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East Breaks critical moment (view source)
Revision as of 17:07, 23 March 2022
, 17:07, 23 March 2022added Category:Treatise Handbook 3 using HotCat
| isbn = 0-89181-602-X
| isbn = 0-89181-602-X
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Magoon and Dow<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> define the critical moment as the time that best depicts the [[Petroleum generation|generation]]-[[migration]]-[[accumulation]] of most hydrocarbons in a [[petroleum system]]. The East Breaks 160-161 field began to accumulate no earlier than 1.2 Ma when the trap began forming, and accumulation is inferred to continue to the present<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> The structural configuration has changed little since initial formation, so that the present-day map (Figure 4-42) and [[Cross section|cross-sectional geometry]] (Figure 4-43) accurately depict the trapping aspects of the petroleum system.
Magoon and Dow<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> define the critical moment as the time that best depicts the [[Petroleum generation|generation]]-[[migration]]-[[accumulation]] of most hydrocarbons in a [[petroleum system]]. The East Breaks 160-161 field began to accumulate no earlier than 1.2 Ma when the trap began forming, and accumulation is inferred to continue to the present<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> The structural configuration has changed little since initial formation, so that the present-day map ([[:File:Sedimentary-basin-analysis_fig4-42.png|Figure 1]]) and [[Cross section|cross-sectional geometry]] ([[:File:Sedimentary-basin-analysis_fig4-43.png|Figure 2]]) accurately depict the trapping aspects of the petroleum system.
<gallery mode=packed heights=300px widths=300px>
Sedimentary-basin-analysis_fig4-42.png|{{figure number|1}}Map of structural elements that define the East Breaks 160-161 minibasin, which is bound on the north by fault A, on the east by faults B and C, and on the south by a salt-cored high. Copyright of: Armentrout et al.;<ref>Armentrout, J. M., S. J. Malacek, P. Braithwaite, and C. R. Beeman, 1991, Seismic facies of slope basin turbidite reservoirs, East Breaks 160-161 field: Pliocene–Pleistocene, northwest- ern Gulf of Mexico, in P. Weimer and M. J. Link, eds., Seismic Facies and Sedimentary Processes of Submarine Fans and Turbidite Systems: New York, Springer-Verlag, p. 223–239.</ref> courtesy Springer-Verlag.
File:Sedimentary-basin-analysis_fig4-43.png|{{figure number|2}}North–south seismic section through the East Breaks 160-161 intraslope minibasin, showing the location of the East Breaks 160-161 field.
</gallery>
==Possible critical moments==
==Possible critical moments==
According to the [[maturation]] model for a middle Miocene [[source rock]], peak oil generation would have begun 0.2 Ma<ref name=ch04r29 /> and the critical moment for the East Breaks 160-161 petroleum system would be 0.20 Ma (Figures 4-45 and 4-53). If a stratigraphically deeper lower Paleocene or upper Jurassic source rock is the origin of the East Breaks oils, an earlier onset of significant generation could have occurred with [[migration]], continuing to today and supplying the petroleum that has charged the field.
[[File:Sedimentary-basin-analysis_fig4-45.png|thumb|300px|{{figure number|3}}Time scale from Haq et al.;<ref>Haq, B., J. Hardenbol, and P. R. Vail, 1988, Mesozoic and Cenozoic chronostratigraphy and cycles of sea-level change: SEPM Special Publication 42, p. 71–108.</ref> DOW represents source rock, generation, and critical moment estimates.<ref name=ch04r29 />]]
[[File:Sedimentary-basin-analysis_fig4-53.png|thumb|300px|{{figure number|4}}1-D burial history/maturation plot showing the critical moment (2.0 Ma) and the time of oil generation (2.0 Ma to present) for the East Breaks 160-161 minibasin petroleum system, assuming that lower Miocene rocks have sourced the hydrocarbons. After Dow et al.;<ref name=ch04r29 />courtesy Gulf Coast SEPM.]]
According to the [[maturation]] model for a middle Miocene [[source rock]], peak oil generation would have begun 0.2 Ma<ref name=ch04r29 /> and the critical moment for the East Breaks 160-161 petroleum system would be 0.20 Ma ([[:File:Sedimentary-basin-analysis_fig4-45.png|Figures 3]] and [[:File:Sedimentary-basin-analysis_fig4-53.png|4]]). If a stratigraphically deeper lower Paleocene or upper Jurassic source rock is the origin of the East Breaks oils, an earlier onset of significant generation could have occurred with [[migration]], continuing to today and supplying the petroleum that has charged the field.
==Summary==
==Summary==
[[Category:Sedimentary basin analysis]]
[[Category:Sedimentary basin analysis]]
[[Category:East Breaks]]
[[Category:East Breaks]]
[[Category:Treatise Handbook 3]]