1,705
edits
Changes
Jump to navigation
Jump to search
East Breaks petroleum geology (view source)
Revision as of 20:07, 30 January 2014
, 20:07, 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
}}
Field development, including step-out drilling, and exploration are enhanced by the understanding of the [[petroleum system]]—especially the occurrence of probable [[source rock]], [[[[migration]] pathways]], and reservoir.
==Generation-migration-accumulation==
Reservoired oils in the East Breaks 160-161 field are more thermally mature than the surrounding sediments, demonstrating that the hydrocarbons were contributed from deeper [[source rocks]]. Their generation history is controlled by the thermal gradient and overburden rock accumulation history, interpreted from both regional depocenter patterns and local minibasin history. Fault and salt-wall migration pathways provide vertical avenues for migration. Slope basin gravity-flow sands are the principal reservoir target in the High Island–East Breaks area for all except the most shallow stratigraphic intervals, where wave-dominated deposition of shelf sands produced laterally continuous sheet-like reservoirs subsequently draped over anticlinal structure.
==Traps==
The gravity-flow sands were transported and deposited within sea-floor physiographic lows between the anticlinal structures and within the isochron thicks of the synclinal sediment fill. Petroleum accumulations occur within traps where these synclinal sandstones are folded over postdepositional anticlines.<ref name=ch04r7>Armentrout, J., M., 1991, Paleontological constraints on depositional [[modeling]]: examples of integration of biostratigraphy and seismic stratigraphy, Pliocene–Pleistocene, Gulf of Mexico, in Weimer, P., Link, M., H., eds., Seismic Facies and Sedimentary Processes of Submarine Fans and Turbidite Systems: New York, Springer-Verlag, p. 137–170.</ref> or within structural-[[stratigraphic trap]]s where synclinal sandstones pinch-out against sea-floor valley margins<ref name=ch04r65>McGee, D., T., Bilinski, P., W., Gary, P., S., Pfeiffer, D., S., Sheiman, J., L., 1994, Geologic models and reservoir geometries of Auger field, deepwater Gulf of Mexico: Proceedings, Gulf Coast Section SEPM 15th Annual Research conference, p. 245–256.</ref> or completely bypassed valley conduits subsequently filled by mudstone plugs<ref name=ch04r36>Galloway, W., E., McGilvery, T., A., 1995, Facies of a submarine canyon fill reservoir complex, lower Wilcox Group (Paleocene), central Texas coastal plain, in Winn, R., D., Jr., Armentrout, J., M., eds., Turbidites and Associated Deep-Water Facies: WEPM Core Workshop 20, p. 1–23.</ref>
==See also==
* [[Summary and exploration strategy for Deepwater sands]]
* [[Exploration strategy for Deepwater sands]]
* [[Stratigraphic predictions from computer simulation]]
==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
}}
Field development, including step-out drilling, and exploration are enhanced by the understanding of the [[petroleum system]]—especially the occurrence of probable [[source rock]], [[[[migration]] pathways]], and reservoir.
==Generation-migration-accumulation==
Reservoired oils in the East Breaks 160-161 field are more thermally mature than the surrounding sediments, demonstrating that the hydrocarbons were contributed from deeper [[source rocks]]. Their generation history is controlled by the thermal gradient and overburden rock accumulation history, interpreted from both regional depocenter patterns and local minibasin history. Fault and salt-wall migration pathways provide vertical avenues for migration. Slope basin gravity-flow sands are the principal reservoir target in the High Island–East Breaks area for all except the most shallow stratigraphic intervals, where wave-dominated deposition of shelf sands produced laterally continuous sheet-like reservoirs subsequently draped over anticlinal structure.
==Traps==
The gravity-flow sands were transported and deposited within sea-floor physiographic lows between the anticlinal structures and within the isochron thicks of the synclinal sediment fill. Petroleum accumulations occur within traps where these synclinal sandstones are folded over postdepositional anticlines.<ref name=ch04r7>Armentrout, J., M., 1991, Paleontological constraints on depositional [[modeling]]: examples of integration of biostratigraphy and seismic stratigraphy, Pliocene–Pleistocene, Gulf of Mexico, in Weimer, P., Link, M., H., eds., Seismic Facies and Sedimentary Processes of Submarine Fans and Turbidite Systems: New York, Springer-Verlag, p. 137–170.</ref> or within structural-[[stratigraphic trap]]s where synclinal sandstones pinch-out against sea-floor valley margins<ref name=ch04r65>McGee, D., T., Bilinski, P., W., Gary, P., S., Pfeiffer, D., S., Sheiman, J., L., 1994, Geologic models and reservoir geometries of Auger field, deepwater Gulf of Mexico: Proceedings, Gulf Coast Section SEPM 15th Annual Research conference, p. 245–256.</ref> or completely bypassed valley conduits subsequently filled by mudstone plugs<ref name=ch04r36>Galloway, W., E., McGilvery, T., A., 1995, Facies of a submarine canyon fill reservoir complex, lower Wilcox Group (Paleocene), central Texas coastal plain, in Winn, R., D., Jr., Armentrout, J., M., eds., Turbidites and Associated Deep-Water Facies: WEPM Core Workshop 20, p. 1–23.</ref>
==See also==
* [[Summary and exploration strategy for Deepwater sands]]
* [[Exploration strategy for Deepwater sands]]
* [[Stratigraphic predictions from computer simulation]]
==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]]