Changes

  | part    = Critical elements of the petroleum system

  | part    = Critical elements of the petroleum system

  | chapter = Sedimentary basin analysis

  | chapter = Sedimentary basin analysis

  | frompg  = 4-1

  | frompg  = 4-32

  | topg    = 4-123

  | 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

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

}}

}}

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.

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==

* [[Seismic data|Seismic record sections]]

* [[Seismic data|Seismic record sections]]

* [[Biostratigraphic histogram]]s

* [[Identifying depositional sequences from biostratigraphic data|Biostratigraphic histograms]]

* [[Basic open hole tools|Wireline logs]]

* [[Basic open hole tools|Wireline logs]]

* Detailed measured stratigraphic sections

* Detailed measured stratigraphic sections

==Procedure==

==Procedure==

Use the table below to identify depositional sequences.

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.

| 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.

==See also==

==See also==

 

* [[Definitions of depositional system elements]]

* [[Definitions of depositional system elements]]

* [[Identifying depositional sequences in seismic sections]]

* [[Identifying depositional sequences in seismic sections]]

[[Category:Critical elements of the petroleum system]]  

[[Category:Critical elements of the petroleum system]]  

[[Category:Sedimentary basin analysis]]

[[Category:Sedimentary basin analysis]]