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muting analysis

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Series: Society of Exploration Geophysicists Geophysical References Series
Published: 01 January 1989
EISBN: 9781560802662
... equalization, two-dimensional filtering, and continuous mute analysis sweep. These methods achieved excellent results. Reflections from both deep and shallow formations are clear and the signal-to-noise ratio of the reflection profile is enhanced. More than one thousand line-kilometers of seismic data were...
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The 10 Hz spectral sections after (a) coarse velocity analysis and wide stretch mute, (b) fine velocity analysis and a narrow stretch mute. The 30 Hz spectral sections after (c) coarse velocity analysis and a wide stretch mute, and (d) fine velocity analysis and a narrow stretch mute.
Published: 26 November 2018
Figure 17. The 10 Hz spectral sections after (a) coarse velocity analysis and wide stretch mute, (b) fine velocity analysis and a narrow stretch mute. The 30 Hz spectral sections after (c) coarse velocity analysis and a wide stretch mute, and (d) fine velocity analysis and a narrow stretch mute.
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(a) CSG aligned with the positions of cable A before muting the Schölte waves, (b) CSG aligned with the positions of cable B before muting the Schölte waves, (c) CSG aligned with the positions of cable A after muting the Schölte waves, and (d) CSG aligned with the positions of cable B after muting the Schölte waves. We reproduce the data anatomy analysis presented in Operto et al. (2015). The red, white, and black arrows point to the reflection from a shallow reflector, the top of the low-velocity anomaly, and the top of the reservoir, respectively. The solid arrow points to the precritical reflections, whereas the dashed ones points to the postcritical reflections.
Published: 27 December 2023
after muting the Schölte waves. We reproduce the data anatomy analysis presented in Operto et al. (2015) . The red, white, and black arrows point to the reflection from a shallow reflector, the top of the low-velocity anomaly, and the top of the reservoir, respectively. The solid arrow points
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Example offset gathers illustrating the impact of the chosen mute on the resolution of residual moveout analysis. Muting to a sufficiently small angle/offset range to limit impact of anisotropy on isotropic velocity analysis results in noticeable limitations in resolution of RMO analysis. In this example, both gathers have been migrated using an anisotropic velocity model and, hence, the resulting gathers show only second-order residual moveout.
Published: 01 September 2009
Figure 4. Example offset gathers illustrating the impact of the chosen mute on the resolution of residual moveout analysis. Muting to a sufficiently small angle/offset range to limit impact of anisotropy on isotropic velocity analysis results in noticeable limitations in resolution of RMO
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Example of event picking in a prestack gather (preproduction). We mute above and below the marked lines prior to time-shift analysis. After muting, traveltimes are picked for interpolated maximum amplitudes.
Published: 21 September 2006
Figure 5. Example of event picking in a prestack gather (preproduction). We mute above and below the marked lines prior to time-shift analysis. After muting, traveltimes are picked for interpolated maximum amplitudes.
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NMO mute. (a) Velocity analysis with applied NMO for synthetic data as in Figure 8a for model G1. NMO muting of 30%, 50%, and 100% and offset ranges for P-Cable 3D and C1. (b) Offset distribution per square kilometer for P-Cable 3D and C1. Muting offsets are calculated using equation 9 for model 2. (c) Cumulative curves of C1 trace density for near offsets in relation to trace density of HR14 and HR16 for (b).
Published: 01 November 2018
Figure 9. NMO mute. (a) Velocity analysis with applied NMO for synthetic data as in Figure 8a for model G1. NMO muting of 30%, 50%, and 100% and offset ranges for P-Cable 3D and C1. (b) Offset distribution per square kilometer for P-Cable 3D and C1. Muting offsets are calculated using equation
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Correction-velocity comparison and wavefield separation with complex BASW analysis of the 3 m deep test tunnel with a 21.9 m SO and a unidirectional roll. From top to bottom: (a) fundamental correction velocity with full-wavefield standard analysis comparable with Figure 12a, (b) HM correction with full wavefield, and (c) HM correction with fundamental mute. A fundamental mute destroys the high-amplitude tunnel signature, as previously discussed with the other BASW techniques.
