Real-time Inversion Method Based On The Synchronous Detection Of MT

Geophysical,also known as exploration geophysical or geophysical exploration,which is a widely used science in researching in and interpreting of geological structure or detection of underground resources.At present in the field of geophysical exploration,mainly include of magnetic exploration,gravity exploration,radioactive exploration,seismic exploration and other exploration methods and means,and the magnetotelluric method(MT method)is one of the electrical exploration methods.The MT method is a geophysical exploration method to study the structure of underground geologic bodies based on the natural alternating electromagnetic waves incident vertically at high altitude as the excitation field source,observing the electric field and the magnetic field mutually orthogonal in the surface.It was widely used in mineral resources exploration,oil resources exploration,gas resources exploration,groundwater resources search,crustal and upper mantle structure exploration,regional geological survey,earthquake prediction,and so on,because of without artificial source,high depth of detection,do well in high resistance shield,strong resolution,etc.The paper carried out a more detailed study in analyzing the principle of MT method,the structure,working mode and data acquisition of MT synchronous detection device,the establishment of three detection models,the data analysis and processing based on LabVIEW,real-time inversion of the synchronous detection and the field detection examples.The main research content is as follows:(1)Analyzed the characteristics of single point data under synchronous detection,establish the mathematical model of single point,data processing and inversion interpretation based on LabVIEW,and proposed the method of refinement Bostick inversion and a regional coverage synchronous detection method,achieved synchronous real-time inversion.(2)Designed a comprehensive magnetotelluric system of MT method for achieving synchronous detective and real-time inversion,the system include of detective inversion host and detective inversion extension.(3)Using the synchronous detection and real-time inversion method and system of the MT for on-site observation tested,verified the synchronous detection and real-time inversion method proposed by the paper through the field test examples.