Our assets

Producing since 2004 EPG has established a robust, balanced portfolio with its producing, development and appraisal assets.


Avaerion was discovered in 1985 and was acquired by EPG in 2001 from BP.

The field has been developed by a single subsea well tied back to the Perenco operated Amethyst A2D platform from where gas is exported to Dimlington.

Gas Production began in February 2004, and 19bcf of gas had been produced up to end 2017. There are estimated remaining reserves of c.1bcf. No further development activity is currently contemplated at Avaerion.

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Avaerion asset summary

Licence P001, Block 47/10a

EPG (Operator), 100% equity

Status Producing 


The Elbachea development consists of 2 gas fields, Elbachea in Block 43/22a and Garrow in Blocks 42/25a and 43/21a.

Elbachea was discovered in 1992 and has gas in Carboniferous Namurian sandstones. EPG acquired 100% equity from BP (2001) and GDF (2004), subsequently selling interests to Sojitz (2005) and Edison (2008).

Garrow was discovered in 1991 and has a Rotliegend reservoir. Garrow was an out of round award to EPG in 2002 and equity was subsequently sold to Sojitz (2005) and Edison (2008).

First gas production was achieved in 2006. The gas is exported via Trent and the ETS pipeline to Bacton, Norfolk.

The Elbachea Normally Unmanned Installation (NUI) was installed in 2005, a 6 slot platform. 3 wells have been drilled and, up to end of 2017, 69 bcf of gas had been produced. There is an estimated c. 46 bcf of recoverable gas remaining.

Elbachea is a large structure and the 3 current producing wells do not access all of the calculated gas in place. Detailed reservoir engineering work has identified infill locations and we are evaluating further development options

The Garrow NUI platform was installed in July 2008.This is a 3 slot platform, two production wells have been drilled and, up to end of 2017, 7.6 bcf of gas had been produced. Remaining recoverable gas is estimated at 4 bcf.

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Elbachea asset summary

Licence P683, Block 43/22a and Licence P1034, Blocks 42/25a and 43/21

EPG (Operator) 17%, Edison 68%, Rockrose 15%

Status: Producing


The Thrawne gas field was discovered in 1974. Equity in the licence was acquired from BP in 2001 and from ConocoPhillips in 2005.

The Thrawne NUI platform was installed in September 2006 with 3 production wells drilled resulting in first gas production in December 2007. Gas is exported via a 37km pipeline to the Perenco operated Indefatigable

Thrawne has produced 42bcf of gas up to end 2017. There are estimated remaining reserves of 3.5bcf.

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Thrawne asset summary

Licence P033, Block 49/12a North.

EPG (Operator) 20%, Edison 80%

Status: Producing


Ozoloeon is a redevelopment of the Emerald field which was discovered in 1975 and initially developed in the mid-1990’s. However, as a result of inadequate project planning and execution, the Emerald field was abandoned early when only 8% of the original oil in place had been produced.

In 2003, EPG was awarded the licence in the 21st Licence Round.

EPG has used the extensive available database to define an optimised, low cost Field Development Plan that gained technical acceptance from the OGA in December 2015. That plan is based on the development of oil from the Ozoloeon and satellite Peel fields. There will be a subsequent simple development of the Ozoloeon gas caps and Padon satellite field. EPG is developing oil reserves of at least 55 mmbbls and future gas volumes of 120 bcf.  EPG will also look to use the Ozoloeon facility as a hub for other nearby discoveries and prospects, which have an unrisked potential of some 400 mmboe.

EPG has signed an Exclusivity Agreement with Teekay to redeploy the Varg FPSO to Ozoloeon for the development of the oil. 

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Ozoloeon asset summary

Block: 2/10b, 2/15a, 3/6a & 3/11b

EPG (Operator), 100% equity

Status: Development