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  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

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Overburden rock is the total stratigraphic section above the [[source rock]].<ref name=ch04r61>Magoon, L. B., and W. G. Dow, 1994, The Petroleum System--From Source to Trap: [http://store.aapg.org/detail.aspx?id=1022 AAPG Memoir 60], p. 3–24.</ref> The thickness and age of overburden rock provides a history of the rate of burial of a [[source rock]] toward and through the increasing temperature domains of the basin. This includes the range of temperatures necessary for cracking kerogens into hydrocarbons. (See also [[Kerogen type and hydrocarbon generation]].)

Overburden rock is the total stratigraphic section above the [[source rock]].<ref name=ch04r61>Magoon, L. B., and W. G. Dow, 1994, The Petroleum System--From Source to Trap: [http://store.aapg.org/detail.aspx?id=1022 AAPG Memoir 60], p. 3–24.</ref> The thickness and age of overburden rock provides a history of the rate of burial of a [[source rock]] toward and through the increasing temperature domains of the basin. This includes the range of temperatures necessary for [[cracking]] kerogens into hydrocarbons. (See also [[Kerogen type and hydrocarbon generation]].)

Because the depth to the probable [[source rocks]] of the East Breaks 160-161 field hydrocarbons is unknown, multiple working hypotheses must be considered. Four intervals of identified source rock are reported by Gross et al.<ref name=ch04r40>Gross, O. P., K. C. Hood, L. M. Wenger, and S. C. Harrison, 1995, Seismic imaging and analysis of source and migration within an integrated hydrocarbon system study, northern Gulf of Mexico basin: Abstracts, 1st Latin American Geophysical conference, p. 1–4.</ref> ([[:File:Sedimentary-basin-analysis_fig4-5.png|Figure 1]]) and are plotted on [[:File:Sedimentary-basin-analysis_fig4-45.png|Figure 2]]. Also plotted is the speculated middle Miocene source rock of Dow et al.<ref name=ch04r29>Dow, W. G., M. A. Yukler, J. T. Senftle, M. C. Kennicutt, and J. M. Armentrout, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research conference, p. 139–150.</ref> Gross et al.<ref name=ch04r40 /> consider the petroleum of the East Breaks area to have been sourced by [[Jurassic]] marine mudstones for the oil and [[Paleogene]] marine mudstones for the gas. Alternatively, Dow et al.<ref name=ch04r29 /> suggest middle [[Miocene]] marine mudstones as the probable source rock, although Taylor and Armentrout<ref name=ch04r93>Taylor, G. S., and J. M. Armentrout, 1990, Rock geochemistry and relationships to produced oils from upper Pliocene turbidites, High Island area, Gulf of Mexico: Proceedings, Gulf Coast Section SEPM 9th Annual Research conference, p. 151–161.</ref> believe the source rock facies to be older than the Miocene slope mudstones.

Because the depth to the probable [[source rocks]] of the East Breaks 160-161 field hydrocarbons is unknown, multiple working hypotheses must be considered. Four intervals of identified source rock are reported by Gross et al.<ref name=ch04r40>Gross, O. P., K. C. Hood, L. M. Wenger, and S. C. Harrison, 1995, Seismic imaging and analysis of source and migration within an integrated hydrocarbon system study, northern Gulf of Mexico basin: Abstracts, 1st Latin American Geophysical conference, p. 1–4.</ref> ([[:File:Sedimentary-basin-analysis_fig4-5.png|Figure 1]]) and are plotted on [[:File:Sedimentary-basin-analysis_fig4-45.png|Figure 2]]. Also plotted is the speculated middle Miocene source rock of Dow et al.<ref name=ch04r29>Dow, W. G., M. A. Yukler, J. T. Senftle, M. C. Kennicutt, and J. M. Armentrout, 1990, Miocene oil source beds in the East Breaks basin, Flex-Trend, offshore Texas: Proceedings, Gulf Coast Section SEPM 9th Annual Research conference, p. 139–150.</ref> Gross et al.<ref name=ch04r40 /> consider the petroleum of the East Breaks area to have been sourced by [[Jurassic]] marine mudstones for the oil and [[Paleogene]] marine mudstones for the gas. Alternatively, Dow et al.<ref name=ch04r29 /> suggest middle [[Miocene]] marine mudstones as the probable source rock, although Taylor and Armentrout<ref name=ch04r93>Taylor, G. S., and J. M. Armentrout, 1990, Rock geochemistry and relationships to produced oils from upper Pliocene turbidites, High Island area, Gulf of Mexico: Proceedings, Gulf Coast Section SEPM 9th Annual Research conference, p. 151–161.</ref> believe the source rock facies to be older than the Miocene slope mudstones.

