The effect of phase transition on the compressional wave velocity for a trachybasalt at high temperature and high pressure

1999 ◽  
Vol 44 (15) ◽  
pp. 1415-1418 ◽  
Author(s):  
Wenge Zhou ◽  
Hongsen Xie ◽  
Zhidan Zhao ◽  
Weiguo Zhu ◽  
Jie Guo ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
High Temperature ◽  
Wave Velocity ◽  
Compressional Wave ◽  
Compressional Wave Velocity

scholarly journals Thermophysical and Mechanical Properties of Granite and Its Effects on Borehole Stability in High Temperature and Three-Dimensional Stress

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Wang Yu ◽  
Liu Bao-lin ◽  
Zhu Hai-yan ◽  
Yan Chuan-liang ◽  
Li Zhi-jun ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Wave Velocity ◽  
Poisson Ratio ◽  
Three Dimensional ◽  
Good Method ◽  
Compressional Wave ◽  
Compressional Wave Velocity ◽  
Borehole Stability ◽  
Collapse Pressure

When exploiting the deep resources, the surrounding rock readily undergoes the hole shrinkage, borehole collapse, and loss of circulation under high temperature and high pressure. A series of experiments were conducted to discuss the compressional wave velocity, triaxial strength, and permeability of granite cored from 3500 meters borehole under high temperature and three-dimensional stress. In light of the coupling of temperature, fluid, and stress, we get the thermo-fluid-solid model and governing equation. ANSYS-APDL was also used to stimulate the temperature influence on elastic modulus, Poisson ratio, uniaxial compressive strength, and permeability. In light of the results, we establish a temperature-fluid-stress model to illustrate the granite’s stability. The compressional wave velocity and elastic modulus, decrease as the temperature rises, while poisson ratio and permeability of granite increase. The threshold pressure and temperature are 15 MPa and 200°C, respectively. The temperature affects the fracture pressure more than the collapse pressure, but both parameters rise with the increase of temperature. The coupling of thermo-fluid-solid, greatly impacting the borehole stability, proves to be a good method to analyze similar problems of other formations.

Equation of state and phase transition of antigorite under high pressure and high temperature

2014 ◽  
Vol 228 ◽  
pp. 56-62 ◽  
Author(s):  
Cuiping Yang ◽  
Toru Inoue ◽  
Akihiro Yamada ◽  
Takumi Kikegawa ◽  
Jun-ichi Ando
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
High Temperature ◽  
Equation Of State

scholarly journals Monitoring phase transition of aqueous biomass model substrates by high-pressure and high-temperature microfluidics

2019 ◽  
Vol 40 (4) ◽  
pp. 563-570 ◽  
Author(s):  
Renée M. Ripken ◽  
Stefan Schlautmann ◽  
Remco G.P. Sanders ◽  
Johannes G.E. Gardeniers ◽  
Séverine Le Gac
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
High Temperature ◽  
Monitoring Phase
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