Chevron has interests in seven non-operated fields in the United Kingdom: Britannia, Brodgar, Callanish, Clair, Elgin/Franklin, Enochdhu and Jade. In 2018, these interests contributed a significant proportion of Chevron’s total net daily production in the U.K., which averaged 27,000 barrels of oil equivalent per day.
The Britannia field lies approximately 130 miles (210 km) northeast of Aberdeen, Scotland, in the Central North Sea, in water depths of approximately 480 feet (146 m).
Discovered in 1975 and extending across Blocks 15/29a, 15/30, 16/26, 16/27a and 16/27b, Britannia was one of the largest natural gas and condensate fields in the North Sea when first production was achieved in 1998. The field includes a drilling, production and accommodation platform and a bridge linked platform at its eastern end.
Britannia condensate is delivered through the Forties Pipeline System to the oil stabilisation and processing plant, Kerse of Kinneil, near the Grangemouth Refinery in Scotland. Britannia gas is transported through a dedicated Britannia Gas Pipeline to the Scottish Area Gas Evacuation facility at St. Fergus, Scotland. The Brodgar, Callanish and Enochdhu fields have been developed as satellites of the Britannia field. The Chevron operated Alder development is also a satellite of the Britannia field. Production started at Alder in November 2016.
The Britannia field is operated by ConocoPhillips (U.K.) Britannia Limited. Chevron North Sea Limited holds a 32.38 percent non-operated working interest in the field alongside its coventurers ConocoPhillips (U.K.) Limited (42.41 percent), ConocoPhillips (U.K.) Theta Limited (9.01 percent), ConocoPhillips Petroleum Company U.K. Limited (7.23 percent) and Mitsui E&P UK Limited (8.97 percent).
brodgar and callanish
The Brodgar gas condensate field lies 89 miles (143 km) north-east of Aberdeen, Scotland, in the Central North Sea, in water depths of about 460 feet (140 m). Brodgar is operated by ConocoPhillips (U.K.) Limited; Chevron North Sea Limited currently has a 6.3 percent non-operated working interest in the field.
The Callanish oil field lies 98 miles (158 km) north-east of Aberdeen, Scotland, in the Central North Sea, in water depths of about 490 feet (150 metres). Callanish is operated by ConocoPhillips (U.K.) Limited; Chevron North Sea Limited holds a 16.5 percent non-operated working interest in the field.
Both fields have been developed as satellites of the Britannia field and are tied back to the bridge linked platform connected to the Britannia facility. First production from Callanish and Brodgar fields was achieved in 2008.
The Enochdhu oil field lies 100 miles (160 km) northeast of Aberdeen, Scotland, in the Central North Sea, in water depths of approximately 460 feet (140 m). Developed as a single subsea well tied back via pipeline to the nearby Callanish subsea manifold and onwards to the Britannia field facilities, Enochdhu achieved first production in June 2015. It is operated by ConocoPhillips (U.K.) Limited; Chevron North Sea Limited holds a 50 percent non-operated working interest in the field.
The Clair field lies 47 miles (75 km) west of the Shetland Islands in the North Sea and extends over an area of 85 square miles (220 square km) in water depths of approximately 460 feet (140 m). Discovered in 1977, across Blocks 206/7a, 206/8, 206/9, 206/12 and 206/13a. Clair is one of the United Kingdom’s largest hydrocarbon resources. Oil and gas are exported via pipelines to the Sullom Voe Terminal on the Shetland Islands.
The Clair field is being developed using a phased approach. Clair Phase 1 was sanctioned in 2001 and was developed with a single fixed platform with production and processing facilities. First production was achieved in February 2005.
The second phase of development, the $10 billion Clair Ridge project, is designed to have a capacity of 120,000 barrels of crude oil and 100 million cubic feet of natural gas per day. The project was sanctioned in 2011 and in 2016 the construction and installation of two new bridge-linked platforms was completed. First oil was achieved in November 2018.
Proved reserves have been recognised for the Clair Ridge project which is estimated to produce over 600 million barrels and has an estimated production life extending through to 2050.
A six well appraisal and exploration drilling programme was conducted from 2013 into 2015 and following encouraging results, a third phase of development, Clair South, is currently under assessment.
Clair is operated by BP Exploration Operating Company Limited; Chevron North Sea Limited holds a 19.4 percent non-operated working interest in the field.
The Elgin-Franklin area is made up of four gas-condensate fields – Elgin, Franklin, Glenelg and West Franklin – located in the Central North Sea, 130 miles (240 kilometres) east of Aberdeen, in water depths of approximately 305 feet (93 metres). All fields are operated by Total E&P U.K. Limited and Chevron North Sea Limited holds a 3.9% non-operated working interest in Elgin, Franklin and West Franklin. Chevron does not have interest in the Glenelg field.
The Elgin and Franklin fields commenced production in 2001, with production from Glenelg starting in 2006 and West Franklin (phase one) in 2007. Collectively the fields form the largest high-pressure high-temperature development in the world and contain the world's hottest, high-temperature field, West Franklin. In 2015, first production from the second phase of the West Franklin development commenced.
Improved reservoir management and advanced drilling technology are helping maximise economic recovery from the Elgin-Franklin area.
Jade asset is a high-pressure high-temperature gas field operated by ConocoPhillips Petroleum Company U.K. Limited as a Normally Unattended Installation (NUI). It is run as a satellite to the third party operated Judy installation (which hosts the primary Jade facilities). Chevron North Sea Limited has a 19.93 percent non-operated working interest.