Published: 06 June 2016
Figure 13. Correction-velocity comparison and wavefield separation with complex BASW analysis of the 3 m deep test tunnel with a 21.9 m SO and a unidirectional roll. From top to bottom: (a) fundamental correction velocity with full-wavefield standard analysis comparable with Figure  12a , (b) HM
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Example of event picking in a prestack gather from the Valhall field baseline (1992) at position 0.93 km. We mute above and below the top reservoir horizon (marked with solid lines) prior to time-shift analysis. After muting, traveltimes are picked for interpolated maximum amplitudes.
Published: 21 September 2006
Figure 11. Example of event picking in a prestack gather from the Valhall field baseline (1992) at position 0.93 km. We mute above and below the top reservoir horizon (marked with solid lines) prior to time-shift analysis. After muting, traveltimes are picked for interpolated maximum amplitudes.
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Attenuating multiples using the Radon transform. (a) A CMP gather from a deep-water area. In the Radon domain (not shown) the primary and multiple reflections are localized within separate regions. Thus, they can be separated by muting the undesirable region. (b) The primary reflections recovered by an inverse Radon transform after the multiples were muted. (c) The multiple reflections recovered by an inverse Radon transform after the primaries were muted. (d) The multiples from (c) are subtracted from the original data (a). The result is multiple-free primary reflections (Yilmaz, Seismic Data Analysis).
Published: 01 January 2005
Figure 29. Attenuating multiples using the Radon transform. (a) A CMP gather from a deep-water area. In the Radon domain (not shown) the primary and multiple reflections are localized within separate regions. Thus, they can be separated by muting the undesirable region. (b) The primary
Journal Article
Published: 01 September 2005
Journal of Environmental and Engineering Geophysics (2005) 10 (3): 307–322.
... curve now spans over a wide frequency range (9–58 Hz). The purpose of this modeling analysis is to demonstrate that muting is capable of separating the different modes of the surface wave from multimode shot gathers without causing any unacceptable side effects by comparing the results with those...
FIGURES | View All (9)
Journal Article
Journal: Geophysics
Published: 11 August 2016
Geophysics (2016) 81 (5): V379–V385.
... this a polarity mute. Applying this polarity mute prior to traditional multichannel analysis of surface wave (MASW) analysis improves phase velocity estimation for fundamental and higher mode dispersion. This approach, in turn, should lead to improvement of S-wave velocity estimates with depth. With two simple...
FIGURES | View All (7)
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Frequency analyses of a set of raw shots to 2 s TWT selected from the area that covers the Main Uralian Fault zone in the three seismic profiles. (a) Shot gathers from the URSEIS, R114 and ESRU lines respectively. Muting lines are shown. Automatic Gain Control in a 2000 ms window has been applied for display purposes. (b) Spectral analysis of the shots in (a) shown to the same depth and over equivalent offsets (1400–2000 m). The spectral analysis of every shot is shown before and after filtering and before and after muting.
Published: 01 September 2000
been applied for display purposes. ( b ) Spectral analysis of the shots in (a) shown to the same depth and over equivalent offsets (1400–2000 m). The spectral analysis of every shot is shown before and after filtering and before and after muting.
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CMP stack of Jao line 3 data. (a) Brute stack using a preliminary 1D velocity profile for NMO corrections and a stretch mute of 50%. Note the multiple energy (M). (b) Stack with velocities determined from the final velocity analysis and hand-picked top mutes. (c) As for (b), but with residual-static corrections applied. Ellipses in (c) identify selected regions of improved coherency.
Published: 28 March 2014
Figure 10. CMP stack of Jao line 3 data. (a) Brute stack using a preliminary 1D velocity profile for NMO corrections and a stretch mute of 50%. Note the multiple energy (M). (b) Stack with velocities determined from the final velocity analysis and hand-picked top mutes. (c) As for (b
Journal Article
Journal: Geophysics
Published: 01 October 1996
Geophysics (1996) 61 (5): 1467–1482.
