Common reflection surface stacking method — Imaging with an unknown velocity model

Müller, Thilo; Jäger, Rainer; Höcht, German

doi:10.1190/1.1820270

Cited by 54 publications

(44 citation statements)

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“…Still under the assumption of non-converted waves, the quadratic normal moveout, as used, for example in the common-reflection-surface (CRS) method (see, e.g. Tygel et al, 1997;Müller et al, 1998)…”

Section: Non-cmp Moveoutsmentioning

confidence: 99%

Quadratic normal moveouts of symmetric reflections in elastic media: A quick tutorial

Tygel

Santos

2007

Stud Geophys Geod

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The design of reflection traveltime approximations for optimal stacking and inversion has always been a subject of much interest in seismic processing. A most prominent role is played by quadratic normal moveouts, namely reflection traveltimes around zero-offset computed as second-order Taylor expansions in midpoint and offset coordinates. Quadratic normal moveouts are best employed to model symmetric reflections, for which the ray code in the downgoing direction coincides with the ray code in the upgoing direction in reverse order. Besides pure (non-converted) primaries, many multiply reflected and converted waves give rise to symmetric reflections. We show that the quadratic normal moveout of a symmetric reflection admits a natural decomposition into a midpoint term and an offset term. These, in turn, can be be formulated as the traveltimes of the one-way normal (N) and normal-incidence-point (NIP) waves, respectively. With the help of this decomposition, which is valid for propagation in isotropic and anisotropic elastic media, we are able to derive, in a simple and didactic way, a unified expression for the quadratic normal moveout of a symmetric reflection in its most general form in 3D. The obtained expression allows for a direct interpretation of its various terms and fully encompasses the effects of velocity gradients and Earth surface topography.K e y w o r d s : quadratic traveltime, NMO, symmetric reflections

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Section: Non-cmp Moveoutsmentioning

confidence: 99%

Quadratic normal moveouts of symmetric reflections in elastic media: A quick tutorial

Tygel

Santos

2007

Stud Geophys Geod

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“…The Common Reflection Surface (CRS) stack is an efficient tool for stacking seismic data with low S/N ratio. With complex surface topography the paraxial near central ray travel-time is derived using the CRS stack operator based on ray theory (Muller, et al, 1998;Zhang, et al, 1998;Cruz, et al, 2000;Jaeger, et al, 2001) and is expressed by parameters having explicit physical meaning and called kinematic wave-field attributes.…”

Section: Introductionmentioning

confidence: 99%

Common reflection surface stack using dip decomposition for rugged surface topography

Sun

Teng

2007

Appl. Geophys.

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“…The parameter search is classified as a nonlinear ill-posed problem; therefore the strategy may need a starting point in the parameter space and derivatives, or a controlled random search without derivatives. Müller et al (1998) and Mann (2001a) describe strategies for the parameter search, basically performed in four steps. Mann (2001b) described the problem related to conflicting dips in the stack sections, analyzed the dependence of v NMO on β 0 , and proposed a solution to this problem by detecting multiple values β 0 for each contributing event by adapting the original search strategy of Müller et al (1998).…”

Section: Stack Operatormentioning

confidence: 99%

“…Müller et al (1998) and Mann (2001a) describe strategies for the parameter search, basically performed in four steps. Mann (2001b) described the problem related to conflicting dips in the stack sections, analyzed the dependence of v NMO on β 0 , and proposed a solution to this problem by detecting multiple values β 0 for each contributing event by adapting the original search strategy of Müller et al (1998). Soleimani et al (2009) addresses the conflicting dip problem by proposing a strategy that considers a multitude of different values of β 0 for each ZO sample, with the forward model (3) under the condition R N = R N IP , to improve the continuity of reflection events and diffraction events, in a process named common-diffraction-surface stack.…”

Section: Stack Operatormentioning

confidence: 99%

“…Under such circumstances, where simple model assumptions may fail, it is of particular importance to extract as much information as possible directly from the measured data. The Common Reflection Surface (CRS) stack, described by Müller et al (1998) and Mann (2002), among others, has become a powerful data-driven method for improving the zero-offset (ZO) simulation of seismic data. Topography can be directly considered during the stack process which was irrelevant for the presented marine case.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CRS-based Seismic Imaging in Complex Marine Geology

Leite¹,

Lima²,

Heilmann³

et al. 2010

72nd EAGE Conference and Exhibition Incorporating SPE EUROPEC 2010

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This paper presents results of a consistent workflow for processing and imaging applied to marine seismic data. The data set was collected in the Southern Atlantic offshore Brazil. Searching for techniques to increase the data resolution, fundamental steps of signal processing together with imaging methods based on the data-driven CRS technology, such as CRS-stack based residual static correction and pre-stack data enhancement, were applied and proved to be successful. The final aim of the data processing and imaging sequence was to obtain sections ready to be submitted to geological interpretation. The latter was conducted on the final stacked and CRS time migrated sections. The obtained image panels allow for interpreting discontinuities, thinning, faults, anticlines, plays of horsts and grabens. Some selected parts of the line needed detail processing to make structures more evident that where partly hidden by the strong free surface multiples and diffractions.

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Common reflection surface stacking method — Imaging with an unknown velocity model

Cited by 54 publications

References 1 publication

Quadratic normal moveouts of symmetric reflections in elastic media: A quick tutorial

Quadratic normal moveouts of symmetric reflections in elastic media: A quick tutorial

Common reflection surface stack using dip decomposition for rugged surface topography

CRS-based Seismic Imaging in Complex Marine Geology

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