HU Wenxuan,JIN Zhijun,SONG Yucai,SUN Rui and DUAN Zhenhao State Key Laboratory of Mineral Deposits Research,Department of Earth Sciences,Nanjing University,Nanjing,Jiangsu 21009,Basin and Reservoir Research Center,Petroleum University,Changping,Beijing 102200 Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029
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HU Wenxuan,JIN Zhijun,SONG Yucai,SUN Rui and DUAN Zhenhao State Key Laboratory of Mineral Deposits Research,Department of Earth Sciences,Nanjing University,Nanjing,Jiangsu 21009,Basin and Reservoir Research Center,Petroleum University,Changping,Beijing 102200 Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029
Based on a set of equations established by Duan et al. (1992, 1996) for a geofluid system H2O-CO2-CH4(-N2), a formula is obtained to calculate the heat changes. Combining the geological T-P conditions (geothermal gradients and lithostatic and hydrostatic pressures), the enthalpy of some typical geofluids is figured out. Then the principles of heat transfer of deep-derived supercritical fluids are discussed. The result shows that deep-derived geofluids can bring a large amount of thermal heat and release most heat to the shallow surroundings as they move up, because the molar enthalpies vary very greatly from the deep to shallow, increasing with the increases of T and P. Generally, more than tens of kilojoules heat per molar can be released. Furthermore, the molar enthalpy is affected by the compositions of the geofluids, and the molar enthalpy of CO2, CH4, or N2 is greater than that of H2O, being twice, more than twice, and about 140% of H2O, respectively. Finally, a case study is conducted by investigat
Based on a set of equations established by Duan et al. (1992, 1996) for a geofluid system H2O-CO2-CH4(-N2), a formula is obtained to calculate the heat changes. Combining the geological T-P conditions (geothermal gradients and lithostatic and hydrostatic pressures), the enthalpy of some typical geofluids is figured out. Then the principles of heat transfer of deep-derived supercritical fluids are discussed. The result shows that deep-derived geofluids can bring a large amount of thermal heat and release most heat to the shallow surroundings as they move up, because the molar enthalpies vary very greatly from the deep to shallow, increasing with the increases of T and P. Generally, more than tens of kilojoules heat per molar can be released. Furthermore, the molar enthalpy is affected by the compositions of the geofluids, and the molar enthalpy of CO2, CH4, or N2 is greater than that of H2O, being twice, more than twice, and about 140% of H2O, respectively. Finally, a case study is conducted by investigat
HU Wenxuan, JIN Zhijun, SONG Yucai, SUN Rui and DUAN Zhenhao State Key Laboratory of Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu, Basin and Reservoir Research Center, Petroleum University, Changping, Beijing Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing .2004. Theoretical Calculation Model of Heat Transfer for Deep-derived Supercritical Fluids with a Case Study[J]. ACTA GEOLOGICA SINICA(English edition),78(1):
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