Ann: Alameda 1 Independent Resources Assessment (Alameda Res), page-111

"Before drilling the Alameda-1 well, the then N structure was separated from the next structure to the west - the Piedra prospect - by a faulted saddle (see Figure 2). Having now encountered oil in Alameda-1 over such a large interval the two features are now considered to be part of the same, larger, Alameda structure. McDaniel’s estimates for this Alameda reservoir are 2.3 billion barrels of oil originally in place (OOIP) and a Prospective Resource of 148 million barrels of oil - a 3-fold increase on the combined pre-drill assessment of Prospective Resource for the N and Piedra structures of 50 million barrels of oil".

@afawcett
Just rereading the report, McD talks about Piedra adding 50m BBLs additional to Alamedas 148m so a total of 198m bbls.

Yet when you look at the overall figure inc the upper thrust sheet, they go back to using 148m bbls plus the prev 119m giving 267m bbls total?

Shouldn't it be 267m + 50m = 317m bbls? (albeit at a lowly 6.4% recovery of overall total)