Reconstructing the primary reflections in seismic data by Marchenko redatuming and convolutional interferometry
نویسندگان
چکیده
منابع مشابه
Reconstructing the primary reflections in seismic data by Marchenko redatuming and convolutional interferometry
State-of-the-art methods to image the earth’s subsurface using active-source seismic reflection data involve reverse time migration. This and other standard seismic processing methods such as velocity analysis provide best results only when all waves in the data set are primaries (waves reflected only once). A variety of methods are therefore deployed as processing to predict and remove multipl...
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Recently, a novel iterative scheme was proposed to retrieve Green’s functions in an unknown medium from its single-sided reflection response and an estimate of the propagation velocity. In Marchenko imaging, these Green’s functions are used for seismic imaging with complete wavefields, including internal multiple reflections. In this way, common artifacts from these internal reflections are avo...
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Can the reflection response of the subsurface be obtained without the need to place an active source at the surface? Using numerical modeling results based on one-way wavefields, we show that the reflection response of a 3-D inhomogeneous lossless medium can be reconstructed from the crosscorrelation of its transmission response at the surface. Depending on the type of subsurface noise sources,...
متن کاملMarchenko redatuming below a complex overburden
Complex overburdens can severely distort transmitted wavefields, posing serious challenges for seismic imaging. In Marchenko redatuming, we use an iterative scheme to estimate so-called focusing functions, which can be used to redatum seismic wavefields to a specified level below the major complexities in the subsurface. Unlike in conventional redatuming methods, internal scattering in the over...
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Despite the close links between the fields of time-reversed acoustics, seismic interferometry and Marchenko imaging, a number of subtle differences exist. This paper reviews the various focusing conditions of these methods, the causality/acausality aspects of the corresponding focusing wavefields, and the requirements with respect to omnidirectional/singlesided acquisition. INTRODUCTION It has ...
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ژورنال
عنوان ژورنال: GEOPHYSICS
سال: 2016
ISSN: 0016-8033,1942-2156
DOI: 10.1190/geo2015-0377.1