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Abstract

Full waveform inversion has the potential of playing the central role in seismic imaging in the near future. In fact, its power of providing higher seismic resolution compared to pre-stack depth migration may contribute to seismic interpretation in areas which present high geological complexities. However, its success depends on the design of the seismic experiment. In fact, besides the necessity of a wide spectrum of frequencies, it is required to properly register the scattering wavefields associated to the geological targets. Otherwise, the inversion scheme is not effective. On the other hand, acquiring the scattering wavefields as a whole may be unfeasible using conventional surveys, where consecutive shot records don’t have time superposition. In this work, we abandon this condition, and extend the contrast source inversion method to handle data in which shots are superposed randomly. In our method, the deblending phase is not necessary. Applications on Marmousi model show how efficient, accurate, and stable this method is when compared to results obtained with traditional acquisition approaches. Even in very low signal to noise ratio cases, except for small artifacts, it was possible to recover all features present in the original model.

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/content/papers/10.3997/2214-4609.20149384
2011-05-23
2024-03-29
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20149384
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