Practices And Recognitions Of Integrated Geophysical Interpretation Method To Geological Structure Research

This thesis is based on the sub-topic of the Territorial Resources Surveys, thegeological-geophysical comprehensive interpretation of gravity, magnetic, electricalsectional in Middle and Upper Yangtze and its’ oil and gas prospecting area （code:1212011220750-03）. For complex geological conditions, a single geophysicalexploration method is difficult to obtain high quality data, unable to meet theincreasing exploration accuracy requirement, and various geophysical explorationmethods all have limitations, this paper put forward to the practices and recognitionsof integrated geophysical interpretation method to geological structure research.Through comprehensive geophysical prospecting method in theoretical research,development present situation and existing problems, this essay will fully explain thenecessity of the research, which combines with the actual geological conditions. basedon the huge collection of readings, this essay expounded the theoretical foundation ofthe gravity, magnetic and magnetotelluric method. Meanwhile, this eassy demonstrated the advantages and disadvantages of various geophysical exploration methods.Then, in the case of the research of the geological structure in east wulong. Accordingto rhe rock physical parameters of east of Wulong district and adjacent areas, mainlybased on integrated Geophysical Data of gravity, magnetic, electrical, combined withrelevant geological data, carried out a detailed comprehensive analysis andinterpretation of geophysical data of geological structure of the east of Wulong district.Made the following major cognitive and outcomes:1. Starting with the theory of Incompatible Integrated Geophysical, deriving therelevant theoretical formula, researching gravity, magnetic, electrical prospectingmethods and techniques. Demonstrating integrated geophysical method in complexgeological areas can take advantage of the strengths and weaknesses of differentexploration methods complement each other, mutual authentication, integratedinterpretation of various geophysical methods and forward and inverse analysis is aneffective method of exploration efficiency.2.Set up the tectonic theory models, according to the model inversion results, make an abnormal structure comparative analysis, summarize the abnormalcharacteristics of typical structures, including fold and fault. Provides the structurejudgment basis for the integrated interpretation.3. Integrate analysis the date of gravity, magnetic, electrical physical parametersof study area, summarize the characteristics of gravity, magnetic, electrical of the eastof Wulong district. Divide the study area into5electrical layers, propose thecharacteristics of gravity, magnetic, electrical,working clear premise for integratedgeophysical interpretation of geophysical.4. Qualitative analysis and interpretation of abnormal on gravity, magnetic,electrical sectional view of the east of Wulong district. According to the lithologyparameters and other information, preliminary inferred the causes of abnormal.Establish the initial geological-geophysical model and analyze simple structure, faultmodels through integrated geophysical anomalies, a comprehensive analysis of thegeophysical study area, compared the forward modeling simulation results with theresults measured by continuously changing, and determine the final geologicalinterpretation model.5. Integrated geophysical inversion results and geological data and geologicalinterpretation model, geological-geophysical comprehensive explanation, concludedtstratigraphic distribution of the study area, structure morphology, distribution andother fracture spatial distribution.