Changes

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

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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

|-

|-

| 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

|}

|}