Application Of Electromagnetic Method In Exploration Of Geothermal Resources In Xingyi District

Under the guidance of the grand ecology and grand tourism development strategy of guizhou with the themes of "colorful guizhou fengshan mountain park province" and "China hot spring province",in 2016,guizhou carried out a general survey of the whole region tourism resources,and the survey found that guizhou has abundant underground hot water resources.But,because of the large buried deep underground hot water resources in guizhou area in the past to carry out the feasibility of underground hot water resources exploration geology can only from the surface to obtain evidence of the geological survey,shallow geophysical exploration,on the basis of the underground geological distribution,unable to accurately obtain the deep geological and tectonic space distribution information,which resulted in increased risk of underground water resources exploration and development,and the underground hot water resources drilling implementation cost is higher,how to make use of deep geophysical prospecting means to accurately identify the underground hot water resources related lithology(layer)and the distribution structure,accurately determine the well location is of great significance.This paper hope through the study on the lithologic(layer)and the geothermal resources "store,source and cover," paper summarizes texture unit or structure,such as recycled big depth logging data to calculate the longitudinal,transverse and comprehensive resistance rate,and then to establish the geological and geophysical section model,a comprehensive grasp on the basis of geological and geophysical characteristics,select effective means of electromagnetic method to identify lithology(layer)related to underground hot water resources distribution and construction,so as to achieve the goal of guiding geothermal resource exploration.Based on the background and the significance,the basic theory of detection method,the advantages and disadvantages of methods and techniques,and applicability,geological and geophysical characteristics,geological conditions and methods for storing heat technology application effect as the main research contents,emphasis on selection of domestic wide-area electromagnetic method comprehensive electromagnetic method,and the United States,Germany,GMS-7 e Ather part electromagnetic method and actual application effect is analyzed.This paper mainly studies the application of large-depth geophysical exploration method in the exploration of underground hot water resources,and improving the exploration accuracy is the core of this paper,that is,the three key problems to be solved in this paper are :(1)to solve the geophysical characteristics of geological environment of thermal storage geological unit of underground hot water resources in xingyi area;(2)to solve the problem of establishing the geology-geophysical model of xingyi area and thermal storage geological unit of underground hot water resources;(3)to solve the problem of corresponding characteristics and practical application of geological and geophysical anomalies;(4)compare the detection effects of wide-area electromagnetic method,Germany gms-07 e comprehensive electromagnetic system and America's electromagnetic totelluric method.From the perspective of detection effects,wide-area electromagnetic method is better than Germany gms-07 e comprehensive electromagnetic system,and America's electromagnetic totelluric method comes next.In terms of work efficiency,Germany's gms-07 e comprehensive electromagnetic system is better than wide-area electromagnetic method,followed by the United States' magnetotelluric method.In terms of working environment requirements,Germany's gms-07 e comprehensive electromagnetic system is better than the United States' electromagnetic totelluric method,followed by the wide-area electromagneticmethod.