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    This document is intended to provide an introduction for non-specialists to the key activities and potential sources of environmental effects associated with oil and gas exploration and production. It forms part of the information base for the Department of Trade and Industry's (now Department of Energy and Climate Change) Strategic Environmental Assessment (SEA2) process in the North Sea.

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    This report is a contribution to the Strategic Environmental Assessment (SEA3) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). This study provides forecast information on probable activity levels, capital expenditure, tax revenues and employment resulting from exploration and production in the SEA3 area. The SEA3 area comprises 330 blocks or part blocks in the Central and Southern North Sea. Estimates were made of the reserves which might be discovered or developed. A cautious view was taken of the number of new developments which might emanate from licensing the area. The related exploration, appraisal, development and decommissioning costs were then estimated. Economic modelling was undertaken for different oil and gas prices to calculate for each development gross revenues, development costs, operating costs, and decommissioning costs. The taxation implications were also calculated. The impact of licensing the SEA3 area on the level of employment in the UK has been calculated. The proposed licensing would make a modest but worthwhile contribution towards moderating the downward trend of employment in the North Sea industry.

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    This report is a contribution to the Strategic Environmental Assessment (SEA4) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). The SEA4 area includes the most northerly part of the UK continental shelf, north of the Shetland Islands between the international boundaries with Norway and the Faroe Islands, and the area to the west of Shetland and the Orkney Islands. Starting with scenarios of possible exploration and development activity in the area provided by the Department of Trade and Industry, this study provides forecasts of oil and gas production, expenditure, employment and tax revenues. The impacts of future oil and gas developments in the SEA4 area on the local economies of Shetland and Orkney will be small in comparison to what has happened in the past. The main impact will be to postpone or to slow down the decline in UK oil production. Nevertheless, production from fields in the area could make significant contributions to overall UKCS production, employment and tax revenues, as well as extending the lives of facilities such as the Sullom Voe and Flotta terminals. It could help to retain employment and population in the area.

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    This report is a contribution to the Strategic Environmental Assessment (SEA2) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). SEA2 focuses on the mature areas of the North Sea UK continental shelf which is divided into 3 areas - Northern, Central and Southern North Sea. The socio-economic effects of licensing the SEA2 area are discussed. The scope of the study includes estimates of the reserves which might be discovered and developed, and the related exploration, appraisal, development and decommissioning costs. The possible phasing of these activities through time is also examined. The effects of the development of new fields in extending the lives of existing ones and the implications for the provision of necessary infrastructure onshore are also examined. The employment generated directly and indirectly in the 3 sub-areas is estimated. The distinction is made between employment at the various stages in the exploration, development and production activities. The significance of the employment opportunities provided for the long-term maintenance of a skilled workforce is also considered.

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    This report is a contribution to the Strategic Environmental Assessment (SEA5) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). This report assesses the socio-economic implications of licensing the SEA 5 area and sets out the results in relation to: oil and gas production, and reserves; capital, operating and decommissioning expenditure; employment; tax revenue; social impacts. The Department of Trade and Industry provided scenarios of possible exploration and development activity in the area and these scenarios were converted into optimistic and pessimistic scenarios. They were then used to produce forecasts of: oil and gas production; oil and gas reserves; expenditure; employment; and tax revenues. The implications for existing facilities in the area are discussed and the potential social impacts.

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    This report is a contribution to the Strategic Environmental Assessment (SEA7) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change).The purpose of this report is to provide an initial assessment of what is termed the Other Users of the SEA 7 area. These other users include those significant human activities and infrastructure occurring in the marine and coastal zone, and not addressed by other SEA 7 data reports. Fisheries and maritime archaeology (wrecks) are therefore excluded. The report summarises current activity in the area, and where possible discusses likely future trends. It also summarises the relevance of each activity to any future proposed oil and gas activity. Where appropriate, comment is made about the potential sensitivity of an Other User to oil and gas development, or the potential restrictions to oil and gas development presented by existing users.

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    This report is a contribution to the Strategic Environmental Assessment (SEA6) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). This "Economic and Social Baseline Study" provides baseline information on the key economic activities in the SEA 6 area, namely: offshore oil and gas; offshore wind farms; ports, ferries and other shipping services; fishing; tourism; other marine-related activities. A separate report (SEA6 Socio Economics) by the same authors assesses the socio-economic implications of further oil and gas licensing in the SEA6 area.

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    This report is a contribution to the Strategic Environmental Assessment (SEA3) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). The report is a synthesis of information on human activities which might have an impact on, or themselves be affected by, further oil and gas developments in the SEA3 area of the North Sea. The activities include shipping, energy (both existing oil and gas developments and renewable energy), telecommunications, military activities, waste disposal, dredging and aggregate extraction, marine archaeological sites and wrecks. The SEA3 area hosts a wide variety of different users. Some have been there for centuries, others are more recent arrivals. Among the older industries and activities are fisheries, ports and shipping, military activities and sea bathing. The offshore oil and gas industry has developed into a major player in the North Sea since the late 1960s, with considerable infrastructure of pipelines and coastal gas terminals in the SEA3 area. The number of submarine telecommunication cables across the North Sea has grown enormously in the past ten years, with the advent of the fibre optic cable and the growth of the Internet and e-commerce. The next twenty years may see considerable development of offshore wind farms in the SEA3 area.

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    This report is a contribution to Strategic Environmental Assessment SEA2 conducted by the Department of Trade and Industry (now Department of Energy and Climate Change) and it considers human activities in the North Sea which might have an impact on, or themselves be affected by, further oil and gas developments in the SEA2 areas. The SEA2 areas cover the Northern North Sea (NNS), the Central North Sea (CNS) and the Southern North Sea (SNS). The activities include shipping, energy (both existing oil and gas developments and renewable energy), telecommunications, military activities, waste disposal, dredging and aggregate extraction, marine archaeological sites and wrecks. Commercial fishing is the subject of a separate report.

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    This report is a contribution to the Strategic Environmental Assessment (SEA4) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). This report is a synthesis of information on human activities which might have an impact on, or themselves be affected by, further oil and gas developments in the SEA4 area. The activities include fishing, mariculture, shipping, energy (both existing oil and gas developments and renewable energy), telecommunications, military activities, waste disposal, dredging and aggregate extraction, tourism, coastal and marine archaeological sites. The SEA4 area hosts a wide variety of different users. Some have been there for centuries, others are more recent arrivals. Among the older industries and activities are fisheries, ports and shipping and military activities; the oil and gas industry and mariculture are newer arrivals. Orkney and Shetland have provided major infrastructure for the North Sea oil and gas industry since the 1970s, and there have been producing oil fields to the west of Shetland since 1997. Finfish and shellfish farming are important industries in the coastal regions of the SEA4 area.