The heat preservation and its cost have become the bottleneck of the geothermal resource development. With this in view, a wellbore temperature calculation model is established based on the characteristics of the well bore configuration of the geothermal well. The model is validated through the test data of the geothermal well A,and it is used for sensitivity analysis of the heat loss factors of the geothermal wells. The results show that a geothermal well is changed from a part segment production to the full segment production through well washing and other effective measures, by which the well head temperature is increased from 61.2℃ to 65.7℃. The wellhead liquid temperature can be increased by increasing the fluid production rate, however, the increasing trend slows down as the rate increases. Also the wellhead liquid temperature is significantly affected by the well bore configuration that needs a systematic optimization. At last a 400 meter heat preservation tubing can increase the wellhead liquid temperature by 2.7℃. Based on the analysis results, the corresponding heat preservation suggestions are proposed, for the development of geothermal wells.

geothermal well  /  well bore configuration  /  heat loss  /  sensitivity analysis