Lundin Norway has completed drilling of an appraisal well in North Sea’s Edvard Grieg oil field where the reserves were found out to be more than the estimated figure.

Initial calculations revealed that the results derived from the appraisal well 16/1-27 could potentially increase the estimated reserve of recoverable oil to anywhere between 1.6 to 4.8 million standard cubic metres (Sm3).

While further work is likely to bring in more clarity regarding the estimate, the results so far are said to be helpful for the final placement of production and water injection wells.

The Norwegian oil and gas company, which is the operator of production licence 338, drilled the appraisal well about three kilometers of the Edvard Grieg platform in the southwest direction.

The Edvard Grieg field was proven to have oil resource in 2007, comprising Cretaceous and Jurassic/Triassic reservoir rocks, as per the Norwegian Petroleum Directorate (NPD).

Lundin Norway had estimated the field to have 35 million standard cubic metres (Sm3) of recoverable oil equivalents prior to the drilling of the 16/1-27 well.

Drilling at the well was done with the aim to explore the scope of the oil field along with its total oil column and reservoir properties.

Part of the objective was to streamline the drainage strategy to enable ideal placement of development wells in the region.

A total oil column of 15m in Cretaceous and Triassic/Jurassic sandstone of very good reservoir quality were encountered by the operator during the 16/1-27 well drilling.

In total, the sandstone interval was recorded as 94m which was 38m more than the initial estimate made before the drilling.

According to NPD, the encountered oil/water contact was at at 1948m below the sea surface, which is nine metres deeper compared to the other part of the Edvard Grieg oil field .

The operator is said to be carrying out extensive data acquisition and sampling from the drilled well.

Image: Location of the appraisal well 16/1-27 in production licence 338. Photo: courtesy of Norwegian Petroleum Directorate.