For the $5 a barrel, I got the same $2.76 per share as you did in your spreadsheet. See Post # 218547. The only additional step that I did was to also indicate what Total's purchase price equivalent would have to be in JDZ 1. Also I tried it with 14 billion barrels and got a share price of $18.91 (using $5 a barrel) again in that same post.
That tells me that our spreadsheet aren't far apart.
Midtier says look at the other blocks in the region, the OML's and such and do a composite. If anyone has the NSAI numbers (prior to drilling) on those blocks and the purchase prices of those blocks, I will gladly compute them in a spreadsheet to see how those price influence ERHC's holdings.
Krombacher - p.s. thanks BB and Degen for the encouragement.