ABERDEEN, UK – EnQuest has issued an update on its field extension programs in the UK North Sea.
At Magnus in the East Shetland basin, water handling capabilities have improved following reinstatement of a second de-aeration tower this month.
At the end of last year, the company estimated remaining 2C resources at around 50 MMboe, but it has also identified various drillable targets that could lift remaining mobile oil in place to 270 MMbbl. These, and a potentially large gas discovery made by former operator BP, could form the basis of a long-term, low-cost development program. EnQuest plans a new round of drilling on Magnus later this year.
At the Thistle field, the drilling team continues to abandon wells and the Dunlin bypass project is progressing with the first phase of subsea construction, including the new pipeline and structure installation, now completed.
Modifications continue on the Thistle, Northern Producer and Magnus platforms ahead of the final subsea tie-in phase. The new export route, replacing the old route via the defunct Dunlin A platform, should be operational this summer.
At Heather, well intervention work has offset lower production caused by restrictions on compressor operations while upgrades took place.
EnQuest is planning ahead for decommissioning of the Alma/Galia fields in the UK central North Sea, where there are underlying reservoir declines.
At Scolty/Crathes (a tieback to the Greater Kittiwake Area production complex), wax in the flowline continues to constrain production, but a replacement pipeline project is progressing with pipeline fabrication complete and installation under way.
Production efficiency at the Kraken heavy-oil field has risen following the resumption of a two-train operation in mid-March, averaging more than 33,000 b/d in April. Performance of the FPSO’s main power engines has improved, as have the power water pumps that supply the hydraulic submersible pumps.
All DC4 (drill center 4) wells are onstream. EnQuest expects Kraken to deliver average output of 30,000-35,000 b/d over the remainder of the year.
It is also reviewing a near-field development of around 100 MMbbl of stock tank oil initially in place at Kraken’s Western Flank, focusing initially on the Worcestershire Area and Pembroke Trend. Development could be through spare capacity in the existing subsea infrastructure.