Seismic wavefield divergence at the free surface
| Autor: | Everhard Muyzert, Nihed El Allouche, Ed Kragh, Nicolas Goujon, Pascal Edme |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | First Break. 36:75-82 |
| ISSN: | 1365-2397 0263-5046 |
| DOI: | 10.3997/1365-2397.2018008 |
| Popis: | This paper explores the concept of pressure measurements in a land seismic acquisition setting. We first review the theory for pressure measurements near the surface of the Earth and show the significance of the S-to-P conversion which results in the pressure being proportional to the sum of the slowness-scaled horizontal velocity fields. In the second part of this paper we test a land hydrophone prototype via a small-scale experiment to validate the pseudopressure measurement. Potential applications are briefly discussed. This study suggests that such a land hydrophone can potentially allow local and omni-directional noise attenuation, via adaptive subtraction using the pseudo-pressure data as noise model, and therefore can potentially allow sparser acquisition geometries with associated field effort and cost reduction. |
| Databáze: | OpenAIRE |
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