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  | isbn    = 0-89181-602-X
 
  | isbn    = 0-89181-602-X
 
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==Definition and purpose==
  −
   
Seismic facies are mappable, three dimensional seismic units composed of groups of reflections whose parameters differ from those of adjacent facies units”.<ref name=ch21r31>Mitchum, R., M., Vail, P., R., Sangree, J., B., 1977, Seismic stratigraphy and global changes in sea level, part 6: stratigraphic interpretations of seismic reflection patterns in depositional sequences, in Payton, C., E., ed., Seismic Stratigraphy and [[Applications]] to Hydrocarbon Exploration: AAPG Memoir 26, p. 117–133.</ref> Seismic facies analysis is the description and interpretation of seismic reflection parameters, such as configuration, continuity, amplitude, and frequency, within the stratigraphic framework of a depositional sequence. Its purpose is to determine all variations of seismic parameters within [[third-order sequences]] and their systems tracts in order to determine lateral lithofacies and fluid type changes.<ref name=ch21r44>Vail, P., R., 1987, Seismic stratigraphy interpretation procedure, in Bally, A., W., ed., Atlas of Seismic Stratigraphy: AAPG Studies in Geology No. 27, p. 2.</ref>
 
Seismic facies are mappable, three dimensional seismic units composed of groups of reflections whose parameters differ from those of adjacent facies units”.<ref name=ch21r31>Mitchum, R., M., Vail, P., R., Sangree, J., B., 1977, Seismic stratigraphy and global changes in sea level, part 6: stratigraphic interpretations of seismic reflection patterns in depositional sequences, in Payton, C., E., ed., Seismic Stratigraphy and [[Applications]] to Hydrocarbon Exploration: AAPG Memoir 26, p. 117–133.</ref> Seismic facies analysis is the description and interpretation of seismic reflection parameters, such as configuration, continuity, amplitude, and frequency, within the stratigraphic framework of a depositional sequence. Its purpose is to determine all variations of seismic parameters within [[third-order sequences]] and their systems tracts in order to determine lateral lithofacies and fluid type changes.<ref name=ch21r44>Vail, P., R., 1987, Seismic stratigraphy interpretation procedure, in Bally, A., W., ed., Atlas of Seismic Stratigraphy: AAPG Studies in Geology No. 27, p. 2.</ref>
    
==Reflection parameters==
 
==Reflection parameters==
 
There are five useful reflection parameters:
 
There are five useful reflection parameters:
   
* Configuration (reflection geometry)
 
* Configuration (reflection geometry)
 
* Continuity
 
* Continuity
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|-
 
|-
 
| Configuration
 
| Configuration
| *  Bedding patterns *  Depositional properties *  Erosion and paleotopography *  [[Fluid contacts]]
+
|
 
+
*  Bedding patterns  
 +
*  Depositional properties  
 +
*  Erosion and paleotopography  
 +
*  [[Fluid contacts]]
 
|-
 
|-
 
| Continuity
 
| Continuity
| *  Lateral continuity of strata *  Depositional processes
+
|
 
+
*  Lateral continuity of strata  
 +
*  Depositional processes
 
|-
 
|-
 
| Amplitude
 
| Amplitude
| *  Velocity-density contrasts of individual interfaces *  Bed spacing *  Bed thickness
+
|
 
+
*  Velocity-density contrasts of individual interfaces  
 +
*  Bed spacing  
 +
*  Bed thickness
 
|-
 
|-
 
| Frequency
 
| Frequency
| *  Bed thickness *  Fluid content
+
|
 
+
*  Bed thickness  
 +
*  Fluid content
 
|-
 
|-
 
| Interval velocity
 
| Interval velocity
| *  Lithofacies estimations *  [[Porosity]] estimations *  Fluid content
+
|
 
+
*  Lithofacies estimations  
 +
*  [[Porosity]] estimations  
 +
*  Fluid content
 
|}
 
|}
  

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