Comparison of seismic diffraction imaging techniques: Plane wave destruction versus apex destruction

Decker, Luke; Klokov, Alexander; Fomel, Sergey

doi:10.1190/segam2013-1306.1

Cited by 16 publications

(9 citation statements)

References 10 publications

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“…A workflow that uses plane wave destruction for diffraction imaging is shown below. Flat-wave destruction of common shift data may have difficulty in extracting diffractions in regions with complex geological and velocity variations [11] (Figure 3).…”

Section: Diffraction Separation Methods From Seismic Full-wave Datamentioning

confidence: 99%

“…The acoustic (seismic) impedance, Z=, Where V is the seismic wave velocity and ρ is density. Although seismic migration is now the one of the primary imaging tools employed in the field, the earliest analogue seismic records took the form of simple single-fold illustration [4,[9][10][11][12]. These recordings were characterized by diffracted energy and random noise, but they nonetheless provided a useful interpretation of the subsoil of the Earth.…”

Section: Diffractionmentioning

confidence: 99%

See 1 more Smart Citation

Advance Wave Modeling and Diffractions for High-Resolution Subsurface Seismic Imaging

Bashir¹,

Ghosh²

2019

Applied Geophysics With Case Studies on Environmental, Exploration and Engineering Geophysics

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Seismic modeling and Imaging for the small-scale feature in a complex subsurface geology such as salt deposit, fracture reservoir, and Carbonate is not casual because of propagated wave affected by many objects once it hits the geologic structure in the subsurface. The principal goal of newly developed seismic modeling & imaging is to get a subsurface image of structural features with greatest sharpness or resolution. Using model dataset the Sigsbee and Marmousi, we illustrate the accuracy of conventional and advance wave modeling techniques. However, in conventional a Finite difference (FD) algorithm is used to generate the data and in advanced wave modeling, the low-rank (LR) approximation is used to acquire zerooffset configuration data. A field dataset from Malaysian basin is reprocessed and imaged using diffraction imaging which shows an enhancement in structural interpretation. Furthermore, the results gained from the proposed modeling and imaging approach significantly enhance the bandwidth of the imaged data. Finally, a frequency spectrum shows a recovery of low-frequency from 0 to 60 Hz which is an optimal resolution of seismic imaging.

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Section: Diffraction Separation Methods From Seismic Full-wave Datamentioning

confidence: 99%

Section: Diffractionmentioning

confidence: 99%

Advance Wave Modeling and Diffractions for High-Resolution Subsurface Seismic Imaging

Bashir¹,

Ghosh²

2019

Applied Geophysics With Case Studies on Environmental, Exploration and Engineering Geophysics

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“…A workflow which uses the plane wave destruction for diffraction imaging is shown below. Plane-wave destruction of common-offset data may face difficulties extracting diffractions in regions which have a complex geology and velocity variation [16]. Figure 5 shows the work flow employed in the preservation of diffraction by using plane-wave destruction filter.…”

Section: Diffraction Separation Methodsmentioning

confidence: 99%

Diffraction Enhancement Through Pre-Image Processing: Applications to Field Data, Sarawak Basin, East Malaysia

et al. 2018

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The future exploration plans of the industry is to find a small-scale reservoir for possible economic hydrocarbon reserves. These reserves could be illuminated by the super-resolution of full seismic data, including fractured zones, pinch-outs, channel edges, small-scale faults, reflector unconformities, salt flanks, karst, caves and fluid fronts, which are generally known as small scattering objects. However, an imaging approach that includes the diffraction event individually and images it constitutes a new approach for the industry; it is known as diffraction imaging. This paper documents results of a seismic processing procedure conducted to enhance diffractions in Sarawak Basin, using datasets from the Malaysian Basin to which no diffraction processing has been applied. We observed that the diffraction amplitude achieves maximum value when the detector is positioned vertically above the end point of the reflector, but drops off with increasing offset-distance from the point. Furthermore, the rate of attenuation of the diffracted wave energy is greater than that of the normal reflected wave energy in the same medium. In addition, the results indicate that the near offset and far angle stack data provide better diffraction events. In the other hand far offset and near angle stack provides the poor diffraction response. These results were revealed by angle-stacking of near-, mid-, and far-offsets data (4.5, 22.5 and 31.5 degrees) that was conducted to study amplitude and phase change of the diffraction curve. The final imaged data provides better faults definition in the carbonate field data.

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“…The importance of diffractions in high-resolution structural imaging has been emphasized in many recent publications (Khaidukov et al, 2004;Kozlov et al, 2004;Fomel et al, 2006;Landa et al, 2008;Moser and Howard, 2008;Moser, 2009;Klokov et al, 2010;Dell and Gajewski, 2011;Koren and Ravve, 2011;Klokov and Fomel, 2012;Decker et al, 2013;Popovici et al, 2014;Sturzu et al, 2014), and diffraction imaging is emerging as a new tool in seismic interpretation. By careful preprocessing, the inherent redundancy of prestack seismic data can be used to separate the contribution of high-energy specular events from those of low-amplitude events scattered by local unconformities and heterogeneities.…”

Section: Introductionmentioning

confidence: 99%

Diffraction imaging in fractured carbonates and unconventional shales

Sturzu

Popovici

Moser³

et al. 2015

Interpretation

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Diffraction imaging is recognized as a new approach to image small-scale fractures in shale and carbonate reservoirs. By identifying the areas with increased natural fracture density, reservoir engineers can design an optimal well placement program that targets the sweet spots (areas with increased production), and minimizes the total number of wells used for a prospective area. High-resolution imaging of the small-scale fractures in shale reservoirs such as Eagle Ford, Bakken, Utica, and Woodbine in the US, and Horn River, Montney, and Utica in Canada improves the prospect characterization and predrill assessment of the geologic conditions, improves the production and recovery efficiency, reduces field development cost, and decreases the environmental impact of developing the field by using fewer wells to optimally produce the reservoir. We evaluated several field data examples using a method of obtaining images of diffractors using specularity filtering that could be performed in depth and time migration. Provided that a good migration velocity was available, we used the deviation of ray scattering from Snell's law to attenuate reflection energy in the migrated image. The resulting diffraction images reveal much of the structural detail that was previously obscured by reflection energy.

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Comparison of seismic diffraction imaging techniques: Plane wave destruction versus apex destruction

Cited by 16 publications

References 10 publications

Advance Wave Modeling and Diffractions for High-Resolution Subsurface Seismic Imaging

Advance Wave Modeling and Diffractions for High-Resolution Subsurface Seismic Imaging

Diffraction Enhancement Through Pre-Image Processing: Applications to Field Data, Sarawak Basin, East Malaysia

Diffraction imaging in fractured carbonates and unconventional shales

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