Alaska North Slope National Energy Strategy initiative: Analysis of five undeveloped fields

Thomas, C.P.; Allaire, R.B.; Doughty, T.C.; Faulder, D.D.; Irving, Justin; Jamison, H. C.; White, Gregory J.

doi:10.2172/10158489

Cited by 4 publications

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“…Known Oil and Gas Accumulations, Selected Dry Holes and Suspended Wells, and NPRA-ANWR Boundaries, North Slope, Alaska (Thomas et al, 1991) Western North Slope Stratigraphic Column with Kuparuk River Interval Highlighted (Bird, 1987) Lower Cretaceous Unconformity (LCU) Cutting Across the Kuparuk River Formation (Gaynor and Scheihing, 1989) Gwydyr Bay Base Map Showing Cross Section B-B' (adapted from Thomas et al, 1993) Kuparuk Reserves at Gwydyr Bay (Thomas et al, 1993) Cross Section Across Gwydyr Bay Illustrating Possible OilTrapping Structure (Thomas et al, 1993) Base Map Showing Niakuk Field Location (from Thomas et al, 1993 Niakuk Field Well Locations with Cross Section C-C' Highlighted (adapted from Thomas et al, 1993) Other hydrocarbon-bearing formations at Prudhoe Bay include the Triassic Shublik and Sag River formations, both of which overlie the Sadlerochit group.…”

Section: List Of Figuresmentioning

confidence: 99%

“…Porosity is predominately secondary, and is a function of facies distributions, dolomitization, and leaching (Thomas et al, 1993). Occasional vuggy dolomitic porosities up to 20% can be found.…”

Section: Sand Qualitymentioning

confidence: 99%

“…1 being the most successful. It tested 2263 BOPD, and was the first Gwydyr Bay field well to be certified by the state as a producer (Thomas et al, 1993). Of these five wells, four tested hydrocarbons in the Sadlerochit group or the Kuparuk River formation, with the Sadlerochit group being the most promising.…”

Section: Gwydyr Bay Fieldmentioning

confidence: 99%

“…Gwydyr Bay oil potential is derived from two probable accumulations (Thomas et al, 1993). River sandstone at a drill depth below 12,200 feet (Thomas et al, 1993 Thomas et al, 1993).…”

Section: Ix-12mentioning

confidence: 99%

“…6 from the same island. This well produced an average of 4737 BOPD of 26°API gravity oil and 3.12 MMCFPD of gas at a subsea depth approximately 9500 ft subsea (Thomas et al, 1993). With these successes, British Petroleum Alaska initially planned to expand the Niakuk well No.…”

Section: Ix-17mentioning

confidence: 99%

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Characterization of oil and gas reservoir heterogeneity; Final report, November 1, 1989--June 30, 1993

Sharma¹

1993

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Section: List Of Figuresmentioning

confidence: 99%

Section: Sand Qualitymentioning

confidence: 99%

Section: Gwydyr Bay Fieldmentioning

confidence: 99%

“…Gwydyr Bay oil potential is derived from two probable accumulations (Thomas et al, 1993). River sandstone at a drill depth below 12,200 feet (Thomas et al, 1993 Thomas et al, 1993).…”

Section: Ix-12mentioning

confidence: 99%

Section: Ix-17mentioning

confidence: 99%

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Characterization of oil and gas reservoir heterogeneity; Final report, November 1, 1989--June 30, 1993

Sharma¹

1993

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Arctic Alaska Basin, Hanna Trough and Beaufortian Rifted Margin Composite Tectono-Sedimentary Elements

