Velocities of Convective Ascending Flow in Geothermal Systems Based on Static Temperature Logging Data Analysis and Simulation Study

Abstract

Macroscopic velocities of convective ascending flow in hydrothermal convection systems show typical characteristics. Our objective is to clarify its characteristics of the systems. In this study, we conducted static temperature logging data analyses and numerical simulation studies. From simple onedimensional analyses based on static temperature logging data, it was found that the velocities of convective ascending flow in active convection systems had the same order of values. Simulation studies for liquid-dominated hydrothermal systems were also conducted in order to clarify the effects of heat source temperature or permeability structure on the velocities of ascending flow. As a result, in spite of large difference of heat source temperature or permeability structure in a practical range, ascending flow velocity changes only in less than one order of magnitude.