Difference between revisions of "Depositional sequence identification"
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| − | A depositional sequence is bounded by 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 Bally, A., W., 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., Van Wagoner, J., C., 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 chronostratigraphically significant, consistently separating older strata from younger strata. | + | 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 Bally, A., W., 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., Van Wagoner, J., C., 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== | ||
To identify depositional sequences, we use the following: | To identify depositional sequences, we use the following: | ||
| − | * Seismic record sections | + | * [[Seismic data|Seismic record sections]] |
| − | * Biostratigraphic | + | * [[Biostratigraphic histogram]]s |
* Wireline logs | * Wireline logs | ||
* Detailed measured stratigraphic sections | * Detailed measured stratigraphic sections | ||
Revision as of 20:13, 17 July 2014
| 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 table below to identify depositional sequences.
| Step | Action |
|---|---|
| 1 | Identify depositional sequences in seismic reflection profiles, correlating sequence boundaries throughout a data grid of seismic reflection profiles. |
| 2 | Analyze biostratigraphic data for age-significant bioevents and abundance patterns that may suggest depositional sequences. |
| 3 | Analyze the depositional patterns from wireline logs, integrate the biostratigraphic data with correlated well log and seismic data, and select candidate depositional sequences. |
| 4 | Make regional stratigraphic sections by integrating seismic profile interpretations, biostratigraphic analyses, and regional well log cross sections. |
| 5 | Identify depositional sequences based on the fully integrated data set. |
See also
- Depositional sequence
- 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 Bally, A., W., ed., Atlas of Seismic Stratigraphy: AAPG Studies in Geology No. 1, p. 1–10.
- ↑ Mitchum, R., M., Jr., Van Wagoner, J., C., 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
| find literature about Depositional sequence identification |
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