offshore

Norwegian multinational oil and gas company Statoil Petroleum has completed the drilling of the 15/9-F-1 and 15/9-F-1 A wells, which are situated between the Sleipner West and Sleipner East fields, on the Volve field in the central North Sea.

The company has drilled the 15/9-1 and 15/9-1 A wells to vertical depths of 3,275 and 3,185m and total depths to 3,577 and 3,627m below sea level respectively.

Both wells are concluded in the Smith Bank formation in Triassic and the Sleipner formation in Middle Jurassic.

The wells are permanently plugged and abandoned and are drilled by Maersk Inspirer, while the water depth at the site is 91m.

The company intends to discover additional petroleum in Middle Jurassic reservoir rocks in the north-western part of the Volve field.

The well 15/9-F-1 encountered Smith Bank formation due to a fault in the rock, instead of more Hugin formation.

As a result, the company has decided to drill sidetrack well 15/9-F-1 A.

The well encountered Hugin formation with a reservoir thickness of about 47m, which is expected to be of worse quality than anticipated.

The Smith Bank and Hugin formation are aquiferous, which are classified as dry, accordingly.

Statoil had secured production licences 046 and 046 BS in the third licensing round in 1975.


Image: Well 15/9-1 and 15/9-1 A on Volve field in the central North Sea. Photo courtesy of Statoil Petroleum.

Nri