NCS: Lille Prinsen gets more contourLocation of the Lille Prinsen discovery and appraisal well. Source: Equinor

NCS: Lille Prinsen gets more contour

Equinor finalised the drilling of appraisal wells 16/1-30 A and S, finding oil in the Middle to Upper Jurassic Viking Gp and Grid Fm. Prior to drilling, the size of the discovery was between 2.5 and 5.5 MSm3 of recoverable oil.

The two appraisal wells, Lille Prinsen Outer Wedge, were drilled in the vicinity of 16/1-29 S oil discovery, aiming to get a better delineation of the Lille Prinsen Main and Verdandi prospects and to determine the oil/water contact in the outer wedge to the south.

The Lille Prinsen Main well (2018) encountered gas and oil in injectites in the Eocene Grid Fm and oil in Zechstein carbonates and fractured basement. The Verdandi oil and gas discovery (2003) encountered gas in the Palaeocene Heimdal Fm and Eocene Grid Fm.

The 16/1-30 S well encountered an 18 m oil column in a 2 m moderate-quality sandstone layer in the Middle to Late Jurassic Viking Gp and a 12 m oil column in 1 m moderate-quality sandstone layer in the Grid Fm. The OWC was proven at 1919 m below the sea surface. The Heimdal Fm was not encountered in the well.

The objective of well 16/1-30 A was to examine the extent of the carbonate reservoir in the Late Permian Zechstein Gp, as well as to investigate the development of Triassic and Jurassic reservoirs.

The well encountered a 15 m oil column in the Middle to Late Jurassic Viking Gp in a 6 m poor to moderate sandstone layer. Oil was proven down to 1914 m below the sea surface. The Zechstein carbonate reservoir is not present.

Additional recoverable volumes in the outer wedge of Lille Prinsen Main are estimated between 0.2 to 1 MSm3 of recoverable oil.

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