Strategic Environmental Assessment (SEA) data portal

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The Department of Trade and Industry (now BEIS) began a sequence of sectoral SEAs of the implications of further Licencing of the UK Continental Shelf (UKCS) for oil and gas exploration and production in 1999.

The SEA Process subdivided the UKCS into eight areas shown on the adjacent map and listed below; beginning in 2008, integrated Offshore Energy SEAs have been undertaken that cover the whole UKCS.

SEA Data Portal interface
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SEA: Data Portal user interface. Source: BGS © UKRI.

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An integral part of the SEA programme has been a series of research and monitoring surveys commissioned to acquire new data about the offshore environment and used to help inform the relevant SEAs.

Technical reports describing the surveys are available from Offshore Energy SEA and also from this site.

To enable free and open access to data collected during the SEA surveys, BEIS has commissioned BGS to develop and maintain this data portal with the aim of providing all reports and datasets associated with each SEA.

Find SEA data and reports

Search using forms or a map index to find data and documents by their SEA area, subject and type.

Search SEA data portal

More about Strategic Environmental Assessment (SEA) data

Name Area Sector Licencing / Leasing Round Year
SEA 1The deep water area along the UK and Faroese boundaryOil & Gas19th Round2001
SEA 2The central spine of the North Sea which contains the majority of existing UK oil and gas fieldsOil & Gas20th Round2002
SEA 2 ExtensionOuter Moray FirthOil & Gas20th Round2002
SEA 3The remaining parts of the southern North SeaOil & Gas21st Round2003
R2Three strategic regions off the coasts of England and Wales in relation to a second round of offshore wind leasingOffshore wind2nd Round2003
SEA 4The offshore areas to the north and west of Shetland and OrkneyOil & Gas22nd Round2004
SEA 5Parts of the northern and central North Sea to the east of the Scottish mainland, Orkney and ShetlandOil & Gas23rd Round2005
SEA 6Parts of the Irish SeaOil & Gas24th Round2006
SEA 7The offshore areas to the west of ScotlandOil & Gas25th Round2008
OESEAUK offshore waters and territorial waters of England and WalesOffshore wind
Oil & Gas
26th Round2009
OESEA2UK offshore waters and territorial waters of England and WalesOil & Gas, Offshore wind, wave and tidal, gas and carbon dioxide storage27th Round
28th Round
OESEA3UK offshore waters and territorial waters of England and WalesOil & Gas, Offshore wind, wave and tidal, gas and carbon dioxide storage29th Round

30th Round

31st Round

32nd Round






Data types

The following data types are available:

  • data files (in a variety of specialist formats)
  • maps
  • processed data
  • processed images
  • raw data
  • raw images
  • still images – photographs
  • reports
  • video

Data access and copyright

The data available from this website were produced as part of the Department for Business, Energy & Industrial Strategy’s Offshore Energy Strategic Environmental Assessment programme; Crown Copyright, all rights reserved. The BEIS SEA must be acknowledged in any maps or publications that make use of the data. All the data files are freely available to the public.

Many files can be downloaded directly from this website. Those that are too large to download can be ordered via the website for postal delivery from BGS.


BGS (NERC) has been contracted by BEIS to publish SEA datasets on its behalf.

All intellectual property rights (including , without limitation, copyrights, database rights and all other rights which subsist or may at any time in the future subsist in the Dataset(s)) in the Dataset(s) (‘Intellectual Property Rights’) are owned by BEIS (formerly the Department of Trade and Industry, and the Department for Business, Enterprise and Regulatory Reform and the Department of Energy and Climate Change).

Data are made available under the Open Government Licence (OGL).Use of this data is subject to [2] NGDC Terms and Conditions.


The site is run and managed by BGS on behalf of BEIS.

The purpose of the website is to:

  • provide simple and easy access to the datasets that have been collected to date
  • collect all the raw and interpreted datasets and published reports and store them in one repository for the foreseeable future


The principal regulator of the offshore oil and gas industry and has overall responsibility for the SEA process.

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