RE: Serenity26 Sep 2019 13:24
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If we measure across using the scale on Fig.6 (crude but in the ballpark), then we see that the first c.6km of Serenity were actually in Dana's block. That still leaves the juiciest 4km section under Talisman control prior to 2009, with 3km in the relinquished section and 1km inside Tain.
However, if it is indeed true that Talisman did not re-process seismic for that area, which given that Dana did, looks indeed possible, then they would never have known that Serenity was there or indeed that it was connected to Tain.
This is further supported by the drills on Tain. Fig.3 shows 2 well sites on Tain, the original discovery 13/23b-5 and a further 2008 drill 13/23b-6. Both sit right on the Blake 3D (purple) and the peach Dana 3d seismic from 2010.
The other 2 drills conducted by Talisman on Tain, 13/23b-Y and Z, were both sidetracks drilled from the original drill location in on that purple/peach border and completed in 2005. So although Talisman drilled into the surrounding area and indeed very close to Tain, they may well have accomplished this through localised data rather than 3D seismic, and certainly did not have the seismic from Dana, which came 5 years later.
If they had processed more seismic first then they may well have found Serenity and kept the section of the block they instead went on to relinquish in 2009.
So what about Dana?
Well thus far I have found out that Dana acquired Block 13/23a as part of its $240m acquisition of Bow Valley, who at that time were struggling with debt issues. In obtaining the Bow Valley assets, Dana acquired 4 producing blocks in the North Sea and circa 7,800 bopd production (see below).
https://www.theglobeandmail.com/report-on-business/dana-to-buy-bow-valley-for-240-million/article22510579/
As part of the deal Dana as is normal, picked up other blocks with minimum commitments on them. One of these was Block 13/23a (I3E Block 13/23c)
Page 5 of the Dana report states ;
"The Licence commitment was to re-process 200Km2 of 3D Seismic Data and then to either drill one well to 3000m or into the Ettrick B Sands, whichever is shallower, on the Minos Prospect."
Page 6 then goes on to explain that this commitment was scaled back to 162km of re-processing (another indicator of Danas's approach to the Block).
In addition, Dana dumped the Minos prospect, which was favoured by Bow Valley and instead drilled Magnolia, which is next to Serenity but separated by the fault. The prospect was spud in Feb 2013 and would be the only drill that Dana would have on the block before surrendering it in early 2016.