Time-Domain Spectral Induced Polarization Based on Pseudo-random Sequence

• Published in: Pure and applied geophysics Vol. 170; no. 12; pp. 2257 - 2262
• Main Authors: Li, Mei, Wei, Wenbo, Luo, Weibin, Xu, Qindong
• Format: Journal Article
• Language: English
• Published: Basel Springer Basel 01.12.2013; Springer Nature B.V
• Subjects: Correlation; Correlation analysis; Devices; Earth and Environmental Science; Earth Sciences; Exploration; Frequency response; Geophysics/Geodesy; Identification systems; Induced polarization; Mathematical models; Mineral exploration; Mineral resources; Noise reduction; Polarization; Prospecting; Random variables; Spectra; Spectrum analysis; Technology; Pseudo-random sequence; correlation identification technology; SIP; MTEM
• ISSN: 0033-4553; 1420-9136
• DOI: 10.1007/s00024-012-0624-z

To reduce noise during electrical prospecting, we hereby propose a new method using correlation identification technology and conventional electrical exploration devices. A correlation operation can be carried out with the transmitted pseudo-random sequence and received time signal to suppress the random noise, and the time-domain impulse response and frequency response of the frequency domain of the underground media can be obtained. At the same time, using a dual Cole–Cole model to fit a complex resistivity spectrum, which is close to the frequency response, we can get a variety of induced polarization parameters and electromagnetic parameters of subsurface, which can provide more useful information for the exploration of mineral resources. This time domain prospecting method can effectively improve the efficiency of the spectral induced polarization method. In this article, we have carried out theoretical calculations and a simulation to prove the feasibility of such a method.