| 講演要旨(和文) | | 最適な多重反射波抑制アルゴリズムを選択するには、多重反射波を含む処理データの性質及びデータ取得仕様について詳細な検討が必要である。本研究では、多重反射波の多様な予測手法に関わる開発を行い、発震記録及び重合記録上で多重反射波の振幅強度及び分布の可視化を可能とした。併せて、波面構築法を用いた多重反射波伝播経路の把握を通じて、'Surface-related'型あるいは層間型等の多重反射波の識別に関する考察を加えた。さらに、こうした多重反射波予測を通じて、対象プロスペクトの構造形態及び地域特性、発震記録の品質及びデータ取得仕様に合わせた最適な多重反射除去処理手法を選択するワークフローを構築した。 |
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| | 講演要旨(英文) | | Multiple suppression remains one of the key challenges in reflection data processing. In order to select the optimum workflow and algorithms for multiple suppression, detailed investigation for both the characteristics of multiple reflections and data acquisition geometries is indispensable. We proposed practical approach to visualization and prediction of various multiple reflections, concentrating the pattern recognition and reflection strength of surface-related and interbed multiples, followed by the identification for multiple raypath using wavefront construction method. The complex multiples can be estimated by the data-driven algorithm such as SRME(Surface-related Multiple Elimination) in addition to the deterministic approach based on multiple periodicity and residual moveout. The hybrid method of the identification and visualization of predicted multiples have proven to be quantitative interpretation tool for both stratigraphic analysis and reservoir characterization. |
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