Simmons has said that much of the debate [on KSA's peaking]  currently is "theological" ...

The curious thing about Simmons is that he bases his early-peak pessimistic case to a large extent on an analysis of data provided by the SPE (Society of Petroleum Engineers), whose expertise he greatly admires.

Yet the SPE apparently estimates KSA's capacity to be greater than do the Saudis themselves. This is because the SPE includes reserves attributable to enhanced oil recovery in its standards, but the KSA excludes such reserves. And that makes quite a big difference.

Some mishtake here shurely ...

The spe papers simmons reviewed are those written by aramco engineers describing their problems and solutions. I never noticed that he used any non-saudi data from the spe for his research.