Análisis de las ondas de superficie para construir modelos de velocidades someros: El rol de los modos superiores
Geophysical methods present unique advantages, including a strong theoretical basis, the ability to perform the same basic measurement in the laboratory and eld, and the non-invasive nature of the tests. The reason for studying surface wave in the eld of petroleum engineering is mainly to provide a...
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2014
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| Accés en línia: | http://hdl.handle.net/10872/5787 |
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| Sumari: | Geophysical methods present unique advantages, including a strong theoretical basis, the ability to perform the same basic measurement in the laboratory and eld, and the non-invasive nature of the tests. The reason for studying surface wave in the eld of petroleum engineering is mainly to provide a near surface velocity model to be used for correcting seismic. Nonetheless, information regarding the surface waves could be also important in land hydrocarbon exploration for prestack depth migration and to provide robust techniques for the attenuation of surface wave noise . Among di erent techniques that are used for near surface velocity models estimation, recent use of surface wave analysis exploit the ground roll present in seismic reection records to get the near surface geology and ultimately, a better image of the reservoir. Surface waves are widely applied to retrieve the shear wave velocity (VS) model, but certainly for seismic exploration the compressional wave velocity ( VP ) is more relevant, so, it is important to assess the possibility to get both VS and VP from the inversion method. Surfaces waves are considered poorly sensitive to VP , but in this work there is an interest to show that by including higher modes this sensitivity could be improved. |
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