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Depositional sequence identification (view source)
Revision as of 19:14, 30 January 2014
, 19:14, 30 January 2014Initial import
{{publication
| image = exploring-for-oil-and-gas-traps.png
| width = 120px
| series = Treatise in Petroleum Geology
| title = Exploring for Oil and Gas Traps
| part = Critical elements of the petroleum system
| chapter = Sedimentary basin analysis
| frompg = 4-1
| topg = 4-123
| author = John M. Armentrout
| link = http://archives.datapages.com/data/specpubs/beaumont/ch04/ch04.htm
| pdf =
| store = http://store.aapg.org/detail.aspx?id=545
| isbn = 0-89181-602-X
}}
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, Seismic stratigraphy interpretation procedure, in Bally, A., W., ed., Atlas of Seismic Stratigraphy: AAPG, 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.
==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.
{| class = "wikitable"
|-
! 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 sequences]]
* [[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==
{{reflist}}
==External links==
{{search}}
* [http://archives.datapages.com/data/specpubs/beaumont/ch04/ch04.htm Original content in Datapages]
* [http://store.aapg.org/detail.aspx?id=545 Find the book in the AAPG Store]
[[Category:Critical elements of the petroleum system]]
[[Category:Sedimentary basin analysis]]
| image = exploring-for-oil-and-gas-traps.png
| width = 120px
| series = Treatise in Petroleum Geology
| title = Exploring for Oil and Gas Traps
| part = Critical elements of the petroleum system
| chapter = Sedimentary basin analysis
| frompg = 4-1
| topg = 4-123
| author = John M. Armentrout
| link = http://archives.datapages.com/data/specpubs/beaumont/ch04/ch04.htm
| pdf =
| store = http://store.aapg.org/detail.aspx?id=545
| isbn = 0-89181-602-X
}}
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, Seismic stratigraphy interpretation procedure, in Bally, A., W., ed., Atlas of Seismic Stratigraphy: AAPG, 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.
==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.
{| class = "wikitable"
|-
! 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 sequences]]
* [[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==
{{reflist}}
==External links==
{{search}}
* [http://archives.datapages.com/data/specpubs/beaumont/ch04/ch04.htm Original content in Datapages]
* [http://store.aapg.org/detail.aspx?id=545 Find the book in the AAPG Store]
[[Category:Critical elements of the petroleum system]]
[[Category:Sedimentary basin analysis]]