Thought this would be about "
Peak Everything," given the title. We've had heaps of threads on rare earths.
Was thinking about this recently:
The Oil Drum: Europe | Goodbye Helium, Goodbye BrainscansHow much Helium is there?
The expected ultimate extractable amounts of Helium are estimated at 40,000 million Sm3 as of 1 January 2007 by the United States Geological Survey (Sm3 = standard cubic meters). Of this amount 93% is endowed in six countries, the United States, Algeria, Canada, China, Qatar and Russia. This ultimate extractable reserve base has been identified using an economic classification, not a geologic one. The reserve classification here includes currently economic, marginally economic and some of the identified currently subeconomic reserves. Of this ultimate extractable amount 7,030 million Sm3 has been classified as reserves that are extractable using existing technology under current economic conditions. However, for Canada, China and Qatar this data is not available which makes the actual figure likely to be much higher. The countries for which figures are available are the United States (3,500 million Sm3), Algeria (1,850 million Sm3) and Russia (1,680 million Sm3).
Since Helium is a by-product of natural gas production, and the discoveries of natural gas fields peaked in the ‘70s of the 20th century and have been on a declining trend ever since, it is unlikely that much more Helium reserves will be discovered. The earth’s endowment of Helium is therefore quite well known although the figures are not very precise. This is due to a lack of a universal methodology to measure Helium reserves. Whether these figure are on the upside or downside is unknown. For reasons of political nature, governments worldwide normally have a tendency to exaggerate reserve figures and as a result it is likely that the expected ultimate amount of Helium in reality is lower.
Goghgoner's mentioning a decline in propane production due to decreased extraction from conventional gas wells made me think of this, I wonder if UNG produces helium on the side. No use of the words "shale" or "unconventional" in the comments or article, though.