| The shortage of traditional fossil energy and the environmental problems that have arisen during its use have intensified.Finding and developing clean energy is imminent.Taking geothermal resources as a representative of new energy gradually entering human eyes,its own cleanliness,reproducibility,and versatility make it the mainstream of new energy sources,energy shortage and environmental issues provide new resources to alleviate the vision.The Yishu fault is an important active structure around Changchun and intersects with the Yitong River fault.It is not only the important traffic and hydroelectric belt in Jilin Province,but also is an important geological and mineral belt,producing lignite,soft Refractory clay and ceramic clay;it is oil and gas resources,geothermal resources of the enrichment area,which proved its developmental characteristics of great significance.This paper collates and collects predecessors' research data,summarizes the internal strata and structural features of the study area,and discusses geothermal geological conditions,thermal and thermal structures,and regional thermal storage types in the area.Using geophysical methods to conduct geothermal resource exploration,and analyzing surface temperature changes through remote sensing image data,through the gravity and magnetic survey,the regional tectonic framework was identified,the regional geological structure background was identified,and geological units were identified.The exploration is based on the MT method,and the electrical profiles obtained by inverting the survey lines are integrated with the regional geological data,and the stratigraphic structure of the study area is divided,the characteristics of the electrical structure of the regional stratum are discussed,and a comprehensive geological interpretation of the study area is carried out.Based on the depth and morphological characteristics of the magnetic anomaly data inferred from the inversion of the anomaly data,the characteristics of the temperature field inside the field were estimated,the temperature change of the rock resistivity was discussed,and the prospect of geothermal investigation was speculated.Finally,after a detailed investigation of the CSAMT method for geothermal prospects in southern Leshan,drilling was carried out and finally a geothermal resource well with a considerable temperature of 60°C was obtained.The application of the integrated geophysical method in this area more accurately surveys the geographical location of the thermal and thermal structures in the exploration area,it has effectively proved the distribution scope of geothermal fields,greatly improved the success rate of geothermal wells,and provided a referable survey technology route for similar geothermal resources exploration in the future,which has important guiding significance. |
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