Difference between revisions of "Seismic facies analysis"
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| chapter = Exploring for stratigraphic traps | | chapter = Exploring for stratigraphic traps | ||
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| author = John C. Dolson, Mike S. Bahorich, Rick C. Tobin, Edward A. Beaumont, Louis J. Terlikoski, Michael L. Hendricks | | author = John C. Dolson, Mike S. Bahorich, Rick C. Tobin, Edward A. Beaumont, Louis J. Terlikoski, Michael L. Hendricks | ||
| link = http://archives.datapages.com/data/specpubs/beaumont/ch21/ch21.htm | | link = http://archives.datapages.com/data/specpubs/beaumont/ch21/ch21.htm | ||
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− | '''Seismic facies''' are "mappable, three dimensional seismic units composed of groups of [[Reflection configuration patterns|reflections]] whose parameters differ from those of adjacent facies units”.<ref name=ch21r31>Mitchum, R., M., Vail, P., R., Sangree, J., B., 1977, [http://archives.datapages.com/data/specpubs/seismic1/data/a165/a165/0001/0100/0117.htm 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: [http://store.aapg.org/detail.aspx?id=1157 AAPG Memoir 26], p. 117–133.</ref> Seismic facies analysis is the description and interpretation of seismic reflection parameters, such as configuration, continuity, [http://wiki.seg.org/wiki/Dictionary:Amplitude amplitude], and [http://wiki.seg.org/wiki/Dictionary:Frequency 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, [http://archives.datapages.com/data/specpubs/oversiz2/data/a188/a188/0001/0000/0001.htm Seismic stratigraphy interpretation procedure], in Bally, A., W., ed., Atlas of Seismic Stratigraphy: [http://store.aapg.org/detail.aspx?id=478 AAPG Studies in Geology No. 27], p. 2.</ref> Of these parameters, [[Reflection configuration patterns|reflection pattern]] geometries are perhaps the most useful for calibration with lithofacies interpreted from [[Quick-look lithology from logs|well logs]], [[Core description|cores]], and [[Mudlogging: drill cuttings analysis|cuttings]]. | + | '''Seismic facies''' are "mappable, three dimensional seismic units composed of groups of [[Reflection configuration patterns|reflections]] whose parameters differ from those of adjacent facies units”.<ref name=ch21r31>Mitchum, R., M., Vail, P., R., Sangree, J., B., 1977, [http://archives.datapages.com/data/specpubs/seismic1/data/a165/a165/0001/0100/0117.htm 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: [http://store.aapg.org/detail.aspx?id=1157 AAPG Memoir 26], p. 117–133.</ref> Seismic facies analysis is the description and interpretation of seismic reflection parameters, such as configuration, continuity, [http://wiki.seg.org/wiki/Dictionary:Amplitude amplitude], and [http://wiki.seg.org/wiki/Dictionary:Frequency 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, [http://archives.datapages.com/data/specpubs/oversiz2/data/a188/a188/0001/0000/0001.htm Seismic stratigraphy interpretation procedure], in Bally, A., W., ed., Atlas of Seismic Stratigraphy: [http://store.aapg.org/detail.aspx?id=478 AAPG Studies in Geology No. 27], p. 2.</ref> Of these parameters, [[Reflection configuration patterns|reflection pattern]] geometries are perhaps the most useful for calibration with lithofacies interpreted from [[Quick-look lithology from logs|well logs]], [[Core description|cores]], and [[Mudlogging: drill cuttings analysis|cuttings]]. |
[[file:AAPGBullFeb2013ZengFigure4.JPG|thumb|400px|Control of thickness tuning and frequency tuning on seismic facies. Amplitude and its instantaneous attribute models are calculated with 90° Ricker wavelets of 20-, 35-, and 80-Hz peak frequencies (or 26-, 45.5-, and 104-Hz predominant frequencies, respectively). No noise is added to the convolution models.<ref name=Zeng_2013>Zeng, Hongliu, 2013, Frequency-dependent seismic-stratigraphic and facies interpretation: AAPG Bulletin, v. 97, no. 2, p. 201–221, DOI:[http://archives.datapages.com/data/bulletns/2013/02feb/BLTN12029/BLTN12029.HTM 10.1306/06011212029].</ref>]] | [[file:AAPGBullFeb2013ZengFigure4.JPG|thumb|400px|Control of thickness tuning and frequency tuning on seismic facies. Amplitude and its instantaneous attribute models are calculated with 90° Ricker wavelets of 20-, 35-, and 80-Hz peak frequencies (or 26-, 45.5-, and 104-Hz predominant frequencies, respectively). No noise is added to the convolution models.<ref name=Zeng_2013>Zeng, Hongliu, 2013, Frequency-dependent seismic-stratigraphic and facies interpretation: AAPG Bulletin, v. 97, no. 2, p. 201–221, DOI:[http://archives.datapages.com/data/bulletns/2013/02feb/BLTN12029/BLTN12029.HTM 10.1306/06011212029].</ref>]] | ||
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[[Category:Exploring for stratigraphic traps]] | [[Category:Exploring for stratigraphic traps]] | ||
+ | [[Category:Treatise Handbook 3]] |
Latest revision as of 17:46, 4 February 2022
Seismic facies are "mappable, three dimensional seismic units composed of groups of reflections whose parameters differ from those of adjacent facies units”.[1] 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.[2] Of these parameters, reflection pattern geometries are perhaps the most useful for calibration with lithofacies interpreted from well logs, cores, and cuttings.
Reflection parameters
There are five useful reflection parameters:
- Configuration (reflection geometry)
- Continuity
- Amplitude
- Frequency
- Interval velocity
Depositional environment, sediment source, and lithofacies can be interpreted by grouping these parameters into mappable, three-dimensional seismic facies.[4] The table below[1] summarizes the information obtained from each parameter.
Reflection parameter | Geologic interpretation |
---|---|
Configuration |
|
Continuity |
|
Amplitude |
|
Frequency |
|
Interval velocity |
|
Seismic facies analysis procedure
The table below outlines a procedure to analyze seismic facies from a grid of sections (vertical) of 2-D or 3-D seismic data (modified from [1]).
- Divide each depositional sequence into seismic facies units on all seismic sections.
- Describe the internal reflection configuration and terminations of each seismic facies unit, i.e., sigmoid, parallel, downlap.
- Transfer seismic facies descriptions from seismic sections to a shot point map of each sequence.
- Combine seismic facies distribution and thickness with the map distribution of any other diagnostic parameters, such as interval velocity or localized amplitude anomalies.
- Integrate well and outcrop data with seismic facies distribution.
- Interpret the seismic facies maps in terms of depositional settings such as marine or nonmarine, water depth, basin position, energy, transport direction, or any other depositional aspects.
- Estimate lithology using depositional setting interpretation from step 6 and all available data.
See also
References
- ↑ 1.0 1.1 1.2 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.
- ↑ 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.
- ↑ Zeng, Hongliu, 2013, Frequency-dependent seismic-stratigraphic and facies interpretation: AAPG Bulletin, v. 97, no. 2, p. 201–221, DOI:10.1306/06011212029.
- ↑ Bally, A., W., ed., 1987, Atlas of Seismic Stratigraphy: AAPG Studies in Geology 27, vol. 1, 124 p.