Application Of Geophysical Methods In Geothermal Exploration

Geothermal energy as a clean energy,heat collection,minerals,water in one,can be applied to power generation,heating,farming,medicine,tourism,to a certain extent,reduce the use of coal,natural gas,petroleum,improve air quality.China has a vast territory and complex geological structure.Convective geothermal fields with fractured fractures as heat storage structures are widely distributed in China.Such geothermal energy often has medical and commercial values and can significantly stimulate local tourism.The application of geophysical methods for such geothermal fields is still in the deficient stage.The common use of geophysical methods in geothermal exploration is the blind use of geophysical methods in the application of such geothermal applications and the evaluation of the effectiveness of the methods.The appropriate method combinations can be proposed for follow-up.This type of geothermal field exploration method selection provides important reference and reference significance.Firstly,the heat source,geothermal type,geothermal genesis of geothermal field,and geothermal field,an important parameter in geothermal exploration,are described.The discussion focused on the geothermal genesis and types in the study area and demonstrated that the geothermal anomaly in the medium-low temperature convective geothermal exploration has important implications for the geothermal heat storage structure.Secondly,based on the characteristics of low-temperature convective geothermal,the magnetic method,electro-magnetic sounding,CSAMT and AMT were selected as geophysical methods for geothermal exploration.Analysing the composition of the geomagnetic field,obtaining the normal field,and extracting and separating geomagnetic anomalies from the geomagnetic field,and then proceeding from the effects of temperature and groundwater on the magnetic properties of the rock,it is theoretically demonstrated that magnetic measurement is feasible in the study area.Sex.The formulae of the apparent resistivity of the magnetotelluric method and the electric dipole field are deduced,and the conditions for the equivalent electromagnetic field of the two are theoretically explained.The actual resistivity of CSAMT and AMT are verified by actual measurement.Similarities in resistivity.According to the characteristics of the convective geothermal field,the corresponding resistivity model was designed,and the forward simulation of the model was performed.The apparent resistivity of the TM model was analyzed for the anomaly,and the forward processing and interpretation of CSAMT and AMT were provided.basis.Finally,by applying the method of previous selection to Jiuhuashan geothermal,the application ideas of each method in exploration and the application effect of the method in exploration were demonstrated,and the effectiveness of the selected method was confirmed,and the geothermal convection geothermal Combined geophysical methods for exploration.