Appraisal well 16/3-8 S, on the Avaldsnes High in the eastern part of the Johan Sverdrup discovery, was drilled 4 km southeast of discovery well 16/2-6 and 3 km west of appraisal well 16/3-4. The purpose of the well was to investigate the thickness and quality of the late Jurassic Draupne sandstone reservoir as well as the Permian Zechstein carbonates.
The well encountered an oil-filled reservoir consisting of 13 m of late Jurassic Draupne sandstone with excellent reservoir quality and a very high net to gross ratio, Lundin said. A production test has been performed in this interval and flowed at a rate of 4,900 b/d of oil through a 52/64-in. choke.
The company said pressure data information has proven exceptional production properties and lateral extension over an extensive area of the Avaldsnes High location. The DST showed that some of the best reservoir quality is found in the central area of the Avaldsnes High with an exceptionally high permeability of 65 Darcy and no flow restrictions within 3-4 km radius of investigation.
This is the fifth well that has been production tested in PL501. The investigated area now covers a majority of the Avaldsnes High area.
The well 16/3-8 S also encountered 67 m of Zechstein carbonates with variable, but mostly tight reservoir quality with oil shows. The oil water contact is interpreted at 1,925 m below mean sea level with oil sampled at 1,924 m below MSL.
The well was drilled to a total vertical depth of 2,010 m below MSL into sediments of Permian age. A comprehensive coring and logging program has been successfully completed. A technical side-track, 16/3-8 S T2, was drilled to investigate petrophysical properties in the reservoir. Lundin said the data was successfully acquired and is being analyzed.
The well was drilled using the semisubmersible drilling rig Bredford Dolphin.
“The test results from this well are as good as anything previously encountered on the Norwegian Continental Shelf,” noted Lundin Pres. and Chief Executive Officer Ashley Heppenstall. “Prior to drilling this well there was a risk that the good quality Volgian reservoir thinned out or even disappeared on the Avaldsnes High area of the Johan Sverdrup field. This well has proven that this is certainly not the case and the Volgian reservoir is contiguous over this area.”
Lundin in November 2013 completed the 16/3-7 appraisal well in the southeastern part of PL501 (OGJ Online, Nov. 7, 2013). In 2012, the company reported the 16/2-16 appraisal well met its initial objectives and would subsequently be sidetracked westward (OGJ Online, Dec. 10, 2012).
Lundin Norway is operator in PL501 with 40% interest, with partners Statoil Petroleum AS 40% and Maersk Oil Norway AS 20%.