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How much oil remains for the world to produce? Comparing assessment methods, and separating fact from fiction
How much oil remains for the world to produce? Comparing assessment methods, and separating fact from fiction
Abstract
This paper assesses how much oil remains to be produced, and whether this poses a significant constraint to global development. We describe the different categories of oil and related liquid fuels, and show that public-domain by-country and global proved (1P) oil reserves data, such as from the EIA or BP Statistical Review, are very misleading and should not be used. Better data are oil consultancy proved-plus-probable (2P) reserves. These data are generally backdated, i.e. with later changes in a field’s estimated volume being attributed to the date of field discovery. Even some of these data, we suggest, need reduction by some 300 Gb for probable overstatement of Middle East OPEC reserves, and likewise by 100 Gb for overstatement of FSU reserves. The statistic that best assesses ‘how much oil is left to produce’ is a region’s estimated ultimately recoverable resource (URR) for each of its various categories of oil, from which production to-date needs to be subtracted. We use Hubbert linearization to estimate the global URR for four aggregate classes of oil, and show that these range from 2500 Gb for conventional oil to 5000 Gb for ‘all-liquids’. Subtracting oil produced to-date gives estimates of global reserves of conventional oil at about half the EIA estimate. We then use our estimated URR values, combined with the observation that oil production in a region usually reaches one or more maxima when roughly half its URR has been produced, to forecast the expected dates of global resource-limited production maxima of these classes of oil. These dates range from 2019 (i.e., already past) for conventional oil to around 2040 for ‘all-liquids’. These oil production maxima are likely to have significant economic, political and sustainability consequences…
How much oil remains for the world to produce? Comparing assessment methods, and separating fact from fiction
How much oil remains for the world to produce? Comparing assessment methods, and separating fact from fiction
Abstract
This paper assesses how much oil remains to be produced, and whether this poses a significant constraint to global development. We describe the different categories of oil and related liquid fuels, and show that public-domain by-country and global proved (1P) oil reserves data, such as from the EIA or BP Statistical Review, are very misleading and should not be used. Better data are oil consultancy proved-plus-probable (2P) reserves. These data are generally backdated, i.e. with later changes in a field’s estimated volume being attributed to the date of field discovery. Even some of these data, we suggest, need reduction by some 300 Gb for probable overstatement of Middle East OPEC reserves, and likewise by 100 Gb for overstatement of FSU reserves. The statistic that best assesses ‘how much oil is left to produce’ is a region’s estimated ultimately recoverable resource (URR) for each of its various categories of oil, from which production to-date needs to be subtracted. We use Hubbert linearization to estimate the global URR for four aggregate classes of oil, and show that these range from 2500 Gb for conventional oil to 5000 Gb for ‘all-liquids’. Subtracting oil produced to-date gives estimates of global reserves of conventional oil at about half the EIA estimate. We then use our estimated URR values, combined with the observation that oil production in a region usually reaches one or more maxima when roughly half its URR has been produced, to forecast the expected dates of global resource-limited production maxima of these classes of oil. These dates range from 2019 (i.e., already past) for conventional oil to around 2040 for ‘all-liquids’. These oil production maxima are likely to have significant economic, political and sustainability consequences…
…click on the above link to read the rest of the article…
An Updated Version of the “Peak Oil” Story
An Updated Version of the “Peak Oil” Story
Our analysis of the discovery and production of oil fields around the world suggests that within the next decade, the supply of conventional oil will be unable to keep up with demand.
There is no single definition for conventional oil. According to one view, conventional oil is oil that can be extracted by conventional methods. Another holds it to be oil that can be extracted inexpensively. Other authors list specific types of oil that require specialized techniques, such as very heavy oil and oil from shale formations, that are considered unconventional.
Figure 1 shows the growth in unconventional oil supply for three parts of the world:
- Oil from shale formations in the US.
- Oil from the Oil Sands in Canada.
- Oil characterized as unconventional in China, in a recent academic paper of which I was a co-author. (Temporarily available for free here.)
Oil prices in 1998, which is when the above quote was written, were very low, averaging $12.72 per barrel in money of the day–equivalent to $18.49 per barrel in 2015 dollars. From the view of the authors, even today’s oil prices in the low $40s per barrel would be quite high. Since the above chart shows only yearly average prices, it doesn’t really show how high prices rose in 2008, or how low they fell that same year. But even when oil prices fell very low in December 2008, they remained well above $18.49 per barrel.
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