Development of temperature sensing system in downhole application from temperature field in oil well

Design of a temperature sensing system for downhole application is facilitated by finite element analysis in this study, to research the temperature distribution of downhole in oil well. To deal with inaccuracy of mesh error in consideration of high aspect ratio of the oil well, we divided the well into multiple 500 meters - length pieces, each one of which was divided into 10 computing segments for feasibility of simulation with reduced complexity. Temperature distribution simulation of our proposed system prototype to work at 3k meters under the ground surface are analyzed as reported. We formatted an important power function equation for describing relationship between delta temperature (temperature gradient) and the segments; and the equation predicted ~38k temperature difference between the temperature at 3k depth and the exit of the oil well.