Thin‐layer response and spectral bandwidth

Voogd, N. de; Rooijen, H. den

doi:10.1190/1.1441400

Cited by 43 publications

(16 citation statements)

References 3 publications

(2 reference statements)

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“…Widess 1973) where λ= TV P is the wavelength of the signal and d the thickness of the inclusion. A variation of this parameter can be obtained by a variation of the layer thickness as considered by de Voogd & den Roijen (1983) or by a variation of the wavelet period as we consider here. In conversion upon transmission, the characteristic wavelength λ in the inclusion depends on the dominant period T b of the wavelet and on both P and S layer velocities, by the relation λ= T b /(1/ V S – 1/ V P ) (when corrected for the incidence angle).…”

Section: Multiresolution Analysis Of the Low Velocity Zone Responsementioning

confidence: 99%

The oceanic nature of the African slab subducted under Peloponnesus: thin-layer resolution from multiscale analysis of teleseismic P-to-S converted waves

Gesret

Laigle²,

Díaz

et al. 2010

Geophysical Journal International

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Section: Multiresolution Analysis Of the Low Velocity Zone Responsementioning

confidence: 99%

The oceanic nature of the African slab subducted under Peloponnesus: thin-layer resolution from multiscale analysis of teleseismic P-to-S converted waves

Gesret

Laigle²,

Díaz

et al. 2010

Geophysical Journal International

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“…The long wavelengths and receiver spacing used in this study are probably insufficient to resolve separate reflections from the top and bottom of Unit IV. Layer resolution is a complex function of source spectrum, impedance, and layer thickness (Kallweit and Wood, 1982;de Voogd and den Rooijen, 1983). Experiments at resolving thin beds, however, suggest that with good signal-to-noise conditions beds of greater than about one-quarter wavelength can be resolved seismically (Widess, 1973;Waters, 1978).…”

Section: Seismic Stratigraphymentioning

confidence: 99%

Seismic Stratigraphy in a Transverse Ridge, Atlantis II Fracture Zone

Swift¹,

Hoskins²,

Stephen³

1991

Proceedings of the Ocean Drilling Program

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During Ocean Drilling Program Leg 118, we conducted a vertical seismic profile in Hole 735B, a 0.5-km-deep borehole in 720 m of water on the eastern wall of the Atlantis II Fracture Zone, Southwest Indian Ridge. Seismograms were collected at 20 borehole depths, alternately using a water gun and then an air gun at each depth. The overall velocity is 6.5 km/s. The lowest interval velocities occur in the foliated gabbros (lithologic Unit I) and olivine gabbro-troctolite (Unit VI). We separated up-and down-going wavefields with frequency-wave number filtering and deconvolved the up-going field by spectral division using the down-going field at each receiver depth. The processed sections show irregular reflections from the base of the foliated gabbros (Unit 1, 50-70 mbsf) and from the Fe-Ti rich gabbro (Unit IV, 225-250 mbsf). We tentatively interpret coherent events at ~560 and 760-825 mbsf as reflections from Moho raised tectonically to shallow depths within the transverse ridge.

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“…It is therefore evident that 4D (1982), De Voogd andDen Rooijen (1983), Robertson and glas would therefore have a larger amplitude and a different Nogami (1984), and others. Their studies were based on phase to the wavelet reflected from the rubber.…”

Section: Introductionmentioning

confidence: 95%

Modeling 4D Seismology

McDonald¹,

Tatalovic²

1986

Proceedings of SPE Enhanced Oil Recovery Symposium

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The main problem with applying the technique6 of 4DThe 3D (or areal) seismic technique has become more seismology to the real world is that the results can only be checked with the drill; a very expensive procedure. In adwidely used as an exploration tool in the oil industry. Origdition the resolving power of the surface seismic method in inally the technique was devised because it was recognized measuring the simplest stratigraphic traps is barely underthat geological features are, in the main, three-dimensional,The conventional planar CDP method could generate gen-stood. Therefore, the Seismic Acoustics Laboratory of the AGL at the University of Houston hss initiated a research eralized regional information but out-of-plane data are not program in which 4D seismology techniques are being modcorrectly imaged, eled physically. The aim is to provide the industry with It soon became apparent that the 3D method could some measure of the tool as an aid to enhanced oil recovery provide a means of mapping the areal extent of acoustic projects. discontinuities in the subsurface. In addition it was seen This paper will show some of the first measurements that if the areal seismic data could be tied to data from of the resolving power of the areal seismic method and how at least one well in the area in the form of a VSP, not the resolving power can be affected by the geometry of the only the area but the volume of the discontinuity could data collection and by the nature of the wave propagation be determined.It is therefore evident that 4D seismology (measurements in the x,y,z and t directions) can provide in the media surrounding the hydrocarbon accumulation.

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Thin‐layer response and spectral bandwidth

Cited by 43 publications

References 3 publications

The oceanic nature of the African slab subducted under Peloponnesus: thin-layer resolution from multiscale analysis of teleseismic P-to-S converted waves

The oceanic nature of the African slab subducted under Peloponnesus: thin-layer resolution from multiscale analysis of teleseismic P-to-S converted waves

Seismic Stratigraphy in a Transverse Ridge, Atlantis II Fracture Zone

Modeling 4D Seismology

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