Common Reflection Surface Stack Versus NMO/Stack and NMO/DMO Stack

Müller, Thilo

doi:10.3997/2214-4609.201408166

Cited by 40 publications

(20 citation statements)

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“…In order to search for the wave‐front attributes, Müller (1998) and Jäger et al (2001) proposed a three one‐parametric search strategy as shown in Fig. 8.…”

Section: Review Of the Crs Stack Methodsmentioning

confidence: 99%

“… Simplified flowchart of the pragmatic approach for the determination of the CRS attributes according to Müller (1998). …”

Section: Review Of the Crs Stack Methodsmentioning

confidence: 99%

“…In foldbelt areas conventional seismic methods such as normal moveout (NMO)/dip moveout (DMO) stacking often also give unsatisfactory imaging results. In order to improve the image quality of the key areas we used the zero‐offset common reflection surface (CRS) stack method (Müller 1998, 1999; Mann et al 1999; Perroud et al 1999; Jäger et al 2001; Menyoli et al 2002) which like multifocusing (Gelchinsky & Keydar 1999; Gelchinsky et al 1999; Landa et al 1999) belongs to the group of macro model‐independent imaging tools.…”

Section: Introductionmentioning

confidence: 99%

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Imaging of complex basin structures with the common reflection surface (CRS) stack method

Menyoli

Gajewski

Hübscher

2004

Geophysical Journal International

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S U M M A R YCommon reflection surface (CRS) stack technology is applied to seismic data from certain areas of the Donbas Foldbelt, Ukraine, after conventional seismic methods gave unsatisfactory results. On the conventionally processed post-stack migrated section the areas of interest already showed clear features of the basin structure, but reflector continuity and image quality were poor. It was our objective to improve the image quality in these areas to better support the geological interpretation and the model building.In contrast to the standard common mid-point (CMP) stack, in which a stacking trajectory is used, the CRS method transforms pre-processed multicoverage data into a zero-offset section by summing along stacking surfaces. The stacking operator is an approximation of the reflection response of a curved interface in an inhomogeneous medium. The primary advantage of the data-driven CRS stack method is its model independence and the enhancement of the signal-tonoise ratio of the stacked sections through a stacking reflection response along traces from more than one CMP gather. The presented results show that the multifold strength of the CRS stack is of particular advantage in the case of complex inverted features of Devonian-Carboniferous sediments in the Donbas Foldbelt data. We observe that in these areas where the confidence level for picking and interpretation of the stacking velocity model is low, imaging without a macrovelocity model gives improved results, because errors due to wrong or poor stacking velocity models are avoided.

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“…In order to search for the wave‐front attributes, Müller (1998) and Jäger et al (2001) proposed a three one‐parametric search strategy as shown in Fig. 8.…”

Section: Review Of the Crs Stack Methodsmentioning

confidence: 99%

“… Simplified flowchart of the pragmatic approach for the determination of the CRS attributes according to Müller (1998). …”

Section: Review Of the Crs Stack Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Imaging of complex basin structures with the common reflection surface (CRS) stack method

Menyoli

Gajewski

Hübscher

2004

Geophysical Journal International

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“…To be able to follow the pragmatic approach of Müller (1998), let me briefly review some theoretical aspects of the CRS stack: I consider the hyperbolic second order representation of the CRS stacking operator which can be derived by means of paraxial ray theory (Schleicher et al, 1993;Tygel et al, 1997).…”

Section: Pragmatic Search Strategymentioning

confidence: 99%

“…The CRS stack method (Müller, 1998(Müller, , 1999Mann et al, 1999;Jäger et al, 2001) simulates a ZO section by summing along stacking surfaces in the multi-coverage data. The stacking operator is an approximation of the kinematic reflection response of a curved interface in a laterally inhomogeneous medium.…”

Section: Introductionmentioning

confidence: 99%

Common‐reflection‐surface stack and conflicting dips

Mann

2000

SEG Technical Program Expanded Abstracts 2000

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The recently introduced common-reflection-surface (CRS) stack simulates a zero-offset (ZO) section from multi-coverage seismic reflection data for 2-D media in a data-driven way, i. e., without explicit knowledge of the macro-velocity model. The "best" stacking operators are determined by an optimization of the coherency along different test stacking operators in the multi-coverage data. Previous implementations determine only one optimum stacking operator for each ZO sample to be simulated. Consequently, conflicting dips are not taken into account but only the most prominent event contributes to a particular stack sample. This can lead to a lack of coherency of some events in the simulated ZO section. In this work, I show how this limitation can be overcome.The pragmatic search strategy of the original CRS stack implementation consists of three one-parametric search steps to determine the stacking operators. In the first step, an automatic CMP stack, conflicting dips can hardly be considered because the respective stacking velocities might be quite similar. However, I observe that conflicting dips can still be detected and separated in the subsequent search steps that are applied to the result of the automatic CMP stack.I propose an extension of the pragmatic approach to account for conflicting dips. For ZO samples where conflicting dips are detected, an additional one-parametric search is required. This provides a set of three kinematic wavefield attributes for each of the conflicting events. Stacking along the respective operator for each particular event allows to simulate their interference in the simulated ZO section by means of superposition.

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New seismic images of the Central Indian Suture Zone and their tectonic implications

2013

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[1] The Central Indian Suture (CIS), a mega shear zone, located in the central part of the Indian shield exhibits a complex structure with compositional heterogeneity. Multifold deep seismic reflection data acquired across the shear zone have been previously processed using the conventional common midpoint (CMP) method. In this study, we show results from imaging this shear zone using the common reflection surface (CRS) stack method, an alternative to the CMP stack. Our new images reveal geological features that are either poorly resolved or entirely absent in the earlier CMP stack section. Our major findings include a well-imaged Moho throughout the study area, existence of different crustal blocks each with distinct dipping reflection fabrics on the northern and southern sides of the CIS, a well-defined 8 km of Moho offset beneath the CIS, and a high-amplitude reflective zone representing the CIS. The Moho located at a depth of 48 km in the Bastar craton, to the south of the CIS, is also clearly resolved in our CRS stack, as well as in the time-migrated section. A deeply penetrating crustal-scale imbricated structure imaged up to a depth of 16.0 s two-way time (TWT), to the south of the CIS, suggests that the Bastar craton is subducting toward north. An oppositely dipping reflection fabric, a Moho offset, a positive-negative gravity anomaly pair, and the geological data indicate that the CIS represents a collision zone developed due to the interaction of the Bastar and Bundelkhand cratons with the evolution of the Sausar orogeny at~1000 Ma. This orogeny is contemporaneous with the Grenvillian orogeny and Rodinia assembly. Another thrust fault extending from 4 to 14 s TWT observed to the north of the CIS may represent the earlier, pre-Sausar orogenic activity at 1.6-1.5 Ga. The available seismic characteristics suggest that the CIS, the collisional suture, is also likely to represent a strike-slip fault.

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Common Reflection Surface Stack Versus NMO/Stack and NMO/DMO Stack

Cited by 40 publications

References 0 publications

Imaging of complex basin structures with the common reflection surface (CRS) stack method

Imaging of complex basin structures with the common reflection surface (CRS) stack method

Common‐reflection‐surface stack and conflicting dips

New seismic images of the Central Indian Suture Zone and their tectonic implications

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