United Kingdom Oil and Gas Fields: 50th Anniversary Commemorative Volume

Geological Society Memoir 52 records the extraordinary journey of more than 50 years that has led to the development of some 458 oil and gas fields on the UK Continental Shelf (UKCS). It contains papers on almost 150 onshore and offshore fields in all of the UK's main petroliferous basins. These papers range from look-backs on some of the first-developed gas fields in the Southern North Sea, to papers on fields that have only just been brought into production or may still remain undeveloped, and includes two candidate CO2 sequestration projects.
These papers are intended to provide a consistent summary of the exploration, appraisal, development and production history of each field, leading to the current subsurface understanding which is described in greater detail. As such, the Memoir will be an enduring reference source for those exploring for, developing, producing hydrocarbons and sequestering CO2 on the UKCS in the coming decades. It encapsulates the petroleum industry's deep subsurface knowledge accrued over more than 50 years of exploration and production.
The Laggan and Tormore fields, Blocks 206/1 and 205/5, UK Atlantic Margin
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Published:October 30, 2020
Abstract
The Laggan and Tormore fields are found within the Flett sub-basin of the Faroe–Shetland Basin. Situated 120 km west of the Shetland Islands in 600 m water depth, they are part of the deepest subsea development in the UK to date with a 143 km subsea tie-back to onshore facilities.
The reservoirs are found within the T35 biostratigraphic sequence of the Paleocene Vaila Formation and comprise sand-rich turbiditic channelized lobes with good reservoir properties, separated by metric to decimetric shale packages. Laggan is a gas-condensate field, whereas Tormore fluid is a richer gas with a saturated oil rim. Seismic reservoir characterization is a key to the field development where differentiation of fluid type proved challenging. Both fields came on stream in 2016 as part of the Greater Laggan area development scheme.
- Atlantic Ocean
- Atlantic Ocean Islands
- Cenozoic
- clastic rocks
- condensates
- continental shelf
- Europe
- Faeroe-Shetland Basin
- geophysical methods
- geophysical profiles
- geophysical surveys
- Great Britain
- North Atlantic
- Northeast Atlantic
- oil and gas fields
- Paleocene
- Paleogene
- reservoir properties
- sandstone
- Scotland
- sedimentary rocks
- seismic methods
- seismic profiles
- Shetland Islands
- stratigraphy
- surveys
- Tertiary
- turbidite
- United Kingdom
- upper Paleocene
- Western Europe
- Moray Group
- Laggan Field
- Vaila Formation
- Faroe Group
- Tormore Field