Gail,

Pardon my layman's approach to math.

Knowing that they fudged the figures around circa 87 we could make an assumption that they were half honest before then. So adjust the OPEC graph down between 80 and 88 to make that slope fairly linear. That may give some sort of "scenario modelling" figure to plug into world reserve model. Indeed you could use "rule of thumb" adjustments to all suspected dishonesties in the system. This may produce a fairly accurate picture of reality.

If they use the same technology to extract oil then we could adjust their reserves down to a level that puts everyone in the similar reserves/production ration. If the two adjusted figures are in the right "ballpark" region we have probably got a useable set of unfudged numbers.

Just a thought, (looking at all those pretty colours does funny things to my head)

The main problem I see is 1980 does not go far enough back. I'd like to see production from the ME before it was nationalized.

We actually have the data in general production declined from the 1970's but its not a lot lower than when the same companies that are producing at the higher rates in North America etc where in control. In short nothing much changed except reserve estimates.

The 1950-1980 production data is in my opinion important for the thesis of this paper since it includes nationalization of resources.

BP gives production back to 1965, but reserve history only to 1980. EIA International Petroleum Monthly shows production back to 1970 - no reserves.

Simmons sheds a lot of light on this pre-bogus/post-bogus ME reserve change from when Aramco was run by the American oil companies in the 70s to the Saudi nationalized version of the '80s. There was a U.S. Congressional hearing in 1979 as a follow up to their 1974 hearings into overproduction damage to the Saudi fields in dealing with the demand surge of that time. They found that the problems of '74 had gotten worse. They didn't want to publicize these unsettling developments, so they muffled it from "hearings" to " A Staff Report to the Senate Subcommittee". As Simmons noted:

"The staff report did not hide, however, the huge reduction in the outlook for Saudi Arabia's maximum sustainable oil production. Gone were the confident expectations of the early 1970s that Aramco's oil output could rise to 20 or 25 million barrels a day. Gone too was a revised downward estimate that a plateau of 16 million barrels a day could be sustained for years. By late 1978, the realists at Aramco were predicting that even a rate of 12 million barrels a day begun in 1985 would lead to declining production by 2000 to 2005." Twilight in the Desert, p 383 App. C

This was in 1979 that these American Aramco personel were making this bold projection. It was based on 110 billion barrels of realistically producible reserves. And the report stated it wasn't likely that large new reserves would be found, which has been the case per Simmons. I somehow get the feeling they were a little more honest and/or knowledgable than their subsequent Saudi counterparts. The production curve has followed the 1979 projection closely despite the reserves being doubled, tripled, and what not.

Think of it. Hubbert's model had just been proven correct in predicting the U.S. peak when this government investigation spanning '74 and '79 came to the same conclusion as Hubbert on an approaching global oil production peak. So what does our government, whom we hire to look out for our well being, do with this information? Well, they hid it of course. They put it under lock and key lest we might get prepared. Honest to God, that's what they did!

"The notion that Saudi Arabian oil reserves could be produced at 10, 12, or 15 million barrels a day for 50 or more years was utterly dismissed by the subpoenaed papers that formed the basis of this staff report. What a misfortune it was that this report received no media coverage and these key papers were locked away from public view for next 25 years - years during which the entire world grew more and more convinced that Middle East oilfields were so prolific they could be produced at virtually any rate through the first quarter of the twenty-first century."

The supporting documents for this report were deemed "sensitive" and put under seal for another 50 years. Yet another brilliant energy policy coup by our wise men in Washington.

Thanks for posting this! Now that you mention this, I remember reading about this in Twilight in the Desert.

Saudi Arabia has produced about 81 Gb between 1979 and now. If it has 110 Gb in reserves than, just a subtraction would bring 29 Gb of remaining reserves. There have probably been some discoveries, plus some reserve growth, given the conservative reserves of the 1970s. Ace's reserve range of 60 to 100 Gb from his post a few days ago would seem a lot more reasonable than the published reserve of 264.3 Gb.

I second that idea..

Lucifer,

It does seem like one could work backward from production to get an estimate of reserves. For countries with easy-to-extract oil, it would seem like might expect to extract at least 4% to 5% out each year. If countries can't, you start wondering about the accuracy of the reserves.

-->