The main objective of the 16/5-8S well was to prove oil in porous basement similar to what is found in the Rolvsnes oil discovery to the northwest and to verify pressure communication with the 16/1-12 (Rolvsnes) well.
The well encountered a potential oil column of about 20 m in fractured, weathered Precambrian basement rock, with poor reservoir quality.
The reservoir displays similar characteristics as found in Rolvsnes, but the two discoveries are not connected, as shown by the pressure data.
The preliminary gross resources from this well are estimated to be between 1 and 10 MMboe. However, there is clear upside potential in the larger Goddo area and surrounding prospective basement, according to Lundin.
Southeast of the small Goddo discovery, lies Equinor’s dry Klaff prospect, which was targeting weathered/fractured basement. The 16/5-7 well drilled about 110 m of basement rock, of which 77 m of weathered and fractured basement rock with poor to moderate reservoir properties. Traces of oil were encountered in the upper part of the basement.
According to Lundin, the forward appraisal and commercialization strategy for the Utsira High basement play will be based on evaluation of the production performance from the Rolvsnes extended well test where production is set to commence in mid-2021, as well as the information collected at Goddo and surrounding well data.
Two horizontal wells in the northern part of the Edvard Grieg field already have production contribution from basement, and the Tellus East discovery announced earlier this year has similar reservoir to Rolvsnes and Goddo and will be produced as part of a future Edvard Grieg infill program.