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:
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 acquired in which the noise and the static shift effect have been suppressed, and apparent resistivity and phase curves of each point are acquired after processing with conventional method.
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 acquired in which the noise and the static shift effect have been suppressed, and apparent resistivity and phase curves of each point are acquired after processing with conventional method.