If there is one thing that defines the 21st century, it is the end of oil. But not just oil. Over the coming decades, we face the prospect of terminal depletion of the world's major mineral energy reserves, with major ramifications for the future of industrial civilization.
A survey of about a hundred of the world's most respected petroleum geologists by the Association for the Study of Peak Oil found that the vast majority expected world oil production to peak between 2010 and 2020, and that "the "peak' is more likely to look like a bump on a long ridge than the classic bell-shaped curve."
As the late geoscientist M. King Hubbert first noted, "peak oil' occurs when world oil production reaches its maximum level at the point when half the world's reserves of cheap oil have been depleted, after which it becomes geophysically increasingly difficult to extract it. This means that passed the half-way point, world production can never reach its maximum level again, and thus continuously declines until reserves are depleted. Using his model, Hubbert successfully predicted, to the shock of detractors, the peak of US oil production in the 1970s, after which the US became a net importer.
Unfortunately, the data suggests that world oil production has either already peaked, or is very close to peaking and that we may well now inhabit a post-peak world. Until 2004, world oil production had risen continuously but thereafter underwent a plateau all the way through to 2008. Then from July to August 2008, world oil production fell by almost one million barrels per day. It is still falling. According to BP's Statistical Review of World Energy 2010 which as usual assures us that world oil production will not peak for another 40 years in 2009 world oil production was 2.6 percent below that in 2008 (falling 2 million barrels per day), and is now below 2004 levels indicative of a gradually accelerating decline rate.
2004 80371 thousand barrels per day
BP's own data contradicts its professed optimism. This plateau in world production over half a decade is unprecedented, and suggests we have already started on the "long ridge" whose overall trajectory despite fluctuation will be inexorably downwards. The outlook is likely to be worse, given that according to a new peer-reviewed study by the UK government's former chief scientific adviser Sir David King in the journal Energy Policy (38, 8, 08/10), official estimates of world total oil reserves (including conventional, deepwater and unconventional resources) should be downgraded from 1,150-1,350bn barrels to between 850-900bn barrels. This corroborates the International Energy Agency's (IEA) admission in its World Energy Outlook 2009 that the apparent doubling of world reserves since 1980 were politically-motivated, coming largely from upward revisions by OPEC countries "driven by negotiations at that time over production quotas and have little to do with the discovery of new reserves or physical appraisal work on discovered fields."
Reserve size by itself matters only insofar as it practically translates into actual annual oil flows and rates of production. The problem, as noted by Matt Mushalik presenting the findings of former BP oil analyst Chris Skrebowski is that "almost half of the current global oil production (45%) comes from a very narrow reserve base of just 190 Gb or around 1/5th of the remaining reserves. It is depleting rapidly at a rate of around 7 % pa., with annual production declining consistently since 2002." Remaining reserves contribute to "little over half the global annual flows" and "at much lower production rates", most likely because they "are not able to increase production."
Dallas petroleum geologist Jeffrey J. Brown's Export Land Model projects a maximum of nine years between the time an oil-producer peaks and the reduction of its oil exports to zero. No wonder then that various experts warn we could see an actual oil supply crunch between 2012 and 2015, after which prices would rise inexorably as supplies drop and demand rises fuelled by industrial and population growth in emerging markets like China and India.
Unfortunately, oil is not the only problem. Unconventional oil, coal, and natural gas may well be unable to compensate for the shortfall.
For the first time, in 2005 ExxonMobil's own world oil production forecast showed no contribution from "oil shale' even by 2030. Similarly, the Hydrocarbon Depletion Study Group at Uppsala University in Sweden investigated the viability of a crash programme for the Canadian tar sands industry between 2006 and 2018, and up to 2050. It concluded that even adopting "a very optimistic scenario Canada's oil sands will not prevent Peak Oil." Another study commissioned by the investor coalition Ceres warns that production costs, market instability, and low energy return on investment (EROI) of less than a third of conventional oil's EROI, are endangering the viability of investments in unconventional oil.
Of course, the Gulf oil spill has put to rest previously widespread (but misplaced) optimism about the potential of deepwater reserves, due to the moratorium on future deepwater exploration. In any case, even before the disaster, the data points to a "sharply slowing and then flattening deepwater growth profile" by 2011, amidst acceleration in "the pace of deepwater decline." As Bob MacKnight, analyst at the Washington-based PFC Energy, thus concludes, "We are really approaching a peak production in deep water" and new discoveries will only "shallow the decline rather than move the peak."
The situation looks similar for the future of natural gas production. The interplay between prices and technological breakthroughs may permit deeper drilling of unconventional gas reserves for a longer period 118 years at "current demand" according to one optimistic projection. But estimates of world demand project a massive 49 percent increase up to 2035 fueled particularly by China and India. According to former Total geologist Jean Laherrere, who has conducted one of the most comprehensive surveys of the available conventional and unconventional gas reserve and production data, global natural gas production will peak around 2025 cohering with Canadian geologist David Hughes' projection of peak gas arriving in 2027.
As for coal supplies, an extensive study by the Energy Watch Group (EGW) warns that global coal production is likely to peak around 2025, at 30 percent above 2007 levels of production. US coal production in terms of energy will only remain at current levels for another 1015 years. However, just this year the journal Science published a study predicting that world coal production from existing reserves could peak as early as 2011, and that it is "unlikely" future discoveries would ameliorate the decline.
In a separate study, EGW warned that world production of uranium for nuclear energy would peak between 2030 and 2035. This corroborates the International Atomic Energy Agency's (IAEA) 2001 projections for uranium production up to 2050 that "presently known [uranium] resources fall short of demand" and that "future exploration will be more difficult"; as well as industry warnings, such as that in 2005 by Cameco the world's largest uranium producer to the effect that global demand will "outpace existing supply over the next decade by more than 400 million pounds."
Although thorium has been advocated as a potential "magic bullet' due to wide availability and potentially higher EROI, according to the Institute for Energy and Environmental Research in Washington DC thorium still requires uranium to "kick-start" a nuclear chain reaction. Additionally, despite decades of research, no one has yet developed a commercially-viable thorium breeder fuel cycle, not even in India. The other problem is simply that the mining, transporting, refining, milling, waste reprocessing and construction processes of nuclear power are still heavily dependent on fossil fuels. Indeed, an extensive study published in the International Journal of Nuclear Governance, Economy and Ecology finds that nuclear power is simply not efficient enough to replace fossil fuels in any case, requiring nuclear production to increase by 10.5 per cent every year from 2010 to 2050 an "unsustainable prospect."
The cumulative implications are unequivocal: industrial civilization faces multiple, converging shortages in the supply of energy across the spectrum of traditional hydrocarbon-linked reserves. These shortages are all likely to converge within the first quarter of this century.