by pitbull » Fri 14 Sep 2007, 12:41:26
Yes, the figure of oil left in the ground is finite. However, reserves are based on what we discover in the ground, and what we assume is recoverable. A reserve isn't how much oil is in the ground at one location, it is generally how much oil is recoverable at that time using today's technology.A reserve may initally be labeled as 1 billion barrels, and have 300,000 pumped out of it. Then, a new technology comes along that allows them to recover an additional 500,000 barrels from that well, so the reserve would then be reported as 1.2 billion. These figures are made up, but thats the basic idea behind how reserves grow.
If memory serves me correct, reserves also grow for member countries of OPEC because they want to be able to produce more oil than currently allowed (quota), and their production is limited to a precentage of the amount of oil available in the ground. So, if their quota is 10% per year (I'm totally guessing here), and they have 100,000 barrels, Year one, they pump 10,000, year two they are limited to 9,000, year 3 8,100, and so on. However, they don't want to lose the $$ from decrease in production, so they may cook the books to show they have found more oil or that they can recover more. This is all speculation however.