ESTIMATION OF ELASTIC STRESS-RELATED PROPERTIES OF SUBBOTOM SEDIMENTS VIA INVERSION OF ULTRA AND VERY HIGH-RESOLUTION SEISMIC DATA

1 Seismic Data Analysis Centre of the Lomonosov Moscow State University, Moscow, Russia

2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

3 Moscow Institute of Physics and Technology, Moscow, Russia

4 Lomonosov Moscow State University, faculty of geology, Moscow, Russia

* e-mail: a.pirogova@sc-lmsu.com

Abstract. The paper provides overview of several seismic inversion approaches and their application to ultra and very high-resolution marine seismic datasets. The importance of seismic inversion is determined by the current demands of offshore engineering industry in estimates of elastic stress-related parameters of near-surface and subbotom sediments. To meet these demands seismic inversion methods that facilitate estimates of elastic properties of the subsurface must be developed for very high-resolution data. Several problems prevent successful application of seismic inversion to high-resolution datasets. Firstly, borehole measurements that are routinely applied to constrain seismic inversion are almost always absent for the offshore near-surface. Secondly, ultra and very high-resolution seismic data are acquired in high frequency ranges and low-frequency information is absent in such datasets. Elaboration of seismic inversion methods for very high-resolution data is important both for practical and scientific purposes. In the paper, we share our experience in application of acoustic post-stack inversion and AVA pre-stack inversion to ultra and very high-resolution marine seismic datasets.

Keywords: seismoacoustic inversion, elastic properties, site survey.

About the authors

PIROGOVA Anastasia S. – leading geophysicist, Seismic Data Analysis Centre of the Lomonosov Moscow State University. 119992, Moscow, Leninsky Gory, 1, build. 77 E-mail: a.pirogova@sc-lmsu.com

TIKHOTSKY Sergey A. – Assoc. Member of the RAS, Dr. Sci. (Phys. and Math.), director, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. Tel .: +7 (499) 766-26-56; head of laboratory, Moscow Institute of Physics and Technology. 141701, Moscow reg., Dolglprudny, Institutsky lane, 9. E-mail: sergey.tikhotskiy@yandex.ru

TOKAREV Mikhail Yu. – Cand. Sci. (Tech.), deputy dean, Lomonosov Moscow State University, faculty of geology. Russia, 119991, Moscow, Leninsky gory, 1. E-mail: mjtokarev@gmail.com

SUCHKOVA Alina V. – graduate student, Lomonosov Moscow State University, faculty of geology. 119991, Moscow, Leninsky Gory, 1. E-mail: alinasuchkova1123@gmail.com

Cite this article as: Pirogova A.S., Tikhotsky S.A., Tokarev M.Yu., Suchkova A.V. Estimation of elastic stress-related properties of subbotom sediments via inversion of ultra and very high-resolution seismic data, Geofizicheskie Protsessy i Biosfera (Geophysical Processes and Biosphere), 2019, vol. 18, no. 4, pp. 191–202 (in Russian). https://doi.org/10.21455/gpb2019.4-16

English version: Izvestiya, Atmospheric and Oceanic Physics, 2019, vol. 55, iss. 11. ISSN: 0001-4338 (Print), 1555-628X (Online). https://link.springer.com/journal/volumesAndIssues/11485