RE: 3.5x better value for WN than UJO12 Aug 2020 14:57
Hi Uggy100. I can't disagree when you say "there have been lots of tests on the core samples taken from WN & Cadeby ...... but they don't know what the oil API is". It's really hard to give you a sensible answer as I don't have more info than most other PIs, so what I can add is only my speculation. However, Rathlin seem to have taken both a Cadeby core in the A-1well and a Kirkham Abbey core in the A-2 well, as far as I can see, and they've now had more than enough time by now to do a raft of tests. These would presumably have included the recovery and testing of any liquid hydrocarbons within the two cores, so they must presumably have some info about the oil and / or condensate in at least the A-2 well. Small amounts of liquids might possibly have been produced during the previous testing of A-2 but, if they have a sample of it, they haven't commented on it yet, so maybe there wasn't any, or maybe the sample was very small and / or contaminated in some way. Of course, Rathlin might still be unsure if it's black oil or a much lighter condensate even now because the test was terminated early . Significant amounts of either oil or condensate in WN would be great, of course. Rathlin also have the A-2 core from which presumably liquids could have been recovered, even if the well test samples weren't up to much. I'll try to turn to Biscathorpe now: Egdon and UJO's oil API estimate for the Dinantian seems to have been based mainly on oil shows seen in the drill cuttings but it was presumably assisted by the logs. The cuttings samples were later analysed in much more detail by the consultant company APT, who seem to have pulled something of a rabbit out of the hat. That's IMO of course. But to say they haven't found the reservoir yet isn't quite right. They didn't find the Westphalian Sandstone reservoir at Bisc-2, and it was very thin in Bisc-1, but there's a very decent oil column in the Dinantian, aka Carboniferous Limestone. This is not generally regarded as a fabulous reservoir in the East Midlands Basin but perhaps Biscathorpe is one of the few places where it might turn up trumps.