EnQuest predicts late-year start-up at North Sea Scolty/Crathes

Offshore staff

LONDONEnQuest has issued a progress report on development enhancement measures at its UK North Sea fields.

Production from Thistle/Deveron was up in the first half of this year by 17%, compared with the same period last year, at 8,966 boe/d.

This reflected the benefit of last year’s drilling activities and a further phase of the field life extension program.

Maintenance, integrity, and life extension projects continue, including a planned two-week shutdown later this year for further field life extension work to increase the capacity of the Thistle platform to handle produced water.

Production at the Don field was up 3% on 1H 2015 at 6,600 boe/d, helped by strong reservoir performance and output from last year’s Ythan well. Production also benefited from the start of gas import, which has increased plant efficiency and reduced platform fuel costs.  
This year’s work program includes chemical treatment and a forthcoming two-week maintenance shutdown, to coincide with a Brent Pipeline System maintenance outage.

Following the default of First Oil in February, EnQuest now has a 78.6% interest in the West Don field. 

At Heather/Broom, production was up 6% on the first half of 2015 at 6,114 boe/d, helped by contributions from a production well on Heather that came onstream last year; reinstatement of water injection to the Broom field in 2Q 2015; and high levels of production efficiency.

The Heather platform completed one year without an unplanned production outage, and the fields have proven particularly responsive to water injection.    

Farther south, EnQuest operates the Greater Kittiwake Area (GKA), fields, including the current Scolty/Crathes tieback development, which is ahead of schedule and under budget. First oil should follow around year-end.

Drilling confirmed that the Scolty reservoir was on prognosis and the Crathes reservoir exceeded expectations, with a small reserves upgrade anticipated.

Related construction work on the GKA platform has progressed well, with all major installed offshore; the subsea scope is also progressing well.  A shutdown is under way to accommodate tie-in work ahead of first oil.  

During 2Q, EnQuest discovered oil with a well on the Eagle prospect. Results indicate a Fulmar oil-bearing reservoir with a vertical thickness of 67 ft (20.4 m) and good reservoir properties.

The well encountered no oil/water contact, suggesting upside volumes on the flank of the structure. EnQuest expects to recover around 6 MMbbl via a low-cost GKA tieback.

By March 2016, six Alma/Galia production wells had been commissioned and all were onstream by early 2Q.

The K2 (AP5) well cleaned up naturally after various weeks of production, resulting in a substantial increase in output. Chemical treatment on K1 (AP4) has been successful and a recent workover of the K3z (AP1) well helped increase Alma/Galia production levels to an average of 18,785 boe/d last month.

Currently well K7 is being drilled as a replacement for the uncompleted K6, and should come online around year-end.

At the Chevron-operated Alba field, the A71 production well was drilled last month and should start up later in the year.


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