Abstract: A surface wave prospecting method for jointly extracting Rayleigh wave frequency dispersion characteristics in a seismoelectric field. A surface wave prospecting method includes following steps of: acquiring jointly acquired data, where the jointly acquired data includes seismic wave data and electric field data; carrying out jointly imaging processing on jointly acquired data to obtain a superposed frequency dispersion spectrum; carrying out extraction processing on superposed frequency dispersion spectrum to obtain a frequency dispersion curve, outperforming inversion processing on frequency dispersion curve to obtain a stratum structure profile. As seismic wave data and electric field data are adopted to carry out combined imaging processing to obtain superposed frequency dispersion spectrum, multi-mode frequency dispersion curve is extracted, multiplicity of solutions of inversion is greatly reduced during inversion, precision and stability of surface wave prospecting are greatly improved.

Abstract: A surface wave prospecting method for jointly extracting Rayleigh wave frequency dispersion characteristics in a seismoelectric field. A surface wave prospecting method includes following steps of: acquiring jointly acquired data, where the jointly acquired data includes seismic wave data and electric field data; carrying out jointly imaging processing on jointly acquired data to obtain a superposed frequency dispersion spectrum; carrying out extraction processing on superposed frequency dispersion spectrum to obtain a frequency dispersion curve, outperforming inversion processing on frequency dispersion curve to obtain a stratum structure profile. As seismic wave data and electric field data are adopted to carry out combined imaging processing to obtain superposed frequency dispersion spectrum, multi-mode frequency dispersion curve is extracted, multiplicity of solutions of inversion is greatly reduced during inversion, precision and stability of surface wave prospecting are greatly improved.

Abstract: Disclosed is an electromagnetic prediction method for concealed orebodies. A factor associated with an observation direction and a factor associated with a frequency are retrieved from tensor impedance data after static shift recognition and correction. An electromagnetic recognition factor including anisotropic characteristics is constructed. A probability of a developed orebody in a particular underground depth range of a target area is then inferred by using the electromagnetic recognition factor alone or as a component of comprehensive prediction information. Due to the full use of a potential correlation between anisotropic characteristics of frequency domain electromagnetic fields and an apparent metal factor and two-dimensional (or three-dimensional) extended concealed orebodies, the success rate of predicting spatial locations and attributes of the concealed orebodies is improved.

Abstract: Disclosed is an electromagnetic prediction method for concealed orebodies. A factor associated with an observation direction and a factor associated with a frequency are retrieved from tensor impedance data after static shift recognition and correction. An electromagnetic recognition factor including anisotropic characteristics is constructed. A probability of a developed orebody in a particular underground depth range of a target area is then inferred by using the electromagnetic recognition factor alone or as a component of comprehensive prediction information. Due to the full use of a potential correlation between anisotropic characteristics of frequency domain electromagnetic fields and an apparent metal factor and two-dimensional (or three-dimensional) extended concealed orebodies, the success rate of predicting spatial locations and attributes of the concealed orebodies is improved.

Abstract: Data obtained with an electromagnetic energy transmitter in borehole to surface electromagnetic (BSEM) transmitter is processed. The processed data provides measures of detected electromagnetic fields, induced polarization and electromagnetic well logging information of interest for surveying and mapping of subsurface formations.

Abstract: Data obtained with an electromagnetic energy transmitter in borehole to surface electromagnetic (BSEM) transmitter is processed. The processed data provides measures of detected electromagnetic fields, induced polarization and electromagnetic well logging information of interest for surveying and mapping of subsurface formations.

Abstract: An electromagnetic energy transmitter is provided for induced polarization logging with a borehole to surface electromagnetic (BSEM) transmitter. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy for the surveys. The transmitter affords more accurate measurements of its position in the well borehole. The transmitter also senses pressure and temperature conditions at its borehole location to provide indications of detected potential problems in the well from the survey or other sources, and to reduce risks and enhance safety and quality of the operations.

Abstract: An electromagnetic energy transmitter is provided for induced polarization mapping with a borehole to surface electromagnetic (BSEM) transmitter. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy. An array of receivers spaced over an area of the earth surface senses the induced polarization response to the emitted electromagnetic energy in areas of interest for mapping. Maps are formed of the induced polarization responses sensed by the array of receivers.

