Efficient and flexible seismic modeling of reservoirs: A hybrid approach

Lecomte, Isabelle; Gjøystdal, H.; Drottning, Åsmund; Maaø, Frank A.; Johansen, Tor Arne; Bakke, Roger

doi:10.1190/1.1756831

Cited by 9 publications

(7 citation statements)

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“…Possible non‐linearity at the excitation box may be avoided, for example, in the case when the excitation signal duration is very short and thus the background wavefield is already zero at the time when a scattered wavefield of significantly enhanced amplitudes of non‐linear field travels through the excitation box. Lecomte (1996) and Lecomte et al (2004) describe a similar situation while avoiding the reflection of the scattered wavefield by their excitation box formulation.…”

Section: Discussionmentioning

confidence: 99%

“…Lecomte (1996), Gjøystdal et al (1998, 2002), Hokstad et al (1998) and Lecomte et al (2004) combined RT and FD (where RT is an asymptotic solution of the wave equation and 2‐D FD can be elastic or acoustic). The FD is computed for a buried structure model and the scattered wavefield is then propagated to the free surface.…”

Section: The Methodsmentioning

confidence: 99%

“…After that, not only the coupling line becomes permeable for the scattered wavefield (see ), but the wavefield above such a horizontal line would be only scattered (; ) by definition and therefore its propagation to the free surface via RT would also be possible for an arbitrarily long excitation signal. Hence the RT‐FD‐RT technique of Lecomte et al (2004) can be added to the group of methods describable by the Alterman & Karal (1968) principle.…”

Section: The Methodsmentioning

confidence: 99%

“…Recently, their method was extended to the 3-D FE-FE hybrid modelling as DRM (domain reduction method) by Bielak et al (2003), Yoshimura (2003), Yoshimura et al (2003), Yang et al (2003), Bielak (2005), Faccioli et al (2005), Stupazzini et al (2006) and Kontoe et al (2008a,b). Lecomte (1996), Gjøystdal et al (1998Gjøystdal et al ( , 2002, Hokstad et al (1998) and Lecomte et al (2004) combined RT and FD (where RT is an asymptotic solution of the wave equation and 2-D FD can be elastic or acoustic). The FD is computed for a buried structure model and the scattered wavefield is then propagated to the free surface.…”

Section: Implementations Of the Hybrid Approach In Literaturementioning

confidence: 99%

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The source-box wave propagation hybrid methods: general formulation and implementation

Oprsal

Matyska

Irikura

2009

Geophysical Journal International

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S U M M A R YOriginated by Alterman and Karal (AK) in 1968 as a domain-coupling technical algorithm, the generalized hybrid approach of wave injection is described by binding two subvolumes treated per partes by arbitrary wave-propagation methods. The generalized AK two-step procedure combines the source and path effects computed by one arbitrary method and local site effects computed by another (arbitrary) method using the first method's wavefield as input. The advantage of the approach arises from the fact that the connection between the methods keeps the formal wave-injection boundary perfectly permeable for the wavefield scattered by local structure and can be applied to a variety of hybrid formulations. This hybrid approach leads to more effective modelling of combined source, path and site effects (e.g. by multiple second-step computations with varying structure, using single first step input), thereby reducing computer memory and time requirements. The main innovation of the paper is the generalization of the boundary condition acting between two complementary subvolumes of AK hybrid wavepropagation methods.

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Section: Discussionmentioning

confidence: 99%

Section: The Methodsmentioning

confidence: 99%

Section: The Methodsmentioning

confidence: 99%

Section: Implementations Of the Hybrid Approach In Literaturementioning

confidence: 99%

See 2 more Smart Citations

The source-box wave propagation hybrid methods: general formulation and implementation

Oprsal

Matyska

Irikura

2009

Geophysical Journal International

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“…In exploration seismology, the FD method is used for reservoir modelling and survey planning (e.g. Lecomte et al 2004). Despite the growing computer capacities during the last decade 2-D FD simulations are widely used, as 3-D simulations are limited to long wavelengths compared to the model size.…”

Section: Introductionmentioning

confidence: 99%

Simulating three-dimensional seismograms in 2.5-dimensional structures by combining two-dimensional finite difference modelling and ray tracing

Miksat

Müller

Wenzel

2008

Geophysical Journal International

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S U M M A R YFinite difference (FD) simulation of elastic wave propagation is an important tool in geophysical research. As large-scale 3-D simulations are only feasible on supercomputers or clusters, and even then the simulations are limited to long periods compared to the model size, 2-D FD simulations are widespread. Whereas in generally 3-D heterogeneous structures it is not possible to infer the correct amplitude and waveform from 2-D simulations, in 2.5-D heterogeneous structures some inferences are possible. In particular, Vidale & Helmberger developed an approach that simulates 3-D waveforms using 2-D FD experiments only. However, their method requires a special FD source implementation technique that is based on a source definition which is not any longer used in nowadays FD codes. In this paper, we derive a conversion between 2-D and 3-D Green tensors that allows us to simulate 3-D displacement seismograms using 2-D FD simulations and the actual ray path determined in the geometrical optic limit. We give the conversion for a source of a certain seismic moment that is implemented by incrementing the components of the stress tensor.Therefore, we present a hybrid modelling procedure involving 2-D FD and kinematic raytracing techniques. The applicability is demonstrated by numerical experiments of elastic wave propagation for models of different complexity.

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The Finite-Difference Time-Domain Method for Modeling of Seismic Wave Propagation

Moczo

Robertsson

Eisner

2007

Advances in Geophysics

277

155

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Efficient and flexible seismic modeling of reservoirs: A hybrid approach

Cited by 9 publications

References 0 publications

The source-box wave propagation hybrid methods: general formulation and implementation

The source-box wave propagation hybrid methods: general formulation and implementation

Simulating three-dimensional seismograms in 2.5-dimensional structures by combining two-dimensional finite difference modelling and ray tracing

The Finite-Difference Time-Domain Method for Modeling of Seismic Wave Propagation

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