by davep » Tue 09 Feb 2010, 04:18:21
$this->bbcode_second_pass_quote('shortonsense', '')$this->bbcode_second_pass_quote('davep', '
')So will you stop banging on about 6-7% global declines in production from existing fields being anything other than a very recent thing?

Absolutely not. You see, just because the methods used by ASPO and even industry do not meet your requirements of proof, they certainly meet mine.
I would consider revising this opinion if you can demonstrate personal experience using decline curve analysis, at either the field level or well level, which would discount this position?
Until then, I certainly understand why ASPO uses them, and what they mean, until these ideas are disproven by someone with relevant experience. Perhaps RocDoc could comment on how often rates of change in exponential decline need to be changed, once assumed?
Certainly such methods are completely useless if these wells and fields didn't follow a predictable path, and this predictability makes it completely reasonable, with no proof to the contrary, to backcast those exponential declines for SOME period of time. I am only backcasting 5 years. ASPO decided they are valid for much longer periods of time than that.
Jimmys comments simply solidify the opinion that as an area ages, as the US, it hits this 6-7% decline spot. If, in fact peak was 2005 as has been claimed by the Prophets, then so much the more need for those 2.25 Saudi Arabia's to reveal themselves!
What a strange post. It's not for me to show proof that there haven't been global declines in production from existing fields for a long time, but for you to prove that there have been. After all, you were the one making that assertion, and the related one of having found 2.25 Saudi Arabias extra capacity since 2005.
So, let's ignore the Carter thing (as that was merely the US, not global). Please back up your claim that we have been experiencing 7% production decline rates in production globally for existing fields since 2005.