Difference between revisions of "Sequence stratigraphy: hierarchy of sequences"
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| part = Predicting the occurrence of oil and gas traps | | part = Predicting the occurrence of oil and gas traps | ||
| chapter = Exploring for stratigraphic traps | | chapter = Exploring for stratigraphic traps | ||
− | | frompg = 21- | + | | frompg = 21-14 |
− | | topg = 21- | + | | topg = 21-14 |
| 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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| isbn = 0-89181-602-X | | isbn = 0-89181-602-X | ||
}} | }} | ||
− | Global sea level changes (eustacy) are cyclic phenomena. Six orders of sea level | + | Global sea level changes ([[eustacy]]) are cyclic phenomena. Six orders of [[Sea level cycle phase|sea level cycle]]s are recognized from [[Stratigraphy|stratigraphic]] evidence.<ref name=ch21r47>Van Wagoner, J. C., Mitchum, R. M., Campion, K. M., Rahmanian, V. D., 1990, Siliciclastic Sequence stratigraphy in Well Logs, Cores and Outcrops: Concepts for High-Resolution Correlation of Time and Facies: [http://store.aapg.org/detail.aspx?id=1196 AAPG Methods in Exploration Series No. 7], 55 p.</ref> Third-, fourth-, and fifth-order sea level cycles model sequence deposition for petroleum exploration. A third-order sequence is a composite of fourth- and fifth-order sequences. |
The table below shows sea level cycle frequencies, thickness ranges, and stratigraphic names for third-, fourth-, and fifth-order sequences. | The table below shows sea level cycle frequencies, thickness ranges, and stratigraphic names for third-, fourth-, and fifth-order sequences. | ||
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{| class = "wikitable" | {| class = "wikitable" | ||
|- | |- | ||
− | ! Sequence order | + | ! Sequence order || Cycle frequency, m.y. || Thickness, m || Stratigraphic name |
− | |||
− | |||
− | |||
|- | |- | ||
− | | Third | + | | Third || 0.5–5 || 100–1000 || Sequence |
− | | 0.5–5 | ||
− | | 100–1000 | ||
− | | Sequence | ||
|- | |- | ||
− | | Fourth | + | | Fourth || 0.1–0.5 || 1–10 || Parasequence |
− | | 0.1–0.5 | ||
− | | 1–10 | ||
− | | Parasequence | ||
|- | |- | ||
− | | Fifth | + | | Fifth || 0.01–0.1 || 1–10 || Parasequence |
− | | 0.01–0.1 | ||
− | | 1–10 | ||
− | | Parasequence | ||
|} | |} | ||
==Superimposition of cycles== | ==Superimposition of cycles== | ||
− | [[file:exploring-for-stratigraphic-traps_fig21-7.png|thumb|{{figure number|1}}Composite curve created by adding third-, fourth-, and fifth-order cycles together.]] | + | [[file:exploring-for-stratigraphic-traps_fig21-7.png|300px|thumb|{{figure number|1}}Composite curve created by adding third-, fourth-, and fifth-order cycles together. From Van Wagoner et al.;<ref name=ch21r47 /> courtesy AAPG.]] |
Several frequencies, representing different orders of sea level cycles, are superimposed on one another to make a composite sea level cycle curve. For stratigraphic trap exploration, cycles that impact trap location are usually third-, fourth-, and fifth-order sea level cycles. [[:file:exploring-for-stratigraphic-traps_fig21-7.png|Figure 1]] shows how adding third-, fourth-, and fifth-order cycles together will produce a composite curve. | Several frequencies, representing different orders of sea level cycles, are superimposed on one another to make a composite sea level cycle curve. For stratigraphic trap exploration, cycles that impact trap location are usually third-, fourth-, and fifth-order sea level cycles. [[:file:exploring-for-stratigraphic-traps_fig21-7.png|Figure 1]] shows how adding third-, fourth-, and fifth-order cycles together will produce a composite curve. | ||
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==See also== | ==See also== | ||
* [[Sequence stratigraphy]] | * [[Sequence stratigraphy]] | ||
− | |||
* [[Third-order sequences]] | * [[Third-order sequences]] | ||
* [[Fourth- and fifth-order sequences (Parasequences)]] | * [[Fourth- and fifth-order sequences (Parasequences)]] | ||
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[[Category:Predicting the occurrence of oil and gas traps]] | [[Category:Predicting the occurrence of oil and gas traps]] | ||
[[Category:Exploring for stratigraphic traps]] | [[Category:Exploring for stratigraphic traps]] | ||
+ | [[Category:Treatise Handbook 3]] |
Latest revision as of 22:25, 3 February 2022
Exploring for Oil and Gas Traps | |
Series | Treatise in Petroleum Geology |
---|---|
Part | Predicting the occurrence of oil and gas traps |
Chapter | Exploring for stratigraphic traps |
Author | John C. Dolson, Mike S. Bahorich, Rick C. Tobin, Edward A. Beaumont, Louis J. Terlikoski, Michael L. Hendricks |
Link | Web page |
Store | AAPG Store |
Global sea level changes (eustacy) are cyclic phenomena. Six orders of sea level cycles are recognized from stratigraphic evidence.[1] Third-, fourth-, and fifth-order sea level cycles model sequence deposition for petroleum exploration. A third-order sequence is a composite of fourth- and fifth-order sequences.
The table below shows sea level cycle frequencies, thickness ranges, and stratigraphic names for third-, fourth-, and fifth-order sequences.
Sequence order | Cycle frequency, m.y. | Thickness, m | Stratigraphic name |
---|---|---|---|
Third | 0.5–5 | 100–1000 | Sequence |
Fourth | 0.1–0.5 | 1–10 | Parasequence |
Fifth | 0.01–0.1 | 1–10 | Parasequence |
Superimposition of cycles
Several frequencies, representing different orders of sea level cycles, are superimposed on one another to make a composite sea level cycle curve. For stratigraphic trap exploration, cycles that impact trap location are usually third-, fourth-, and fifth-order sea level cycles. Figure 1 shows how adding third-, fourth-, and fifth-order cycles together will produce a composite curve.
See also
- Sequence stratigraphy
- Third-order sequences
- Fourth- and fifth-order sequences (Parasequences)
- Traps in a framework of sequence stratigraphy
References
- ↑ 1.0 1.1 Van Wagoner, J. C., Mitchum, R. M., Campion, K. M., Rahmanian, V. D., 1990, Siliciclastic Sequence stratigraphy in Well Logs, Cores and Outcrops: Concepts for High-Resolution Correlation of Time and Facies: AAPG Methods in Exploration Series No. 7, 55 p.