Play fairway analysis and risk mapping: an example using the Middle Jurassic Brent Group in the northern North Sea

1996 ◽  
pp. 167-181
Author(s):  
Shona Grant ◽  
Nick Milton ◽  
Mark Thompson
Keyword(s):  
North Sea ◽  
Middle Jurassic ◽  
Risk Mapping ◽  
Northern North Sea

The Osprey Field, Blocks 211/18a & 211/23a, UK North Sea*

1991 ◽  
Vol 14 (1) ◽  
pp. 183-189 ◽  
Author(s):  
John W. Erickson ◽  
C. D. Van Panhuys
Keyword(s):  
Crude Oil ◽  
North Sea ◽  
Water Depth ◽  
Middle Jurassic ◽  
Reservoir Quality ◽  
Shetland Islands ◽  
Delta System ◽  
Reservoir Sandstones ◽  
Northern North Sea ◽  
The Uk

AbstractThe Osprey Oilfield is located 180 km northeast of the Shetland Islands in Blocks 211/23a and 211/18a in the UK sector of the northern North Sea. The discovery well 211/23-3 was drilled in January 1974 in a water depth of 530 ft. The trap is defined at around 8500 ft TVSS by two dip and fault closed structures, the main 'Horst Block' and the satellite 'Western Pool'. The hydrocarbons are contained in reservoir sandstones belonging to the Middle Jurassic Brent Group which was deposited by a wave-dominated delta system in the East Shetlands Basin. The expected STOIIP and ultimate recovery are estimated at 158 MMBBL and 60 MMBBL of oil respectively, which represents a recovery factor of 38%. The 'Horst Block' contains 85% of the reserves with an OOWC about 150 ft shallower than in the 'Western Pool'. Reservoir quality is excellent, with average porosities varying from 23-26% and average permeabilities varying from 35-5300 md. The development plan envisages eleven satellite wells, six producers and five water injectors, closely clustered around two subsea manifolds. First production is expected in late 1990/early 1991. The wet crude oil will be piped to the Dunlin 'A' platform for processing and from there to the Cormorant Alpha platform into the Brent System pipeline for export to the Sullom Voe terminal.

The Ninian Field, Blocks 3/3 & 3/8, UK North Sea

1991 ◽  
Vol 14 (1) ◽  
pp. 175-182 ◽  
Author(s):  
E. J. Van Vessem ◽  
T. L. Gan
Keyword(s):  
North Sea ◽  
Middle Jurassic ◽  
Water Flooding ◽  
The West ◽  
West Side ◽  
Field Development ◽  
Fault Block ◽  
Northern North Sea ◽  
Original Oil In Place

AbstractThe Ninian Field, located in the northern North Sea, lies in the East Shetland Basin on the west side of the Viking Graben. The field straddles Blocks 3/3 and 3/8 and is developed under a unitization agreement with Chevron UK Limited as operator. The structure is a westward tilted fault block. The estimated original oil-in-place contained in the marine-deltaic sandstones of the Middle Jurassic Brent Group, is 2920 MMBBL, of which an estimated 35 to 40% is recoverable. The oil is a paraffinic-naphthenic type with an API gravity of 36°. The field development consists of three fixed platforms with a total of 109 drilling slots. The natural drive in the field is negligible so that water flooding is required. The production of the Ninian Field started in December 1978 and reached a peak of 315 000 BOPD in the summer of 1982. At the end of 1988 over 811 MMBBL had been produced.

The Don Field, Blocks 211/13a, 211/14, 211/18a, 211/19a, UK North Sea

2003 ◽  
Vol 20 (1) ◽  
pp. 257-263
Author(s):  
A. D. Milne ◽  
A. M. Brown
Keyword(s):  
North Sea ◽  
Middle Jurassic ◽  
Water Injection ◽  
Oil Production ◽  
Injection Well ◽  
Northern North Sea

abstractCumulative oil production to the end of 2000 from the Don Field was 15.4 MMBBLS, which with an estimated STOIIP of 152 MMBBLS represents a recovery to date of 10%. Don has been producing for over ten years. The field lics 15 km N of the Thistle Field, at the western edge of the Viking Graven in the northern North Sea. The structure of the field is complex, and it comprises several segments, the two larges of which have been developed, Don NE and Don SW. The reservoir sequence is Middle Jurassic Brent Formation. But more deeply buried and of a more distal facies than is typical for other fields in the province.The Don Field is a sub-sea development tied-back to the Thistle platform, and Britoil (BP) is the operator. The field has been developed with five producers, three in NE andtwo is SW, with a supporting water injection well in each part of the field. All wells have been drill deviated from a seabed manifold located over Don NE.

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