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Vår Energi AS: successful appraisal well in the Goliat licence in the Barents Sea

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Oilfield Technology,


Vår Energi AS has together with license partner Equinor completed an appraisal in PL 229 in the Barents Sea through the successful drilling of the 7122/7-7 S Goliat West appraisal well. The appraisal well 7122/7-7 S is located about 2 km south of the Goliat FPSO and 80 km northwest of Hammerfest, in the southern Hammerfest Basin. The well was spud on 28th November in a water depth of 379 m with the West Hercules semi-submersible drilling rig. The Goliat West well was drilled in an untested fault compartment westward of the field to prove additional resources.

The target of the well was the Lower Jurassic/Upper Triassic reservoir sandstones of the Tubåen and Fruholmen formation in the Realgrunnen sub-group. The well was drilled to a vertical depth of 1240 m below sea level, and reached TD in the Upper Triassic Snadd Formation. Two levels of hydrocarbon bearing sandstones were encountered in the Realgrunnen sub-group at original pressure and hydraulically separated from each other. The accumulation is separated from the main Goliat Field.

The Tubåen Reservoir is about 10 m thick and has been encountered gas and oil bearing with excellent reservoir properties; the hydrocarbon column in the Tubaen Formation is estimated to range between 18 m to 60 m. The Lower Reservoir has been found oil-bearing and is composed of several sandstone layers with good reservoir properties and a minimum hydrocarbon column of 35 m. Extensive data collection and fluid sampling was carried out in all the targets. The well has been permanently plugged and abandoned.

Recoverable resources are estimated to be 0.7 – 2.2 million standard m3 oil equivalents (4.4 – 13.8 million boe). Total volumes in place are estimated to be between 2 and 7 million standard m3 (13 – 44 million boe).

Resource estimates for Goliat before the drilling of the well had already increased to 31.5 million standard m3 of oil equivalents (198 million boe), from 28.0 million standard m3 (176 million boe) at the time of the PDO. Goliat West will further increase the resource estimates on Goliat.

Read the article online at: https://www.oilfieldtechnology.com/drilling-and-production/03012019/vr-energi-as-successful-appraisal-well-in-the-goliat-licence-in-the-barents-sea/

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