oleocene.org

IEA : WORLD ENERGY OUTLOOK 2008
Chapter 10
Field by field analisys of production
Is decline accelerating ?


Special Release: Field-by-Field Analysis of Oil Production (WEO 2008)
10 November 2009
With respect to recent discussion about oil decline rates, we are exceptionally making available the respective chapter of last year's WEO 2008.

In order to derive an indicative estimate of the overall decline rate for all the world's oilfields, we have assumed that the average rate for the fields not included in our database is the same as that for the large fields (which averages 10.4% worldwide). This is a somewhat optimistic assumption, as the differences in decline rates between the three categories of fields we assess here suggests that smaller fields are likeky to have higher decline rates than large fields. On this basis, we estimate that the average observed decline rate worldwide is 6.7%. Were that rate to be applied to 2007 crude oil production, the annual loss of output would be 4.7 mb/d.

energy_isere a écrit : .....http://www.worldenergyoutlook.org/docs/ ... pter10.pdf
pdf de 29 pages extrait du gros WORLD ENERGY OUTLOOK 2008.
.....

SuperCarotte a écrit :Comprends pas, page 2 justement ils parlent bien de 6.7% de déclin mais pour les "post-peak fields" uniquement .
C'est moi ou ça n'a aucun sens d'appliquer ce taux de déclin à la production de brut entiere (qui regroupe des champs qui ont passé leur pic, mais aussi d'autres qui n'ont pas passé leur pic) ?

SuperCarotte a écrit :

In order to derive an indicative estimate of the overall decline rate for all the world's oilfields, we have assumed that the average rate for the fields not included in our database is the same as that for the large fields (which averages 10.4% worldwide). This is a somewhat optimistic assumption, as the differences in decline rates between the three categories of fields we assess here suggests that smaller fields are likeky to have higher decline rates than large fields. On this basis, we estimate that the average observed decline rate worldwide is 6.7%. Were that rate to be applied to 2007 crude oil production, the annual loss of output would be 4.7 mb/d.

(page 24)

La production a remplacer chaque année serait donc plus proche des 5 mb/d que des 4 mb/d.

Forbes says Brazil's Tupi 8th biggest oilfield worldwide

(ADPnews) - Jan 22, 2010 - The Tupi field in Brazil's Santos Basin is the eighth biggest oil exploration field in the world, with its reserves of some eight billion barrels, a study of the Forbes magazine showed today.
Tupi is a revolutionary discovery for Brazil. It was the first of several of big finds, that include the fields Jupiter and Carioca, which have made the country one of most attractive locations for oil and gas extraction, the US magazine also said.

***

Table of the world's biggest oilfields:

Name..............................Country..................Reserves (in billion barrels)

Khuzestan.........................Iran................................100
Ghawar........................Saudi Arabia...........................30
Khurais........................Saudi Arabia...........................27
West Qurna......................Iraq..................................21
Rumaila.........................,..Iraq..................................17
Carabobo......................Venezuela.............................15
Majnoon............................Iraq.................................13
Tupi..................................Brazil................................8
Kashagan........................Kazakhstan...........................8