Sea with oil rig

Lundin Norway has encountered an oil column of around 6m in sandstone of Upper Jurassic age at the Johan Sverdrup appraisal well 16/5-4 in PL501, Norway.

Located at the south-western flank of the Johan Sverdrup discovery, the well was drilled 4km south-west of appraisal well 16/5-2S and 3km south-east of well 16/5-3 (PL502).

An oil-filled 6m gross reservoir section of sand with a high net-to-gross ratio was discovered at the well.

According to the company, the reservoir top was found according to prognosis and 16m above the probable oil water contact of 1,922m (Mean Sea Level) and its sequence is entirely of late Jurassic age resting on Triassic sediments.

The Swedish company drilled the well to a total depth of 2,075m below mean sea level into sediments, which were most likely Triassic sediments, and completed a comprehensive coring and logging programme.

"An oil-filled 6m gross reservoir section of sand with a high net-to-gross ratio was discovered at the well."

In order to monitor the reservoir pressure for a period of two to five years, a pressure gauge was installed in the hole.

Lundin Petroleum president and CEO Ashley Heppenstall said: "The major uncertainties associated with this appraisal well were the time-depth conversion to the top of the reservoir and the presence of reservoir."

The company used the semi-submersible drilling rig Bredford Dolphin to drill the well.

The rig will drill the well 16/3-7 at the south-eastern flank of the Johan Sverdrup discovery, which is also located in PL501.

Lundin Norway owns 40% interest in PL501, while the other partners include Statoil Petroleum with 40% interest and Maersk Oil Norway holding the remaining.


Image: Lundin drilled the Johan Sverdrup appraisal well 16/5-4 about four kilometres south-west of appraisal well 16/5-2S. Photo: courtesy of num_skyman / FreeDigitalPhotos.net.

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