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:

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

References

  1. 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.
  2. 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

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