The Oseberg field

Conference · Sat Sep 01 04:00:00 EDT 1990 · AAPG Bulletin (American Association of Petroleum Geologists); (USA)

OSTI ID:5969048

Kvalheim, B; Hagen, J ^[1]

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1. Norsk Hydro, Oslo (Norway)

The Oseberg field is located in the Norwegian North Sea in Blocks 30/6 and 30/9, approximately 140 km northwest of Bergen, Norway. The field came on stream December 1988. The field comprises three major easterly tilted fault blocks called Alpha, Gamma, and Alpha North. The hydrocarbons are contained in the sandstones of the deltaic Middle Jurassic Brent Group. The Brent Group exhibits excellent reservoir properties with porosities around 20-30% and permeabilities ranging up to several darcys. The gross Brent thickness ranges mainly between 50 and 190 m. The maximum extension of the field is 27 km, and the maximum width is about 6.5 km. The structural dip is normally 6-10{degree} east-northeast. The presence of gas caps has been proven by wells both on the Alpha and Gamma structures. The vertical gas column on Alpha is 380 m and the oil column is 210 m, thus giving a total hydrocarbon column of about 600 m. Reservoir engineering studies have shown that the ultimate oil recovery will be larger by gas flooding compared to water flooding. Consequently, pressure maintenance by gas injection has been chosen as the production mechanism for the Alpha and Gamma structures. To get sufficient gas for injection, large quantities of gas have to be imported from the huge Troll field via a 48-km-long pipeline. The Alpha North structure is planned to be produced mainly by water injection. On the Oseberg field itself, the development comprises a field center in the southern part of the field (on stream), a production platform in the northern part (in construction), and three subsea wells. The reserves estimate for the field is currently 209 {times} 10{sup 6}Sm{sup 3} of oil and 92 {times} 10{sup 9}Sm{sup 3} of gas.

• OSTI ID: 5969048
• Report Number(s): CONF-9010204--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (USA) Journal Volume: 74:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
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020300 -- Petroleum-- Drilling & Production
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
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58 GEOSCIENCES
580000 -- Geosciences
ATLANTIC OCEAN
ENERGY SOURCES
ENHANCED RECOVERY
EUROPE
FLUID INJECTION
FOSSIL FUELS
FUELS
GAS INJECTION
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FAULTS
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GEOLOGY
JURASSIC PERIOD
MESOZOIC ERA
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH SEA
NORWAY
OIL FIELDS
OIL WELLS
PETROLEUM
PETROLEUM DEPOSITS
POROSITY
PRODUCTION
RECOVERY
RESERVES
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SCANDINAVIA
SEAS
SEDIMENTARY ROCKS
SURFACE WATERS
WATERFLOODING
WELLS
WESTERN EUROPE