Houseknecht¹

2021

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The Arctic Alaska region includes three composite tectono-sedimentary elements (CTSEs): the (1) Arctic Alaska Basin (AAB), (2) Hanna Trough (HT), and (3) Beaufortian Rifted Margin (BRM) CTSEs. These CTSEs comprise Mississippian to Lower Cretaceous (Neocomian) strata beneath much of the Alaska North Slope, the Chukchi Sea and westernmost North Slope, and Beaufort Sea, respectively. These sedimentary successions rest on Devonian and older sedimentary and metasedimentary rocks, considered economic basement, and are overlain by Cretaceous to Cenozoic syn- and post-tectonic strata deposited in the foreland of the Chukotka and Brooks Range orogens and in the Amerasia Basin. (1) The Mississippian-Neocomian AAB CTSE includes two TSEs: (a) The Ellesmerian Platform TSE comprises mainly shelf strata of Mississippian to Middle Jurassic age and includes a relatively undeformed domain in the north and a fold-and-thrust domain in the south. (b) The Beaufortian Rift Shoulder TSE includes Middle Jurassic to Neocomian deposits related to rift-shoulder uplift. (2) The HT CTSE includes four TSEs: (a) The Ellesmerian Syn-Rift TSE comprises Late Devonian(?) to Middle Mississippian growth strata deposited in grabens and half grabens during intracontinental rifting. (b) The Ellesmerian-Beaufortian Sag-Basin TSE comprises Middle Mississippian to Upper Triassic strata deposited in a sag basin following cessation of rifting. (c) The Beaufortian Syn-Rift TSE comprises Jurassic to Neocomian graben-fill deposits related to rifting in the Amerasia and North Chukchi Basins. (d) The Beaufortian Rift-Shoulder TSE comprises Jurassic to Neocomian strata related to rifting and deposited outside rift basins. (3) The BRM CTSE includes two TSEs: (a) The Beaufortian Syn-Rift TSE comprises Middle Jurassic to Neocomian syn-rift strata deposited on attenuated continental crust associated with opening of the Amerasia Basin. (b) The Ellesmerian Platform TSE comprises mainly shelf strata of Mississippian to Middle Jurassic age that lie beneath Beaufortian syn-rift strata.The AAB, HT, and BRM CTSEs contain oil-prone source rocks in Triassic, Jurassic, and Cretaceous strata and proven reservoir rocks spanning Mississippian to Lower Cretaceous strata. A structurally high-standing area in the northern AAB CTSE, northern HT CTSE, and southernmost BRM CTSE lies in the oil window whereas all other areas lie in the gas window. Known hydrocarbon accumulations in the three CTSEs total more than 30 billion barrels of oil equivalent and yet-to-find estimates suggest a similar volume remains to be discovered.

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Colville Foreland Basin and Arctic Alaska Prograded Margin Tectono-Sedimentary Elements, northern Alaska and southwestern Canada Basin

Houseknecht¹

2022

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Cretaceous (post-Neocomian) to Quaternary Brookian strata of Arctic Alaska include the Colville Foreland Basin (CFB) and Arctic Alaska Prograded Margin (AAPM) Tectono-Sedimentary Elements (TSEs). The CFB TSE lies beneath the Alaska North Slope and Chukchi Sea shelf and the AAPM TSE lies beneath the Arctic Alaska continental terrace of the Beaufort Sea shelf and slope. The CFB TSE rests on rocks ranging from pre-Mississippian sedimentary and metasedimentary rocks (Franklinian sequence) to Lower Cretaceous strata and is present at the land surface onshore and the seafloor offshore. The AAPM TSE generally rests on Lower Cretaceous (Neocomian) sedimentary strata and is present at the seafloor.The CFB and AAPM TSEs contain oil-prone source rocks in Cretaceous and Paleogene strata and have been charged locally by hydrocarbon migration from pre-Brookian strata. Both TSEs contain proven reservoir rocks throughout the succession. The CFB TSE ranges from oil-window to gas-window maturity. The AAPM TSE mainly is in the gas window. Known hydrocarbon accumulations in the two TSEs total more than 3.4 billion barrels of oil equivalent and yet-to-find estimates suggest an even larger volume remains undiscovered. Current exploration is focused on shallow stratigraphic traps, in which giant oil accumulations have been discovered in recent years.

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Alaska North Slope National Energy Strategy initiative: Analysis of five undeveloped fields

Cited by 4 publications

References 0 publications

Characterization of oil and gas reservoir heterogeneity; Final report, November 1, 1989--June 30, 1993

Characterization of oil and gas reservoir heterogeneity; Final report, November 1, 1989--June 30, 1993

Arctic Alaska Basin, Hanna Trough and Beaufortian Rifted Margin Composite Tectono-Sedimentary Elements

Colville Foreland Basin and Arctic Alaska Prograded Margin Tectono-Sedimentary Elements, northern Alaska and southwestern Canada Basin

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