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• W3205457534 abstract "Vertical seismic profiling (VSP) is an effective technique to provide high-resolution seismic images of the reservoir area. However, the quality of the images is limited by the poor illumination of primary reflection wave. In conventional VSP imaging, only the upgoing primaries are used. Adding free-surface–related multiples into the imaging process can significantly improve the coverage of the illuminated area. Conventional migration methods using multiples need the complex process of multiple prediction. Data-to-data migration (DDM) is an effective imaging technique for multiples in which the recorded data is migrated directly. To improve the imaging quality of DDM in VSP imaging, we propose separating the wavefield into downgoing and upgoing components using Hilbert transform when reverse-time migration (RTM) is implemented in DDM, and the inverse-scattering imaging condition is further applied to the decomposed wavefields. The proposed method eliminates low-frequency noises and false images generated from the conventional cross-correlation imaging condition, and further enhance the illumination in the VSP imaging. Synthetic examples and application to a walkaway field data demonstrate that it can attenuate the noise and improve the imaging resolution effectively. By using DDM with inverse scattering imaging condition and wavefield decomposition based on Hilbert transform, VSP imaging using free-surface–related multiples becomes a practical complement for conventional VSP imaging." @default.
• W3205457534 created "2021-10-25" @default.
• W3205457534 creator A5026540221 @default.
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• W3205457534 date "2021-10-14" @default.
• W3205457534 modified "2023-09-28" @default.
• W3205457534 title "VSP Imaging Using Free-Surface Multiples With Wavefield Decomposition: Synthetic and Field Data Examples" @default.
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• W3205457534 doi "https://doi.org/10.3389/feart.2021.730184" @default.
• W3205457534 hasPublicationYear "2021" @default.
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