The well was drilled about 5 km west of the Gudrun field in the North Sea, and about 230 km west of Stavanger. The objective of the well was to prove petroleum in reservoir rocks in the intra-Draupne Formation from the Upper Jurassic.
Well 15/2-2 S encountered a 500 m thick oil column in the intra-Draupne Formation, consisting of multiple thin sandstone layers totalling 23 m with poor reservoir properties.
Oil samples were taken from two different sand layers with different pressure regimes. Oil shows were also registered throughout the entire interval in the Upper Jurassic.
Due to the limited thickness of the sandstone layers and uncertainty in their dispersion, the preliminary estimate of the size of the discovery is between 0.95 - 5.55 million standard cubic metres of recoverable oil equivalent. The licensees will evaluate the well result to define the volume potential in different reservoir zones, and will assess the discovery alongside other prospects in the production licence.
The well was not formation-tested, but data acquisition and sampling were undertaken. This is the first exploration well in production licence 817 . The licence was awarded in APA 2015.
Well 15/2-2 S was drilled to a vertical depth of 4723 m below sea level and was terminated in the Draupne Formation in the Upper Jurassic.
The water depth is 111 m. The well will now be permanently plugged and abandoned.
Well 15/2-2 S was drilled by the Deepsea Yantai drilling facility, which is now moving on to production licence 1148 in the North Sea, where Wellesley Petroleum AS is the operator.
Read the article online at: https://www.oilfieldtechnology.com/drilling-and-production/20042023/oil-discovery-near-the-gudrun-field-in-the-north-sea/