| 講演要旨(和文) | | メキシコ湾北部にて、超高分解能３次元弾性波探査を実施した。超高分解能３次元弾性波探査は、海底油田掘削に伴う地質災害リスク軽減を目的として注目を集めており、従来の３次元探査や高分解能２次元探査では取得できなかった詳細な地質情報を得ることができる。本発表では、今回探査に使用したシステムを紹介するとともに、探査結果を示し、超高分解能３次元弾性波探査の有用性を示す。 |
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| | 講演要旨(英文) | | Preliminary results from data collected along mid-slope depths in the northern Gulf of Mexico are very promising in regard to applicability of short offset, ultra-high-resolution, three-dimensional (UHR3D) seismic methods in the detection and delineation of geohazards. Penetration of greater than 2s two way travel time blow seabed was achieved with a 3D streamer system comprising 18 streamers that were 100m in length and a 210in3 GI air gun. Apparent subsurface horizontal resolution is in the order of 16m, and vertical resolution is as high as 1.6m. Seafloor resolution is consistent with the natural bin size of 3.125m x 6.25m. |
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