. The influence of pre-treatment on UPV and microstructure of rock has been investigated in detail. Due to thermal stress, very low UPV has been obtained for the pre-treated samples compared to untreated. SEM analysis has been carried out to understand the fracture morphology for both untreated and treated rock samples.

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“…In addition to experimental investigations, many theoretical and numerical models have been proposed to investigate thermal damage of rock. For example, Sicsic and Bérest developed a fracture model to theoretically analyze the nucleation and propagation of salt, and Peng et al used a phenomenological model to simulate the complete stress‐strain curves of thermally treated coarse marble. Furthermore, Sirdesai et al studied the effect of different temperatures and durations of thermal treatment on the mechanical characteristics of rocks and developed an effective numerical model.…”

Section: Introductionmentioning

confidence: 99%

The evolution of sandstone microstructure and mechanical properties with thermal damage

Lei

Wang

Zhang

et al. 2019

Energy Science & Engineering

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The physical and mechanical properties of rocks at high temperatures change considerably with geothermal exploitation, underground coal gasification, and nuclear engineering construction, posing a threat to the safety of underground engineering. To investigate the effect of temperature on micro‐ and macroscale damage of sandstone, a series of uniaxial compressive strength (UCS) tests were conducted using an MTS 815 mechanical testing system. Acoustic emission (AE) monitoring, scanning electron microscopy (SEM), and nuclear magnetic resonance (NMR) were also employed. Macroscopically, it was found that the physical and mechanical properties of sandstone change with treatment temperature, but these changes do not follow a monotonic trend. In addition, the brittle‐ductile transition occurs at approximately 600°C, which is further confirmed by AE monitoring. Regarding the microstructural evolution of sandstone, the percentage of micropores shows a monotonically decreasing trend with increasing treatment temperature. The change in mesopores decreases slightly first, then shows a gradual increase, and finally decreases. The macropores first decrease and subsequently increase with increasing temperature. The decreasing trend of the meso‐ and macropores is attributed to thermal expansion at a relatively low temperature. However, the decrease in mesopores is due to their coalescence into macropores at higher temperatures. Furthermore, the integral value of the NMR spectrum first decreases and then increases with increasing treatment temperature, corresponding to the decrease in porosity from 25°C to 200°C, and then increases with temperature to 900°C. Finally, a constitutive model for the deformation and fracture of sandstone is established based on the effective medium theory and AE energy. The present study is helpful for improving the understanding of the process of thermal damage sandstone from both micro‐ and macroscale perspectives.

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Physical and mechanical behaviors of a thermal-damaged coarse marble under uniaxial compression

Cited by 132 publications

References 18 publications

An explicit finite difference model for prediction of wellbore pressure and temperature distribution in CO₂ geological sequestration

An explicit finite difference model for prediction of wellbore pressure and temperature distribution in CO₂ geological sequestration

Effects of high-temperature heating and cryogenic quenching on the physico-mechanical properties of limestone

The evolution of sandstone microstructure and mechanical properties with thermal damage

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Physical and mechanical behaviors of a thermal-damaged coarse marble under uniaxial compression

Cited by 132 publications

References 18 publications

An explicit finite difference model for prediction of wellbore pressure and temperature distribution in CO2 geological sequestration

An explicit finite difference model for prediction of wellbore pressure and temperature distribution in CO2 geological sequestration

Effects of high-temperature heating and cryogenic quenching on the physico-mechanical properties of limestone

The evolution of sandstone microstructure and mechanical properties with thermal damage

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An explicit finite difference model for prediction of wellbore pressure and temperature distribution in CO₂ geological sequestration

An explicit finite difference model for prediction of wellbore pressure and temperature distribution in CO₂ geological sequestration