The Golmud-Ejin heat flow profile consists of 18 observed heat flow values. They arelimited in data number, distributed unevenly and vary from 55 mW·m<sup>-2</sup> to 79 mW·m<sup>-2</sup...The Golmud-Ejin heat flow profile consists of 18 observed heat flow values. They arelimited in data number, distributed unevenly and vary from 55 mW·m<sup>-2</sup> to 79 mW·m<sup>-2</sup>展开更多
The transect from Manzhouli to Suifenhe is one of 11 geoscience transects in China,which are defined by Chinese Commission on the Lithosphere to practise the Global Geosciences Transects Project (GGT). It will help us...The transect from Manzhouli to Suifenhe is one of 11 geoscience transects in China,which are defined by Chinese Commission on the Lithosphere to practise the Global Geosciences Transects Project (GGT). It will help us establish lithosphere dynamics model of continental margin around the west Pacific ocean by investigating the structure展开更多
Among the numerous GGT projects in China, the GGT from Yadong to Golmud crossing the whole Tibetan Plateau stands out for its peculiar tectonic environment of continentcontinent collision orogeny and characteristic ge...Among the numerous GGT projects in China, the GGT from Yadong to Golmud crossing the whole Tibetan Plateau stands out for its peculiar tectonic environment of continentcontinent collision orogeny and characteristic geophysical fields of a co-existing thick yet warm crust. The terrestrial heat flow measurements have resulted in setting up a heat flow profile at the highest elevations on a global scale running through the 'Roof of the World'. It extends from south to north for about 1300 km, consisting of 22 heat flow values from 13 individual studied regions: Puma Lake (91 mW/m^2, average value, the same below),展开更多
The present study aims at investigating the effect of temperature variation due to heat transfer between the formation and drilling fluids considering influx from the reservoir in the underbalanced drilling condition....The present study aims at investigating the effect of temperature variation due to heat transfer between the formation and drilling fluids considering influx from the reservoir in the underbalanced drilling condition. Gas-liquid-solid three-phase flow model considering transient thermal interaction with the formation was applied to simulate wellbore fluid to calculate the wellbore temperature and pressure and analyze the influence of different parameters on fluid pressure and temperature distribution in annulus. The results show that the non-isothermal three-phase flow model with thermal consideration gives more accurate prediction of bottom-hole pressure(BHP) compared to other models considering geothermal temperature. Viscous dissipation, the heat produced by friction between the rotating drilling-string and well wall and drill bit drilling, and influx of oil and gas from reservoir have significant impact on the distribution of fluid temperature in the wellbore, which in turn affects the BHP. Bottom-hole fluid temperature decreases with increasing liquid flow rate, circulation time, and specific heat of liquid and gas but it increases with increasing in gas flow rate. It was found that BHP is strongly depended on the gas and liquid flow rates but it has weak dependence on the circulation time and specific heat of liquid and gas. BHP increase with increasing liquid flow rate and decreases with increasing gas flow rate.展开更多
The present pagination reports both Brownian diffusion and thermophoresis aspects subject to magneto hydrodynamic Williamson fluid model.Assuming the flow is unsteady and blood is treated as Williamson fluid over a we...The present pagination reports both Brownian diffusion and thermophoresis aspects subject to magneto hydrodynamic Williamson fluid model.Assuming the flow is unsteady and blood is treated as Williamson fluid over a wedge with radiation.The governing equations are transformed into ordinary differential equations by using similarity variables.The analytical solutions of the transformed governing equations are obtained by using the RK 4th order method along with shooting technique solver.The effects of various physical parameters such as Hartmann number,local Weissenberg number,radiation parameter,unsteadiness parameter,Prandtl number,Lewis number,Brownian diffusion,thermophoresis,wedge angle parameter,moving wedge parameter,on velocity,temperature,concentration,skin friction,heat transfer rate and mass transfer rate have been discussed in detail.The velocity and temperature profile deprives for larger We and an opposite trend is observed for concentration.The radiation parameter is propositional to temperature and a counter behaviour is observed for Pr.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘The Golmud-Ejin heat flow profile consists of 18 observed heat flow values. They arelimited in data number, distributed unevenly and vary from 55 mW·m<sup>-2</sup> to 79 mW·m<sup>-2</sup>
基金Project financially supported by the Ministry of Geology and Mineral Resources, China.
文摘The transect from Manzhouli to Suifenhe is one of 11 geoscience transects in China,which are defined by Chinese Commission on the Lithosphere to practise the Global Geosciences Transects Project (GGT). It will help us establish lithosphere dynamics model of continental margin around the west Pacific ocean by investigating the structure
基金Project supported by the National Natural Science Foundation of China
文摘Among the numerous GGT projects in China, the GGT from Yadong to Golmud crossing the whole Tibetan Plateau stands out for its peculiar tectonic environment of continentcontinent collision orogeny and characteristic geophysical fields of a co-existing thick yet warm crust. The terrestrial heat flow measurements have resulted in setting up a heat flow profile at the highest elevations on a global scale running through the 'Roof of the World'. It extends from south to north for about 1300 km, consisting of 22 heat flow values from 13 individual studied regions: Puma Lake (91 mW/m^2, average value, the same below),
文摘The present study aims at investigating the effect of temperature variation due to heat transfer between the formation and drilling fluids considering influx from the reservoir in the underbalanced drilling condition. Gas-liquid-solid three-phase flow model considering transient thermal interaction with the formation was applied to simulate wellbore fluid to calculate the wellbore temperature and pressure and analyze the influence of different parameters on fluid pressure and temperature distribution in annulus. The results show that the non-isothermal three-phase flow model with thermal consideration gives more accurate prediction of bottom-hole pressure(BHP) compared to other models considering geothermal temperature. Viscous dissipation, the heat produced by friction between the rotating drilling-string and well wall and drill bit drilling, and influx of oil and gas from reservoir have significant impact on the distribution of fluid temperature in the wellbore, which in turn affects the BHP. Bottom-hole fluid temperature decreases with increasing liquid flow rate, circulation time, and specific heat of liquid and gas but it increases with increasing in gas flow rate. It was found that BHP is strongly depended on the gas and liquid flow rates but it has weak dependence on the circulation time and specific heat of liquid and gas. BHP increase with increasing liquid flow rate and decreases with increasing gas flow rate.
文摘The present pagination reports both Brownian diffusion and thermophoresis aspects subject to magneto hydrodynamic Williamson fluid model.Assuming the flow is unsteady and blood is treated as Williamson fluid over a wedge with radiation.The governing equations are transformed into ordinary differential equations by using similarity variables.The analytical solutions of the transformed governing equations are obtained by using the RK 4th order method along with shooting technique solver.The effects of various physical parameters such as Hartmann number,local Weissenberg number,radiation parameter,unsteadiness parameter,Prandtl number,Lewis number,Brownian diffusion,thermophoresis,wedge angle parameter,moving wedge parameter,on velocity,temperature,concentration,skin friction,heat transfer rate and mass transfer rate have been discussed in detail.The velocity and temperature profile deprives for larger We and an opposite trend is observed for concentration.The radiation parameter is propositional to temperature and a counter behaviour is observed for Pr.