Abstract: The present invention is a method of poles configuration with four poles inter-combination for marine electromagnetic surveying and acquisition. The method of the present invention adopts six horizontal electric field components with four poles inter-combination. The six horizontal electric field components are respectively constituted from tri-pins grounding electrodes of four poles pairwise. One of the pins of each of the tri-pins grounding electrodes and the pins of the other three tri-pins grounding electrodes mutually constitute the six horizontal electric field components. The data for electromagnetic field over time series are simultaneously recorded. The present invention effectively ensure that the electric field recording with an angle less than 22.5 degree to the activation direction is achieved regardless of the orientation of the acquisition station, and that the worst effective activation signal may reach 76.5% of that under collinear activation.

Abstract: An electromagnetic energy transmitter is provided for induced polarization logging with a borehole to surface electromagnetic (BSEM) transmitter. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy for the surveys. The transmitter affords more accurate measurements of its position in the well borehole. The transmitter also senses pressure and temperature conditions at its borehole location to provide indications of detected potential problems in the well from the survey or other sources, and to reduce risks and enhance safety and quality of the operations.

Abstract: An electromagnetic energy transmitter is provided for induced polarization mapping with a borehole to surface electromagnetic (BSEM) transmitter. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy. An array of receivers spaced over an area of the earth surface senses the induced polarization response to the emitted electromagnetic energy in areas of interest for mapping. Maps are formed of the induced polarization responses sensed by the array of receivers.

Abstract: An electromagnetic energy transmitter is provided for borehole to surface electromagnetic (BSEM) surveying. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy for the surveys. The transmitter affords more accurate measurements of its position in the well borehole. The transmitter also senses pressure and temperature conditions at its borehole location to provide indications of detected potential problems in the well from the survey or other sources, and to reduce risks and enhance safety and quality of the operations.

Abstract: A method for geochemical gradient exploration includes the steps of: densely collecting soil samples and gas samples along a longitudinal direction in a certain depth range of a superficial layer; collecting soil samples and gas samples in the range from 1 meter to 50 meters deep by a special drilling machine; after analyzing and processing the geochemical indicators, extracting and figuring the bathymetric curve and the curve of gradients, the section curve and section curve of gradient along a certain direction, contour section of various indicators and contour section of various indicator gradients, so as to process the data and to represent the figure in 3D. More information, especially the variation information along the longitudinal direction, can be obtained. Gradient prospecting is realized by collecting samples along the depth direction and by analyzing variations in geochemical indicators along the depth.

Abstract: The present invention is a method of poles configuration with four poles inter-combination for marine electromagnetic surveying and acquisition. The method of the present invention adopts six horizontal electric field components with four poles inter-combination. The six horizontal electric field components are respectively constituted from tri-pins grounding electrodes of four poles pairwise. One of the pins of each of the tri-pins grounding electrodes and the pins of the other three tri-pins grounding electrodes mutually constitute the six horizontal electric field components. The data for electromagnetic field over time series are simultaneously recorded. The present invention effectively ensure that the electric field recording with an angle less than 22.5 degree to the activation direction is achieved regardless of the orientation of the acquisition station, and that the worst effective activation signal may reach 76.5% of that under collinear activation.

Abstract: Disclosed herein is a three dimensional small bin electromagnetic consecutive array data acquisition method used in oil exploration comprising the steps of recording data using small bin lattices on execution of arrangement electrodes, each acquisition station (Ex, Ey) records the natural electromagnetic field time series data with the same acquisition parameter simultaneously; interference is removed first, for recorded data processing to get interference-free data; for border points and center point, the recording point serves as center point, and the same component from adjacent two points to total points area added together to obtain the average value of electric field data at time domain for each observation point; for corner points, the average values of the same electric field component from adjacent two points to total survey points toward bin direction is calculated; the electric field components acquired in maximum space serve as the new electric field values respectively; new time series data acqui

Abstract: An electromagnetic energy transmitter is provided for borehole to surface electromagnetic (BSEM) surveying. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy for the surveys. The transmitter affords more accurate measurements of its position in the well borehole. The transmitter also senses pressure and temperature conditions at its borehole location to provide indications of detected potential problems in the well from the survey or other sources, and to reduce risks and enhance safety and quality of the operations.

Abstract: Disclosed herein is a three dimensional small bin electromagnetic consecutive array data acquisition method used in oil exploration comprising the steps of recording data using small bin lattices on execution of arrangement electrodes, each acquisition station (Ex, Ey) records the natural electromagnetic field time series data with the same acquisition parameter simultaneously; interference is removed first, for recorded data processing to get interference-free data; for border points and center point, the recording point serves as center point, and the same component from adjacent two points to total points area added together to obtain the average value of electric field data at time domain for each observation point; for corner points, the average values of the same electric field component from adjacent two points to total survey points toward bin direction is calculated; the electric field components acquired in maximum space serve as the new electric field values respectively; new time series data acqui