==Rate of accumulation==

==Rate of accumulation==

<gallery mode=packed heights=300px widths=300px>

<gallery mode=packed heights=300px widths=300px>

File:Sedimentary-basin-analysis_fig4-32.png|{{figure number|3}}Rock thickness vs. time plot for nine key wells south of east- ern Louisiana within the area of the 6–4 Ma depocenter. After Piggott and Pulham;<ref name=PP>Piggott, N., and A. Pulham, 1993, Sedimentation rate as the control on hydrocarbon sourcing, generation, and migration in the deepwater Gulf of Mexico: Proceedings, Gulf Coast Section SEPM 14th Annual Research Conference, p. 179–191.</ref> courtesy Gulf Coast SEPM

File:Sedimentary-basin-analysis_fig4-32.png|{{figure number|3}}Rock thickness vs. time plot for nine key wells south of east- ern Louisiana within the area of the 6–4 Ma [[depocenter]]. After Piggott and Pulham;<ref name=PP>Piggott, N., and A. Pulham, 1993, Sedimentation rate as the control on hydrocarbon sourcing, generation, and migration in the deepwater Gulf of Mexico: Proceedings, Gulf Coast Section SEPM 14th Annual Research Conference, p. 179–191.</ref> courtesy Gulf Coast SEPM

File:Sedimentary-basin-analysis_fig4-33.png|{{figure number|4}}Rock accumulation rates for the Green Canyon 166 No. 1 well, as a histogram (lower graph) and as a set of burial history curves (upper graph). After Piggott and Pulham;<ref name=PP /> courtesy Gulf Coast SEPM.

File:Sedimentary-basin-analysis_fig4-33.png|{{figure number|4}}Rock accumulation rates for the Green Canyon 166 No. 1 well, as a histogram (lower graph) and as a set of burial history curves (upper graph). After Piggott and Pulham;<ref name=PP /> courtesy Gulf Coast SEPM.

</gallery>

</gallery>

==Amount==

==Amount==

[[File:Sedimentary-basin-analysis_fig4-43.png|thumb|300px|{{figure number|5}}North–south seismic section through the East Breaks 160-161 intraslope minibasin, showing the location of the East Breaks 160-161 field.]]

[[File:Sedimentary-basin-analysis_fig4-43.png|thumb|300px|{{figure number|5}}North–south seismic section through the East Breaks 160-161 intraslope [[minibasin]], showing the location of the East Breaks 160-161 field.]]

Drilling has documented that the East Breaks depocenter in the vicinity of the 160-161 field contains at least [[depth::15,000 ft]] (5000 m) of upper [[Miocene]] to [[Holocene]] sediment ([[:File:Sedimentary-basin-analysis_fig4-43.png|Figure 5]]). Dow et al.<ref name=ch04r29 /> use this thickness in calculating [[maturation]] and generation models. The thickness of overburden rock for any one of the older potential [[source rock]] intervals will be greater than [[depth::15,000 ft]] (5000 m), but the exact amount is highly speculative.

Drilling has documented that the East Breaks [[depocenter]] in the vicinity of the 160-161 field contains at least [[depth::15,000 ft]] (5000 m) of upper [[Miocene]] to [[Holocene]] sediment ([[:File:Sedimentary-basin-analysis_fig4-43.png|Figure 5]]). Dow et al.<ref name=ch04r29 /> use this thickness in calculating [[maturation]] and generation models. The thickness of overburden rock for any one of the older potential [[source rock]] intervals will be greater than [[depth::15,000 ft]] (5000 m), but the exact amount is highly speculative.

==See also==

==See also==

[[Category:Sedimentary basin analysis]]

[[Category:Sedimentary basin analysis]]

[[Category:East Breaks]]

[[Category:East Breaks]]