SEISMIC MICROZONING OF THE BERYAMBINSKAYA AREA BASED ON 2D SEISMIC SURVEY DATA

E. A. Khogoev 1, M. L. Shemyakin 2

1 Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia; 2 Novosibirsk State University, Novosibirsk, Russia

The paper describes a method to analyse the spectrum of microseisms based on standard seismic survey records. As a source of data for the analysis, the authors use seismic trace portions located at a distance of more than 2 km from a seismic source point and with a record time of 3.5–4 sec, after the passage of the basic train of waves generated by the source. After spectra have been calculated for these trace portions, the spectra are averaged in receiver points. As a result, the averaged spectrum of microseisms is shaped for the profile. The CDP shooting grid density enables tracing changes in the spectrum of microseisms along the profile. The paper provides results of microseisms mapping for the Beryambinsky license block. Along the profile crossing a producing well, there is an abnormal spectrum of medium frequencies, with an extremum within 10–20 Hz. Besides, extended anomalies being similar in the spectral content of microseisms were discovered within the license block, which may be associated with other pools.

Key words: seismic survey, spectrum of microseisms, oil and gas pools prediction.

DOI 10.20403/2078-0575-2017-2-104-111 

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