Deben

(Tullow)

Offshore oil field in production.

Block and licence number:

49/28 P 37

Map reference:

Plate 6

Grid reference:

1° 34’ E 61° 28’ N

Licensees and company interest in block (%) at end of 2001:

Tullow Exploration Ltd

43.34

Superior Oil (UK) Ltd

23.33

Agip (UK) Ltd

23.33

Centrica Resources Ltd

10.00

Date of discovery:

Feb 1974

Production start:

October 1988

Operator’s estimate of:

Recoverable reserves originally present (million tonnes):

1.29

First year of peak production:

1991

Peak production (million tonnes per year):

0.30

Water depth:

164m

Gravity:

40º API

Sulphur content:

0.20%

Transport system:

Liquids piped to Sullom Voe through Thistle platform.

Extension into other UK blocks:

Block number, licence number and licensee/company interest in block (%) at end of 2000:

211/13a, 211/14, P.296

211/19a, P.104

Remarks:

Subsea development. Liquid co-mingled with Thistle and Deveron productions.