Method for simulating local prestack depth migrated seismic images

作者: Isabelle Lecomte

DOI:

关键词: Time domainAlgorithmRay tracing (graphics)Fast Fourier transformWavefrontPoint (geometry)ScatteringGeodesyEikonal equationTransformation (function)Geography

摘要: Method simulating local prestack depth seismic migrated images from target models, without using either real or synthetic recorded data. The input is a background model and some surveys, with the possibility of defining acquisition surfaces to describe any geometry potential surveys. In addition, detailed models are given, generated different type input, such as parameter grids, interpreted time- depth- horizons attributes, reservoir other .In most efficient application invention, point in chosen by user will act node for Green's functions calculation between surveys/acquisition that point. can be calculated many ways (classic ray tracing, Wavefront Construction, Eikonal solvers possible methods), mandatory information being slowness vectors form sum vector called scattering wavenumber. According survey choices, wavenumbers extracted, various sub-selections, sorting, re-ordering, used create filters wavenumber domain. Amplitudes, pulses, pattern, Fresnel-zone effects, effects included filters. latter then applied each give simulated image after transformation, like Fast Fourier Transform, domain space For better accuracy, neighboring nodes merged classic section. A variant present invention simulate traces time inner core build apply domains, Ground Penetrating Radar, possibly acoustical medical imaging.

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