Difference between revisions of "Depositional sequence identification"
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| part = Critical elements of the petroleum system | | part = Critical elements of the petroleum system | ||
| chapter = Sedimentary basin analysis | | chapter = Sedimentary basin analysis | ||
| − | | frompg = 4- | + | | frompg = 4-32 |
| − | | topg = 4- | + | | topg = 4-34 |
| author = John M. Armentrout | | author = John M. Armentrout | ||
| link = http://archives.datapages.com/data/specpubs/beaumont/ch04/ch04.htm | | link = http://archives.datapages.com/data/specpubs/beaumont/ch04/ch04.htm | ||
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| − | A | + | A depositional sequence is bounded by [[Unconformity|unconformities]] or the correlative conformity. It is subdivided by internal surfaces of [[transgression]] and [[maximum flooding]].<ref name=ch04r99>Vail, P. R., 1987, [http://archives.datapages.com/data/specpubs/oversiz2/data/a188/a188/0001/0000/0001.htm Seismic stratigraphy interpretation procedure], in A. W. Bally, ed., Atlas of Seismic Stratigraphy: [http://store.aapg.org/detail.aspx?id=478 AAPG Studies in Geology No. 1], p. 1–10.</ref><ref name=ch04r70>Mitchum, R. M., Jr., and J. C. Van Wagoner, 1990, High-frequency sequences and eustatic cycles in the Gulf of Mexico basin: Proceedings, Gulf Coast Section SEPM 11th Annual Research conference, p. 257–267.</ref> Each of these surfaces is [[Chronostratigraphy|chronostratigraphically]] significant, consistently separating older strata from younger strata. |
==Identifying data== | ==Identifying data== | ||
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==Procedure== | ==Procedure== | ||
| − | Use the | + | Use the procedure below to identify depositional sequences. |
| − | + | # Identify depositional sequences in [[Seismic data|seismic reflection profiles]], correlating sequence boundaries throughout a data grid of seismic reflection profiles. | |
| − | + | # Analyze biostratigraphic data for [[Biostratigraphy in sequence stratigraphy|age-significant bioevents]] and [[Biostratigraphic correlation and age determination#Changes in abundance or composition|abundance patterns]] that may suggest depositional sequences. | |
| − | + | # Analyze the depositional patterns from [[Basic open hole tools|wireline logs]], integrate the biostratigraphic data with correlated well log and [[seismic data]], and select candidate depositional sequences. | |
| − | + | # Make regional stratigraphic sections by integrating seismic profile interpretations, biostratigraphic analyses, and regional well log [[cross section]]s. | |
| − | + | # Identify depositional sequences based on the fully integrated data set. | |
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==See also== | ==See also== | ||
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* [[Definitions of depositional system elements]] | * [[Definitions of depositional system elements]] | ||
* [[Identifying depositional sequences in seismic sections]] | * [[Identifying depositional sequences in seismic sections]] | ||
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[[Category:Critical elements of the petroleum system]] | [[Category:Critical elements of the petroleum system]] | ||
[[Category:Sedimentary basin analysis]] | [[Category:Sedimentary basin analysis]] | ||
| + | [[Category:Treatise Handbook 3]] | ||
Latest revision as of 21:47, 22 February 2022
| Exploring for Oil and Gas Traps | |
| |
| Series | Treatise in Petroleum Geology |
|---|---|
| Part | Critical elements of the petroleum system |
| Chapter | Sedimentary basin analysis |
| Author | John M. Armentrout |
| Link | Web page |
| Store | AAPG Store |
A depositional sequence is bounded by unconformities or the correlative conformity. It is subdivided by internal surfaces of transgression and maximum flooding.[1][2] Each of these surfaces is chronostratigraphically significant, consistently separating older strata from younger strata.
Identifying data
To identify depositional sequences, we use the following:
- Seismic record sections
- Biostratigraphic histograms
- Wireline logs
- Detailed measured stratigraphic sections
- Combinations of the above items
Procedure
Use the procedure below to identify depositional sequences.
- Identify depositional sequences in seismic reflection profiles, correlating sequence boundaries throughout a data grid of seismic reflection profiles.
- Analyze biostratigraphic data for age-significant bioevents and abundance patterns that may suggest depositional sequences.
- Analyze the depositional patterns from wireline logs, integrate the biostratigraphic data with correlated well log and seismic data, and select candidate depositional sequences.
- Make regional stratigraphic sections by integrating seismic profile interpretations, biostratigraphic analyses, and regional well log cross sections.
- Identify depositional sequences based on the fully integrated data set.
See also
- Definitions of depositional system elements
- Identifying depositional sequences in seismic sections
- Identifying depositional sequences from biostratigraphic data
- Recognizing stacked depositional sequences in seismic profiles
- Recognizing stacked depositional sequences from well data
References
- ↑ Vail, P. R., 1987, Seismic stratigraphy interpretation procedure, in A. W. Bally, ed., Atlas of Seismic Stratigraphy: AAPG Studies in Geology No. 1, p. 1–10.
- ↑ Mitchum, R. M., Jr., and J. C. Van Wagoner, 1990, High-frequency sequences and eustatic cycles in the Gulf of Mexico basin: Proceedings, Gulf Coast Section SEPM 11th Annual Research conference, p. 257–267.
External links
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