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Line 21: − {| class = "wikitable"+ − |-+ − ! Step+ − ! Action+ − |-+ − | 1 − | Define the outline of the basin and important regional structural features. − |- − | 2 − | Map total sediment thickness. − |- − | 3 − | Identify subbasins (depocenters and minibasins). − |- − | 4 − | Map age and location of oil and gas fields. − |- − | 5 − | Map age and location of [[source rock]]s. − |} − + − + Line 52:
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added Category:Treatise Handbook 3 using HotCat
| 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 = 4-7
| topg = 4-123
| topg = 4-7
| 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
To define a basin, we follow the steps listed in the table below.
To define a basin, we follow the steps listed in the table below.
# Define the outline of the basin and important regional structural features.
# Map total sediment thickness.
# Identify subbasins ([[depocenter]]s and minibasins).
# Map age and location of oil and gas fields.
# Map age and location of [[source rock]]s.
==Basin outline and structural features==
==Basin outline and structural features==
The particular study area, whether only a part of a basin or an entire basin itself, should be identified on a large-scale geographic map using total sediment thickness as the primary control. We then map major regional structural features. If postdepositional deformation has resulted in erosion, we construct a paleogeographic restoration to approximate the original depositional basin outline (see [[Paleogeography]]).
The particular study area, whether only a part of a basin or an entire basin itself, should be identified on a large-scale geographic map using total sediment thickness as the primary control. We then map major regional structural features. If postdepositional [[deformation]] has resulted in [http://www.usgs.gov/science/science.php?term=353 erosion], we construct a paleogeographic restoration to approximate the original depositional basin outline (see [[Paleogeography]]).
==Basins, depocenters, and minibasins==
==Basins, depocenters, and minibasins==
The interaction of the eustatic cycles of sediment accumulation within geographically shifting regional depocenters results in a complex stratigraphic architecture later deformed by tectonic movement. This deformation results in the formation of subbasins, depocenters, and minibasins. Minibasins in the GOM basin are relatively small areas of sedimentary thicks bounded by faults and salt-cored highs. We subdivide the basin into depocenters by identifying age-specific sediment thicks. We then subdivide depocenters into minibasins by identifying areas within the depocenter isolated by structure.
The interaction of the [[Eustacy|eustatic cycles]] of sediment accumulation within geographically shifting regional [[depocenter]]s results in a complex stratigraphic architecture later deformed by tectonic movement. This deformation results in the formation of subbasins, depocenters, and minibasins. Minibasins in the GOM basin are relatively small areas of sedimentary thicks bounded by faults and salt-cored highs. We subdivide the basin into depocenters by identifying age-specific sediment thicks. We then subdivide depocenters into minibasins by identifying areas within the depocenter isolated by structure.
==Subbasin sediment thickness, location==
==Subbasin sediment thickness, location==
==Source age, location==
==Source age, location==
Hydrocarbon types reflect the composition of the kerogens from which they were generated and provide an estimate of the potential number of source-rock intervals or variations of kerogen facies within a source rock. We can prepare or locate a map showing the distribution of hydrocarbon types.
Hydrocarbon types reflect the composition of the [[kerogen]]s from which they were generated and provide an estimate of the potential number of source-rock intervals or variations of kerogen facies within a [[source rock]]. We can prepare or locate a map showing the distribution of [[hydrocarbon type]]s.
==See also==
==See also==
[[Category:Critical elements of the petroleum system]]
[[Category:Critical elements of the petroleum system]]
[[Category:Sedimentary basin analysis]]
[[Category:Sedimentary basin analysis]]
[[Category:Treatise Handbook 3]]