Application of regional gravitation in the geothermal exploration and analysis of geothermal reserves in Lanzhou fault basin

The author revealed the structural form of basement and the location of the fault zone of the Tertiary fault basin in Lanzhou by means of regional gravitation exploration; Predicted the abnormal geothermal distribution area using hydrogeochemical geothermal thermometric scale of SiO_2 and predirect temperature test in wells. The author points out the position of geothermal reservoir through the analysis of the logging material from a deep borehole located in the yard of the factory of petroleum and chemical engineering in Lanzhou. The foreground of geothermal resources and the advantageous region for exploration were provided.