ULA

Discovery year
1976
Wellbore
Status
Producing
Licence

Operator:

Aker BP ASA

Area:

North sea

Production start:

06.10.1986

Historical investments per 31.12.2016:

16 936 MILL NOK (nominal)

Future investments from 2017:

2 823 MILL NOK (real 2017 NOK)

PRODUCTION FROM THE FIELD

Source: The Norwegian Petroleum Directorate

Print illustration Download data PRODUCTION FROM THE FIELD Download PDF Download as image (PNG)

PRODUCTION FROM THE FIELD

Development

Ula is a field located in the southern part of the Norwegian sector in the North Sea. The water depth in the area is 70 metres. Ula was discovered in 1976, and the plan for development and operation (PDO) was approved in 1980. The development consists of three conventional steel facilities for production, drilling and accommodation, which are connected by bridges. Production started in 1986. The gas capacity at Ula was upgraded in 2008 with a new gas processing and gas injection module (UGU) that doubled the capacity. A PDO exemption for the Trias reservoir was granted in 2015. Ula is the processing facility for the Tambar, Blane and Oselvar fields.

Reservoir

Ula produces oil mainly from sandstone in the Upper Jurassic Ula Formation. The reservoir lies at a depth of 3,345 metres. It consists of three units, and two of them are producing well. There is also production from part of the underlying Triassic reservoir at a depth of 3,450 metres. This is a tight sandstone reservoir with low effective permeability.

Recovery

Oil was initially recovered by pressure depletion, but after some years water injection was implemented to improve recovery. Water alternating gas injection (WAG) started in 1998. The WAG program has been extended with gas from Tambar (2001), Blane (2007) and Oselvar (2012). Gas lift is used in some of the wells.

Transport

The oil is transported by pipeline via the Ekofisk field to Teesside in the UK. All gas is reinjected into the reservoir to increase oil recovery.

Status

The positive effect of WAG injection resulted in the drilling of additional WAG wells. However, a reduction in gas available from the Oselvar field has led to a postponement of plans for new WAG wells. In 2015, it was decided to develop the Oda discovery as a tie-in to Ula. Gas from Oda will be injected into the Ula reservoir to increase production. Additional gas for injection will be available after production starts from new wells on Tambar.

ACCRUED INVESTMENTS IN NOMINAL NOK

Source: The Norwegian Petroleum Directorate

Print illustration Download data ACCRUED INVESTMENTS IN NOMINAL NOK Download PDF Download as image (PNG)

ACCRUED INVESTMENTS IN NOMINAL NOK

NPD's CURRENT RESOURCE ESTIMATES

All numbers in mill. Sm3 o.e.

Print table Download data NPD's CURRENT RESOURCE ESTIMATES

NPD's CURRENT RESOURCE ESTIMATES – All numbers in mill. Sm3 o.e.
Bookmark
More information

Loading map...

OWNERS

Print illustration Download data OWNERS

OWNERS

DISCOVERIES INCLUDED IN THE FIELD

DISCOVERY
7/12-2 Ula

MORE INFORMATION

Visit the Norwegian Petroleum Directorate's fact pages for more information