30/6-29 S

General

Well 30/6-29 S is an exploration well that is reclassified from development well 30/6-C-8 DT2. The exploration target was the Alpha Nord Cook prospect underlying the northern part of the Oseberg reservoir. The primary objective was to determine presence of hydrocarbons in the Cook and Eiriksson formations. The secondary objective was to test presence of hydrocarbons in a sandstone which is believed to be re-deposited Brent sandstone on-lapping the Base Cretaceous Unconformity. An equivalent or similar sandstone is penetrated also in wells 30/6-16, 30/6-17 A, 30/6-17 R and in development well 30/6-C21 AT2.

Given a discovery, the well would produce the Alpha Nord Cook.

Operations and results

Wildcat well 30/6-29 S was kicked off on 6 January 2015 from a whipstock in the 9 5/8" liner at 3096 m in development well 30/6-C-8 C. It was drilled with Versatec oil based mud all through.

After drilling horizontally through the Shetland Group for about 2.3 km the well drilled into the secondary target sandstone sequence at 5360 m (2484.3 m TVD MSL). It was oil-bearing with an OWC at 5383.7 m (2498 m TVD MSL). A single pressure point taken in this sandstone indicated pressure depletion and communication with the Oseberg Brent reservoir. The primary target Cook Formation was encountered at 5534 m (2595.5 m TVD MSL). It was oil-bearing down to the OWC at 5562 m (2615.5 m TVD MSL), giving an oil column of 20 m. Pressure points showed an oil gradient with initial un-depleted pressure. The Eiriksson Formation was water bearing. No shows analysis is performed in the