| 講演要旨(和文) | | これまでに提案されてきているVibroseis deconvolutionのうち、伝統的で実用的な手法は、通常のminimum-phase deconvolutionに先立ち周波数領域で振源のパワースペクトラムで割り算を行うzero-phase inverse filterを適用する手法と、Klauder waveletをminimum-phase equivalentに変換後にminimum-phase deconvolutionを適用する方法に大別される。本研究では、これらの実績のあるVibroseis deconvolutionの手法との類似性に基づいて、ACROSS deconvolutionの有効性について検討した。講演では、カナダ・アクィストアCCSサイトにおいてACROSSを用いて取得されたフィールドデータに適用した結果について紹介する。 |
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| | 講演要旨(英文) | | Several methods have been developed for deconvolution of Viboseis data of which frequency range is limited. One approach is to apply a zero-phase inverse filter to remove the Klauder wavelet, followed by a minimum-phase deconvolution. The amplitude of the inverse filter is defined by the inverse power spectrum of the source. Another approach is to design a filter that converts the Klauder wavelet to its minimum-phase equivalent. Based on such traditional methods of Vibroseis deconvolution, effectiveness of ACROSS deconvolution has been investigated in this study. Some results of such application to synthetic and field data are reported including a case study using ACROSS data acquired at the Aquistore CCS field in Saskatchewan, Canada. |
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