Green’s functions and propagator matrices are both solutions of the wave equation, but whereas Green’s functions obey a causality condition in time (G = 0 for t < 0), propagator matrices obey a boundary condition in space. Marchenko-type focusing functions focus a wave field in space at zero time. We discuss the mutual relations between Green’s functions, propagator matrices and focusing functions, avoiding up-down decomposition and accounting for propagating and evanescent waves. We conclude with discussing a Marchenko-type Green’s function representation, which forms a basis for extending the Marchenko method to improve the imaging of steeply dipping flanks and to account for refracted waves.
|Title of host publication||84th EAGE Annual Conference & Exhibition 2023|
|Number of pages||5|
|Publication status||Published - 2023|
|Event||84th EAGE ANNUAL Conference and Exhibition 2023 - Vienna, Austria|
Duration: 5 Jun 2023 → 8 Jun 2023
Conference number: 84
|Conference||84th EAGE ANNUAL Conference and Exhibition 2023|
|Abbreviated title||EAGE 2023|
|Period||5/06/23 → 8/06/23|
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