Difference between revisions of "Depositional sequence identification"
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* [[Seismic data|Seismic record sections]] | * [[Seismic data|Seismic record sections]] | ||
* [[Biostratigraphic histogram]]s | * [[Biostratigraphic histogram]]s | ||
| − | * Wireline logs | + | * [[Basic open hole tools|Wireline logs]] |
* Detailed measured stratigraphic sections | * Detailed measured stratigraphic sections | ||
* Combinations of the above items | * Combinations of the above items | ||
Revision as of 20:22, 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 Biostratigraphic_correlation_and_age_determination#Changes_in_abundance_or_compositionabundance 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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