Improving the efficiency of seismic exploration systems based on the use of pseudo-random sweeps: Mathematical modeling

Dmitry Alexandrovich Alekseev 1, 2, * Alexey Alekseevich Goncharov 1, Sergey Andreevich Tikhotsky 1, 2, Sergey Vladimirovich Fomichev 1, 2, Sergey Vladimirovich Golovin 1 and Andrey Yurievich Razin 1

1 Moscow Institute of Physics and Technology (National Research University), Lab of the borehole, engineering and exploration geophysics, Dolgoprudny, Russia.
2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia.
 
Research Article
International Journal of Science and Research Archive, 2024, 13(02), 2206–2214.
Article DOI: 10.30574/ijsra.2024.13.2.2345
Publication history: 
Received on 28 October 2024; revised on 04 December 2024; accepted on 07 December 2024
 
Abstract: 
The study explores the potential to improve seismic imaging resolution using broadband pseudorandom sweep signals and outlines the corresponding requirements for seismic acquisition systems. We analyze the quality of the resulting seismic images of a 2D inhomogeneous velocity structure using a synthetic vibroseismic dataset modeled for a series of sweep signals constructed based on pseudorandom code sequences (PRCS) of mechanical load pulses. The study demonstrates that the detailed seismic images showing main reflecting boundaries can be recovered by means of correlation processing of the vibroseismic data. It can be seen, through their comparison with single-pulse mode seismograms, that the imaging accuracy achieved with a particular PRCS sweep signal primarily depend depends on the pulse duration.
 
Keywords: 
Seismic acquisition systems; Vibration seismic; Vibroseis; Seismic source sweep; Seismic reflection; Correlation processing; Impulse response; Pseudorandom code sequence
 
Full text article in PDF: 
 
Copyright information: 

Copyright © 2024 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0