Abstract:In order to eliminate the influence of wellbore thermal effect, the water level need to be corrected in the geothermal research, otherwise a wrong conclusion will be got probably. On the basis of analyzing the mechanism of wellbore themal effect briefly, two exsisting calculations on water level correction have been introduced, and a new calculation based on integral principle has been put forward as well. Through factual examples, the results of all the three calculations have been compared and analyzed.