... is an increase in the amplitude of aliased events in the transform domain. In particular, the DRT will boost the amplitude of the aliases of true events that fall outside the p analysis window to help reconstruct the input data. These amplified aliases degrade signal periodicity in the (τ, ρ) domain. If muted...
Journal Article
Journal: Geophysics
Published: 01 October 1998
Geophysics (1998) 63 (5): 1618–1628.
...) or bandwidth measurements. The ensemble average of these stacked-trace measurements can then be examined while some aspect of the simulated acquisition or processing is adjusted. The result of this analysis is a plot illustrating the sensitivity of the seismic system (i.e., the stacked-trace quality...
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Two-dimensional data analysis. (a) Simple amplitude analysis using the first positive peak of the MOG collected between borehole RT1 and RT3. The color coding represents a binary subsurface of sand and clayey till assuming a cut-off amplitude value of 15,000 mV. The EM wave in the plot is assumed to travel the shortest direct path. The drill cuttings are included to enable comparison. (b and c) The starting models and the subsurface models after running the FWI algorithm 10 iterations. (b) The EM wave velocity images and (c) the electrical conductivity images. The dashed black lines mark the boundary of the muted zone around the boreholes. The FWI procedure does not alter the physical properties of the subsurface within the muted zone and therefore retains the properties of the starting model.
Published: 12 December 2017
Figure 2. Two-dimensional data analysis. (a) Simple amplitude analysis using the first positive peak of the MOG collected between borehole RT1 and RT3. The color coding represents a binary subsurface of sand and clayey till assuming a cut-off amplitude value of 15,000 mV. The EM wave in the plot
Journal Article
Journal: GSA Bulletin
Published: 01 March 2014
GSA Bulletin (2014) 126 (3-4): 569–584.
... analysis of log-transformed trace-element data suggests that the thicker loessite units exhibit a shift in provenance compared to paleosols and thinner loessite units. U-Pb ages of detrital zircons also differ between loessite and paleosols. Four couplets were analyzed; all loessite samples contain...
FIGURES | View All (11)
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A seismogram from uphole seismic survey that was used for attenuation analysis. Only the first arrivals remain after bottom muting.
Published: 01 June 2006
Figure 11 A seismogram from uphole seismic survey that was used for attenuation analysis. Only the first arrivals remain after bottom muting.
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Southwest–northeast line over a sand body (see the yellow polygon). Water depth: >1000  m, stratigraphy: Miocene; amplitude: bright; polarity: low-impedance trough (red over black cycle); resolution: 18 m; reservoir architectures: sand lobe; entrapment: stratistructural (wedge out); seal: lateral and top facies barrier; AVO response: positive (class-II sand); HC: gas; gather shown is full-offset NMO-corrected PSTM gather without any mute (the gather is flat up to a 30° incidence angle). AVO analysis has been applied with 30° mute.
Published: 19 August 2014
: stratistructural (wedge out); seal: lateral and top facies barrier; AVO response: positive (class-II sand); HC: gas; gather shown is full-offset NMO-corrected PSTM gather without any mute (the gather is flat up to a 30° incidence angle). AVO analysis has been applied with 30° mute.
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West–east line over a sand body (see the yellow polygon); water depth: >1000  m, stratigraphy: Pliocene; amplitude: bright; polarity: low-impedance trough (red over black cycle); resolution: 10 m; reservoir architectures: channelized lobe; sand content: poor; entrapment: structural closure; seal: top shale; AVO response: poor (class-III sand); HC: fizz gas (dry); gather shown is full-offset NMO-corrected PSTM gather without any mute (gather is flat up to a 30° incidence angle). AVO analysis has been applied with 30° mute.
Published: 19 August 2014
; entrapment: structural closure; seal: top shale; AVO response: poor (class-III sand); HC: fizz gas (dry); gather shown is full-offset NMO-corrected PSTM gather without any mute (gather is flat up to a 30° incidence angle). AVO analysis has been applied with 30° mute.