The Study Of Electrical Prospecting In The Deep Geothermal Investigation

Geothermal resources are integrated resources mixed the heat,mineral and water. With the accelerated pace of urbanization, the increasing levels of resources to ensure that serious, important resources recoverable reserves decline, the problem of irrational energy structure, China has begun restricting the pace of economic development, Geothermal energy much as a new people of all ages. Has been the development of geothermal fields have more than 4,000, and that an annual growth rate of 10%, the total energy use of geothermal resources has been ranked in the world. Although the geothermal resource development is very rapid, but its exploration methods and means of interpretation and did not get a substantial raise, the traditional geophysical exploration methods and interpretation of technology is also applied to different geothermal field exploration, and therefore how to improve geothermal field exploration results are The current need to address important issues.Electrical prospecting in a different rocks and ores difference between the electrical basis of electromagnetic field through the observation and study of natural and artificial electromagnetic field distribution of space and time for a geological survey and geophysical prospecting methods in geothermal exploration in the electrical Exploration is a relatively simple approach, so widely used power law. Application of electrical prospecting for underground water detection and genetic relationship of faults with the location, delineation of ground water distribution, to determine overburden thickness, the heat source location and the concealed bedrock .This paper briefly describes the geothermal exploration of several geophysical methods, and resistivity method, focusing on various geothermal areas in the use of induced polarization, respectively, symmetric four pole DC sounding method and the controlled source audio MT sounding method Looking for geothermal resources, discusses the three methods to find the mechanism and its geothermal exploration conducted a comprehensive analysis of the results.The inverted resistivity from CSAMT sounding data is not only able to detect the spatial distribution of faults, but can be inferred under certain conditions, the deep temperature geothermal fields. According to the former Soviet Union scientistsГ.А. Burma Sharansky cut out 70s of last century test by a large number of rock resistivity and temperature relationship study of the use of electrical method for deep geothermal exploration well of the underground temperature and resistivity The relationship between the proposed smaller in size within the geothermal field (taking into account the case of logging data) the use of CSAMT resistivity inversion predicted deep temperature geothermal field methods and techniques, then discusses the method of practical application.The main work finished:1. Briefly discusses the causes of geothermal fields and classification of the causes of the geothermal field and its vertical distribution, describes the water structure associated with the fault zone and deep fault;2. Respectively, using the induced polarization method, symmetric four pole DC sounding method and controlled source audio MT sounding method in different areas in search of geothermal energy are examples analyzed.3. In order to establish a simple geological model, the temperature and resistivity of the relationship between the analysis of temperature change on the resistivity of the rock;4. In the known geothermal field on the resistivity sounding method of technical experiments and study rock resistivity and rock temperature coefficient on the temperature calculation results, combined with the actual survey results, discuss with the resistivity parameters inferred deep geothermal field, the temperature is feasible.Corresponding to different geological conditions, the exploration of different ways, often a single geophysical method exist Equations. Different geothermal fields by using a different analysis of the effectiveness of geophysical methods, that the use of integrated geophysical methods, geophysical interpretation of the results with other multi-parameter method, combined with the inferred interpretation of geological features, make the results more reliable.