O.O. Verpakhovska, FINITE-DIFFERENCE MODELING OF THE WAVEFIELD ON THE SEISMOMETRY OBSERVATIONS ON NW BLACK SEA SHELF

https://doi.org/10.15407/gpimo2022.03.027

O.O. Verpakhovska, Dr. Sci. (Phys. & Math.), Leading Researcher
e-mail: alversim@gmail.com
ORCID 0000-0002-6607-2360

V.P. Kobolev, NAS Corresp. Member, Dr. Sci. (Geol.), Prof., Chief Researcher
e-mail: kobol@igph.kiev.ua
ORCID 0000-0001-5625-5473

V.M. Pylypenko, Dr. Sci. (Phys. & Math.), Chief Researcher
e-mail: vpylypenko@gmail.com

S.I. Subbotin Institute of geophysics of the NAS of Ukraine
32 Palladin Ave, Kyiv, 03142, Ukraine

FINITE-DIFFERENCE MODELING OF THE WAVEFIELD ON THE SEISMOMETRY OBSERVATIONS ON NW BLACK SEA SHELF

In current seismic studies, special attention is given to the correctness of both the processing methods and the results of their using. In particularly, this applies to the migration procedure, which allows reproducing the deep structure of the research area directly from the observed wave field. In the Institute of Geophysics named after SI. Subbotin of the National Academy of Sciences of Ukraine, for many years, methods of migration and modeling of the wave field, which are theoretically based on the finite-difference method of solving differential equations, have been developed. Modeling the wave field makes it possible to identify useful waves in the real observed seismic field for the effective formation of a migration image of the geological environment and to confirm the correctness and accuracy of the reproduction of various types of disturbances on it.

S.I. Subbotin Institute of geophysics of the National Academy of Sciences of Ukraine in 2013 on the continental slope of the northwestern part of the Black Sea, seismometry observations with reflection CDP (Common Deep Point) profiles were carried out. When processing the registered wave fields to form a depth image of the geological section, post-stack full-wave finite-difference migration was used. As a tool for assessing the correctness of the obtained results, the finite-difference modeling of the wave field is considered, which is based on the solution of the wave equation on a grid with a seven-point pattern.

Keywords: Black Sea shelf, finite-difference post-stack migration, CDP-reflection data, seismic exploration.

References

1.   Verpahovskaya A.O. Effektivnost' obrabotki dannyh morskoj sejsmorazvedki s primeneniem konechno-raznostnoj migracii. Geologiya i poleznye iskopaemye Mirovogo okeana. 2017. 49 (3). S. 73—85. http://dspace.nbuv.gov.ua/handle/123456789/145179

2.   Verpahovskaya A.O., Pilipenko V.N., Kobolev V.P. Osobennosti obrabotki morskih sejsmicheskih nablyudenij s ispol'zovaniem konechno-raznostnoj polnovolnovoj migracii. Geofizicheskij zhurnal. 2013. T.35, № 5. S. 187—195. https://doi.org/10.24028/gzh.0203-3100.v35i5.2013.116447

3.   Kobolev V.P., CHulkov S.S., Ganiev A.Z., Kozlenko YU.V., Zaharov I.G., Lyubickij A.A., Ignat'ev S.M. 74-j rejs NIS «Professor Vodyanickij» — kompleksnye ekspedicionnye issledovaniya na kontinental'nom sklone severo-zapadnogo shel'fa CHernogo morya. Geologiya i poleznye iskopaemye Mirovogo okeana. 2013. № 3. C. 175—180. http://dspace.nbuv.gov.ua/handle/123456789/99520

4.   Orlenok V.V. Morskaya sejsmoakustika: ycheb. posobie. Kaliningrad: Kaliningrad. un-t., 1997. 150 s.

5.   Pinus O.V., Koloskov V.N., Hipeli R.V., Nadezhkin D.V. Sikvens-stratigrafiya neogenchetvertichnogo razreza severo-zapadnoj akvatorii CHernogo morya. Geologiya nefti i gaza. 2014. №2. S. 46—53.

6.   Samarskij A.A. Teoriya raznostnyh skhem. Moskva: Nauka, 1983. 616 s.

7.   Hatton L., Uerdington M., Mejkin Dzh. Obrabotka sejsmicheskih dannyh. Teoriya i praktika. Moskva: Mir, 1989. 216 s.

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