RE: Tugs16 Sep 2022 11:17
Nomadic & Tony are partially correct.
The money men did influence the choice of well location which meant i3 drilled L2 before A3. They wanted to do it the other way around, and had they done so, I think they would have discovered oil and proven the western flank of Liberator. They would then have discovered Serenity as well and the share price would have rocketed.
The i3 geo team (mostly Mihai Butuc) did think L2 would hit oil though and it was supposed to be a safe bet. It was the highest relief sands mapped close to the original discovery well, but the difficulty with Liberator is that most of the eastern flank’s sands fluctuate just above and below the oil-water contact. They weren’t trying to find the edge of the field, they just got their seismic interpretation wrong - most of the previous seismic interpretations showed L2 being below the OWC, but they trusted a new version which ended up being wrong. A small difference in the depth of the sands meant a lot more than they hoped was below the OWC.
I still think the western flank of Liberator and the Minos High is full of oil, and I sincerely hope this is included in future drilling if the Serenity appraisal is successful.
With regards to Serenity, there is much more leeway for error on the seismics. At Liberator it was very fine margins but the sands are are at a higher relief at Serenity, meaning there is a thicker section above the oil/water contact. The i3 theory is that those sands thicken to the west, with a larger section above the OWC (they are suggesting 40ft at the appraisal location). Even if they are 20ft out, there should still be 20ft of sands above the OWC. The oil in place would be lower but it wouldn’t be a total failure.
That doesn’t make this appraisal well a guarantee - there are always unknowns when appraising an oil field, especially at an early stage, but it’s not the same issue they faced at Liberator.