Difference between revisions of "Dictionary:Trace envelope/es"

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{{#category_index:T|trace envelope}}
 
{{#category_index:T|trace envelope}}
  
The trace envelope is a [[Special:MyLanguage/Dictionary:Attribute,_seismic|seismic attribute]], also known as ''instantaneous amplitude,'' is a representation of the
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La traza envolvente es un  [[Special:MyLanguage/Dictionary:Attribute,_seismic/es|atributo sísmico]], también conocido como ''amplitud instantánea,'' es una representación de la amplitud <math> E(t) </math> de una función oscilatoria <math> f(t)  </math>. La cantidad <math> E(t) </math> es del mismo orden del valor absoluto de las amplitudes de la función. La amplitud instantánea varía aproximadamente entre 0 y el valor absoluto de la amplitud máxima de la traza.  
amplitude <math> E(t) </math> of an oscillatory function <math> f(t)  </math>.   The quantity <math> E(t) </math> is of the same order as the absolute value of the amplitudes of the function. Instantaneous amplitude varies approximately between 0 and the absolute value of the maximum amplitude of the trace.  
 
  
 
The envelope of seismic signals is independent of the phase and may be related directly to a variety of other [[Special:MyLanguage/Dictionary:Attribute,_seismic|trace attributes]]. The trace envelope of a seismic signal may represent the individual interface contrast or, the combined response of several interfaces, depending on the seismic bandwidth.<ref>Taner, Turhan (1992), Attributes Revisited, Rock Solid Images Houston, Texas (published 2000)</ref>
 
The envelope of seismic signals is independent of the phase and may be related directly to a variety of other [[Special:MyLanguage/Dictionary:Attribute,_seismic|trace attributes]]. The trace envelope of a seismic signal may represent the individual interface contrast or, the combined response of several interfaces, depending on the seismic bandwidth.<ref>Taner, Turhan (1992), Attributes Revisited, Rock Solid Images Houston, Texas (published 2000)</ref>

Revision as of 23:51, 19 August 2018

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La traza envolvente es un atributo sísmico, también conocido como amplitud instantánea, es una representación de la amplitud de una función oscilatoria . La cantidad es del mismo orden del valor absoluto de las amplitudes de la función. La amplitud instantánea varía aproximadamente entre 0 y el valor absoluto de la amplitud máxima de la traza.

The envelope of seismic signals is independent of the phase and may be related directly to a variety of other trace attributes. The trace envelope of a seismic signal may represent the individual interface contrast or, the combined response of several interfaces, depending on the seismic bandwidth.[1]

The instantaneous amplitude of a seismic trace is related to a form of the trace called the analytic trace, which is the representation of the original seismic trace as a complex-valued function . Thus the trace amplitude is given by the modulus at each time


.


Here, the real part of the analytic trace , is just the original seismic trace . The imaginary part , also called the quadrature trace, is computed by taking the Hilbert transform of .

The trace envelope is a physical attribute and can be used as an effective discriminator for the following characteristics:

  • Is proportional to the the acoustic impedance contrast, hence is related to reflectivity
  • Bright Spots
  • Possible gas accumulation
  • Sequence boundaries
  • Thin-bed tuning effects
  • Unconformities
  • Major changes in lithology
  • Major changes in depositional environment
  • Lateral changes indicating faulting
  • Spatial correlation to porosity and other lithologic variations.


References

  1. Taner, Turhan (1992), Attributes Revisited, Rock Solid Images Houston, Texas (published 2000)