著者

廣岡 伸幸 芦田 讓 佐々 宏一

出版者

石油技術協会

雑誌

石油技術協会誌 (ISSN:03709868)

巻号頁・発行日

vol.58, no.3, pp.237-244, 1993

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In the present paper, the algorithm for automatic picking of seismic reflection on seismograms is proposed.<br>The procedure of proposed algorithm is as follows.<br>1. The seismograms are transformed to the maximum amplitude seismograms which contain the amplitudes on both all peaks and all troughs.<br>2. The time to start the picking of reflection is assigned on each trace in the maximum amplitude seismograms.<br>3. A lateral continuity search between the traces on seismograms is carried out by use of amplitude ratio, cross-correlation coefficients and semblance across the traces in order to define reflection segments.<br>4. Each segment is classified into grades according to magnitude of amplitude and length of segment.<br>5. If necessary, after some kinds of scaling are applied to all segments for decreasing the segments to be plotted, the segments are displayed to make cross-section.<br>Judging from the results in model studies of the synthetic seismograms and the output from velocity analysis in which this algorithm was applied, it was concluded that the picking of seismic reflection on seismograms was carried out with enough accuracy.