Print Email Facebook Twitter Autofocus imaging: Image reconstruction based on inverse scattering theory Title Autofocus imaging: Image reconstruction based on inverse scattering theory Author Behura, J. Wapenaar, C.P.A. Snieder, R. Faculty Civil Engineering and Geosciences Department Geoscience & Engineering Date 2014-06-30 Abstract Conventional imaging algorithms assume single scattering and therefore cannot image multiply scattered waves correctly. The multiply scattered events in the data are imaged at incorrect locations resulting in spurious subsurface structures and erroneous interpretation. This drawback of current migration/imaging algorithms is especially problematic for regions where illumination is poor (e.g., subsalt), in which the spurious events can mask true structure. Here we discuss an imaging technique that not only images primaries but also internal multiples accurately. Using only surface reflection data and direct-arrivals, we generate the up- and down-going wavefields at every image point in the subsurface. An imaging condition is applied to these up- and downgoing wavefields directly to generate the image. Because the above algorithm is based on inverse-scattering theory, the reconstructed wavefields are accurate and contain multiply scattered energy in addition to the primary event. As corroborated by our synthetic examples, imaging of these multiply scattered energy helps eliminate spurious reflectors in the image. Other advantages of this imaging algorithm over existing imaging algorithms include more accurate amplitudes, target-oriented imaging, and a highly parallelizable algorithm. To reference this document use: http://resolver.tudelft.nl/uuid:6b6317a1-9e4f-4d6b-bb2c-9e2d803e6625 DOI https://doi.org/10.1190/geo2013-0398.1 Publisher Society of Exploration Geophysicists ISSN 0016-8033 Source Geophysics, 79 (3), 2014 Part of collection Institutional Repository Document type journal article Rights © 2014 Society of Exploration Geophysicists Files PDF 305713.pdf 2.37 MB Close viewer /islandora/object/uuid:6b6317a1-9e4f-4d6b-bb2c-9e2d803e6625/datastream/OBJ/view