Permian-triassic paleogeography and stratigraphy of the west Netherlands basin

Conference · Wed Sep 01 04:00:00 EDT 1993 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:7134280

Speksnijder, A ^[1]

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1. Nederlandse Aardolie Maatschappij, Assen (Netherlands)

During the Permian, the present West Netherlands basin (WNB) was situated at the southernmost margin of the southern Permian basin (SPB). The thickness of Rotilegende sandstones therefore is very much reduced in the WNB. The relatively thin deposits of the Fringe Zechstein in the WNB, however, also contrast strongly in sedimentary facies with thick evaporite/carbonate alternations in the main SPB to the north, although the classic cyclicity of Zechstein deposition still can be recognized. The Fringe Zechstein sediments are mainly siliciclastic and interfinger with both carbonates and anhydrites toward the evaporite basin. End members are thin clay layers that constitute potential seals to underlying Rotliegende reservoirs and relatively thick sandstones (over 100 m net sand) in the western part of the WNB. Nevertheless, favorable reservoir/seal configurations in the Fringe Zechstein seem to be sparse because only minor hydrocarbon occurrences have been proven in the area to date. The situation is dramatically different for the Triassic in the WNB. The [open quotes]Bunter[close quotes] gas play comprises thick Fringe Buntsandstein sandstones (up to 250 m), vertically sealed by carbonates and anhydritic clays of the Muschelkalk and Keuper formations. The Bunter sandstones are largely of the same age as the classic Volpriehausen, Detfurth, and Hardegsen alluvial sand/shale alternations recognized elsewhere, but the upper onlapping transgressive sands and silts correlate with evaporitic clays of the Roet basin to the north. A total volume of 65 x 10[sup 9]m[sup 3] of gas has so far been found in the Triassic Bunter sandstones of the WNB.

• OSTI ID: 7134280
• Report Number(s): CONF-9310237--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 77:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
CARBON COMPOUNDS
CARBONATE ROCKS
CARBONATES
CHEMICAL ANALYSIS
CLAYS
DEPOSITION
DEVELOPED COUNTRIES
EUROPE
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGY
HYDROCARBONS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NETHERLANDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PALEOZOIC ERA
PERMIAN PERIOD
QUANTITATIVE CHEMICAL ANALYSIS
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEALS
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
SHALES
SILT
STRATIFICATION
STRATIGRAPHY
VOLUMETRIC ANALYSIS
WESTERN EUROPE