Passive seismic data processing methods to identify contrast intrasalt interlayers in the geological section of the Astrakhan Arch
https://doi.org/10.18599/grs.2021.3.14
Abstract
The article examines the problem of processing microseismic noise (MN) to identify and evaluate occurrence depth of contrasting geological objects – intersalt interlayers with a potentially high formation pressure. If it is impossible to use artificial wave sources, statistic processing of passive seismic data becomes critical. Due to the accumulation of power spectral density (PSD) during a long-term recording of MN the deterministic medium effect on a random signal spectrum is identified. PSD modulation when the surface or the bottom of the layered medium is exposed to white noise is expressed in terms of the Green’s function (GF) of a wave equation. Relevant GF variations corresponding to the layers form the basis for accumulated PSD approximation, and indicate the depth and contrast of the target features.
About the Authors
E. V. Biryaltsev
Gradient Technology LLC
Russian Federation
Russian Federation
Evgeny V. Biryaltsev (13.02.1960–17.06.2021) – PhD (Physics and Mathematics), Director
Of. 516, 50, Petersburgskaya St., Kazan, 420011
A. A. Vikhoreva
Octopus LLC
Russian Federation
Russian Federation
Alexandra A. Vikhoreva – PhD (Physics and Mathematics)
10A, Gub. A. Guzhvin Av., Astrakhan, 414014
V. A. Zakharchuk
Gazprom Dobycha Astrakhan LLC
Russian Federation
Russian Federation
Vasily A. Zakharchuk – PhD (Geology and Mineralogy), Head of the Geological Department
30, Lenin St., Astrakhan, 414000
A. Yu. Komarov
Gazprom Dobycha Astrakhan LLC
Russian Federation
Russian Federation
Alexey Yu. Komarov – Deputy Director General – Chief Geologist
30, Lenin St., Astrakhan, 414000
V. V. Pykhalov
Octopus LLC
Russian Federation
Russian Federation
Viktor V. Pykhalov – DSc (Geology and Mineralogy), Deputy Chief Geologist for Seismic Operations
10A, Gub. A. Guzhvin Av., Astrakhan, 414014
O. V. Tinakin
Gazprom Dobycha Astrakhan LLC
Russian Federation
Russian Federation
Oleg V. Tinakin (19.11.1961–19.07. 2021) – Deputy Head of the Geological Department
30, Lenin St., Astrakhan, 414000
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Review
For citations:
Biryaltsev E.V., Vikhoreva A.A., Zakharchuk V.A., Komarov A.Yu., Pykhalov V.V., Tinakin O.V. Passive seismic data processing methods to identify contrast intrasalt interlayers in the geological section of the Astrakhan Arch. Georesursy = Georesources. 2021;23(3):109-117. (In Russ.) https://doi.org/10.18599/grs.2021.3.14
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