6506/11-6

General

Well 6506/11-6 was drilled on a structure on the northern segment of the Kristin Discovery, ca 5 km west of the southern part of the Smørbukk Discovery offshore Mid Norway. The main objective was to evaluate and appraise the hydrocarbon potential of the Middle Jurassic Garn and Ile Formations.

Operations and results

Appraisal well 6506/11-6 was spudded with the semi-submersible installation Deepsea Bergen on 24 February 1998 and drilled to TD at 5275 m in Early Jurassic sediments of the Åre Formation. The well was drilled with bentonite spud mud down to 1412 m, with Glydril mud from 1412 m to 2739 m, and with Versapro oil based mud from 2739 m to TD.

The well proved gas/condensate in the Garn and Ile Formations. Isolated shows were recorded on sidewall cores at 3563 m (Lysing Formation) and at 4517 m (Lange Formation), both in thin sandstone stringers. Shows were recorded from top of the Garn Formation sand reservoir at 4645 m to the top of the Upper Ror Formation at 4891 m (MWD depth, correspond to 4896 m loggers depth). Shows were also observed from 4952 to 4980 m (MWD depth) in the Tofte Formation, but these are probably a result of mud invasion. Ten conventional cores were cut in the interval 4652 m to 5125 m in the Middle to Early Jurassic, recovering a total of 297 m of core from the Garn, Not, Ile, Upper Ror, Tofte and Tilje Formations. Several runs with the Schlumberger MDT tool were performed. Pressure points and sampling were attempted in the Lysing and Lange sands, but with no success due to poor reservoir quality. Formation pressure measurements and fluid samples (gas and water) were collected in the Garn, Ile, Tofte and Tilje Formations. For the Åre Formation pressure measurements were achieved but no cores or fluid samples were taken.

The well was permanently abandoned on 22 August 1998 as a gas and condensate appraisal well on the Kristin Discovery.

Testing

Three tests were p