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APPLICATION OF SANMCS TECHNOLOGY FOR MARINE SEISMIC DATA PROCESSING

E. E. Khogoeva 1,2, E. A. Khogoev 1,3, M. L. Shemyakin 2, J. K. Kjerstadt 4, B. O. Rosland 4

1 A.A.Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia; 2 Novosibirsk State University, Novosibirsk, Russia; 3 Altay-Sayan Branch of Federal Research Center “Geophysical Survey of RAS”, Novosibirsk, Russia; 4 Offshore Resource Group AS, Stavanger, Norway

The article presents the results of applying the technology of spectral analysis of microseisms to marine seismic data. The fundamental differences between the software-algorithmic and methodological aspects of the processing of marine and land seismic data are described. Correlation of microseismic spectrum anomalies in the range of 4–8 and 10–15 Hz with a known oil accumulation is shown; the correspondence of another 10–15 Hz spectrum anomaly with gas condensate accumulation was also found. The conclusion about the seismic emission nature of microseism anomalies has been substantiated. The development process of seismic emission in time is considered. It was found that for each local emission zone, the beginning of the process development may have its own time. The duration of the maximum emission level phase is from 0.5 to 0.75 s. The stability of processing results is shown; local anomalies of the microseismic spectrum are traced on several parallel receivers lines that are 100 m apart from each other.

Keywords: microseismic, seismic emission, marine seismic survey, microseism spectrum, direct search for oil and gas accumulations.

DOI 10.20403/2078-0575-2020-4-53-62