Gas field · UK
North Sean
North Sean is a gas field in the southern North Sea, operated by ONE-Dyas. It was discovered in 1969 and produced from 1986 to 2024. Production has ceased. From June 1989, when its monthly records begin, it produced about 21.2 billion cubic metres of gas.
Production
North Sean produced about 719,000 barrels of oil and condensate and 21.2 billion cubic metres of gas between June 1989 and May 2024. The NSTA's monthly records for the field begin in June 1989, but it started producing in August 1986, so earlier output isn't included.
Latest: 0.015 million cubic metres a day in May 2024. Highest year: 2012, averaging 7.8 million cubic metres a day. Highest month: January 1997.
Latest: 1 barrels a day in May 2024. Highest year: 2005, averaging 180 barrels a day. Highest month: January 1997.
Average production by year
| Year | Oil and condensate, barrels a day | Gas, million m³ a day |
|---|---|---|
| 2024 (Jan–May) | 2 | 0.026 |
| 2023 | 6 | 0.077 |
| 2022 | 7 | 0.1 |
| 2021 | 4 | 0.1 |
| 2020 | 8 | 0.15 |
| 2019 | 11 | 0.21 |
| 2018 | 13 | 0.25 |
| 2017 | 26 | 0.79 |
| 2016 | 120 | 2.1 |
| 2015 | 110 | 2.4 |
| 2014 | 140 | 2.8 |
| 2013 | 67 | 3.4 |
| 2012 | 120 | 7.8 |
| 2011 | 20 | 2.1 |
| 2010 | 19 | 0.5 |
| 2009 | 30 | 1.7 |
| 2008 | 100 | 3.6 |
| 2007 | 0 | 1.1 |
| 2006 | 88 | 2.6 |
| 2005 | 180 | 4.9 |
| 2004 | 33 | 0.83 |
| 2003 | 80 | 1.6 |
| 2002 | 38 | 1.3 |
| 2001 | 180 | 4 |
| 2000 | 41 | 1.6 |
| 1999 | 9 | 0.86 |
| 1998 | 6 | 0.14 |
| 1997 | 83 | 1.8 |
| 1996 | 130 | 2.6 |
| 1995 | 77 | 1.2 |
| 1994 | 89 | 1.4 |
| 1993 | 40 | 0.51 |
| 1992 | 68 | 0.85 |
| 1991 | 13 | 1.1 |
| 1990 | 0 | 1.6 |
| 1989 (Jun–Dec) | 0 | 0.016 |
Field details
| Status | Production ceased |
|---|---|
| Type | Gas field |
| Operator | ONE-Dyas |
| Partners |
|
| Original operator | Shell |
| Discovered | April 1969 (well 49/25-1) |
| First production | August 1986 |
| Water depth | 32 m |
| Region | Southern North Sea |
| Wells inside the outline | 11 |
Platforms and installations
Licences
The field lies in these 2 current licences:
Nearby
- Fields within 10 km: South Sean (0.4 km), Indefatigable (0.4 km), East Sean (1.3 km), Gawain (5.5 km), Corvette (6 km).
Sources
Production: NSTA, UKCS field production reports (PPRS), monthly to July 2026. Field details, platforms, licences and wells: NSTA open data, as on the atlas map. Contains information provided by the North Sea Transition Authority and/or other third parties. Used under the NSTA Open User Licence.
Offshore Data Atlas converts the reported volumes to barrels and cubic metres a day (one cubic metre is 6.29 barrels). UK gas figures are all the gas produced, including gas used offshore as fuel, flared or put back into the reservoir.