Equinor Makes New Gas Discovery in Norwegian North Sea
Equinor ASA and its partners have discovered more natural gas in the Gudrun field on Norway’s side of the North Sea.
The discovery was made in wildcat wells 15/3-13 S and 15/3-13 A, the 13th and 14th exploration wells drilled under production license 025, the Norwegian Offshore Directorate said in a press release.
“Preliminary estimates place the size of the discovery between 0.1 and 1.2 million standard cubic meters (between 3.5 million and 42.5 million cubic feet) of recoverable oil equivalent in the intra-Draupne Formation, and between 0.4 and 1.3 million standard cubic meters (between 14.1 million and 46 million cubic feet) of recoverable oil equivalent in the Hugin Formation”, the Directorate reported.
“The licensees will assess the well results in light of other prospectivity in the area”.
Gudrun is already a producing field, put onstream 2014. Last year it produced 1.26 million cubic meters (44.5 million cubic feet) of oil, 980,000 cubic meters (34.6 million cubic feet) of gas and 110,000 cubic meters (3.9 million cubic feet) of natural gas liquids, according to information on government website Norskpetroleum.no.
Currently the central North Sea field has remaining reserves of 10.6 million cubic meters (374.3 million cubic feet) of oil equivalent, mostly oil, according to Norskpetroleum.no.
In the latest drilling campaign, conducted by Odfjell Drilling Ltd.’s Deepsea Stavanger rig, the primary aim was to prove petroleum in Late Jurassic reservoir rocks in the intra-Draupne Formation and Middle Jurassic reservoir rocks in the Hugin Formation.
“Well 15/3-13 S encountered thin oil-bearing sandstone layers in the intra-Draupne Formation”, the Directorate said. “The oil/water contact was not encountered. In the Hugin Formation, the well encountered a total of 92 meters [301.8 feet] of sandstone with poor reservoir properties.
“Gas was encountered in two intervals, with respective thicknesses of 8 and 7 meters [26.2 feet and 23 feet]. The gas/water contact was not encountered”.
The well was drilled to measured and vertical depths of 4,826 meters [15,833.3 feet] and 4740 meters [15,551.2 feet], respectively, below sea level.
Sidetrack 15/3-13 A, drilled to delineate the discovery, encountered oil in an 85-meter (278.9 feet) thick interval in the intra-Draupne Formation, 13 meters [42.7 feet] of which were intermittent sandstone layers with moderate quality. “The oil/water contact was proven 4328 meters [14,199.5 feet] below sea level”, the Directorate said.
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