aggrivated,
Thanks for going a bit further to find the correct website. I'm always leery of following any links from a new member who only has 1 post. (Sorry, John Roberts. It usually ends up at some spam site.) Since aggrivated posted the correct link, it suddenly became interesting to me. So, I clicked there. I read the home page first and was intrigued enough to subsequently read all the pages.
The website is really just a store front for selling their $69 paper on "Depletion: A determination for the world's petroleum reserve." If they are like most store front sites, they're giving away 1/2 to 3/4 of the content for free in order to get customers interested enough to fork out the $69 for the full report (2013.) The order page was updated in December, 2015 and now shows the price for version 2 to be $28. (It disturbs me that they haven't bothered updating all their pages. It isn't that much work.)
From what I saw of their approach, they're looking at the amount of petroleum in the ground from the perspective of thermodynamic laws and price. An analogy for the model is that we always pick the low hanging fruit first. Once it is gone, we need to do more work to get the higher fruit. At some point, there is still fruit on the tree, but because it is more work to retrieve than it is worth, it essentially doesn't exist.
They are looking at the ETP, an acronym for Total Production Energy. (First time I'd seen this.) It is similar to EROEI, but they claim that they can determine it from 3 variables only. Here is a paragraph from their "overview" page that explains the basic concept of their methodology:
The smaller error results from a much more compact model than what is produced by the quantity approach. To be implemented, the quantity approach requires the evaluation of thousands of values; usually many of them are not precisely known. The energy approach (the ETP model,Total Production Energy) requires only three. The model is derived from the fundamental physical properties of petroleum, First and Second Law statements, and the cumulative production history of petroleum. To generate values the model requires the mass of crude removed over a period of time, the mass of water removed, and the temperature of the reservoir. Although somewhat complex from a mathematical perspective, it employs only one value of which we are not very certain; that is, petroleum's production history.
When they say "temperature of the reservoir," they are talking about the API (American Petroleum Institute) temperature. There is a strong negative correlation between API and BTUs contained in a unit of petroleum. A low temperature reservoir (light, sweet crude) has more energy per unit than a high temperature reservoir (heavy, sour crude.)
It takes a lot of energy to get the finished product to the end consumer. Because the easy to find oil gets exploited first, more and more energy is required going forward. (It is net energy that we consumers get.) At some point, the energy required to get the oil explored, drilled, pumped, transported, refined, delivered, and sold requires all the embedded energy. At that point, petroleum is no longer an energy source. It can still be used as an energy carrier by using other sources of energy (eg. windmills) to pump oil.
One outcome of their methods is the petroleum price curve (first graph) shown on this page: http://www.thehillsgroup.org/depletion2_022.htm.
The Maximum Consumer Price curve was also developed from the ETP model. It represents the maximum price that the end consumer can pay for petroleum. It is based on the observation that the price of a unit of petroleum can not exceed the value of the economic activity that the energy it supplies to the end consumer can generate.
The price curve has a sharp kink in it starting in 2012 when half the energy contained in oil was needed to produce the end product. From that point on, utility to the end consumer drops rapidly and the maximum price drops rapidly. Their calculations say that by 2020, the maximum consumer price will be $11.76 per barrel. That's down considerably from 2016's maximum consumer price of about $65. In 2013, when they wrote their report, the max price was about $95 per barrel. Is that why the price has plummeted or is it just a huge coincidence?
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I don't know that I buy their methodology, but it is an interesting take on the situation. What adds credence to their predictions is that oil prices have generally followed their predicted price. We'll know in the next few years if the economy can actually handle oil prices as high as they are now. This information will stay close to the front of my mind for a few years.
Nonetheless, information that doesn't influence a decision is just noise. For me, I'm not going to change any decisions as a result of being informed about this. If I had children who were considering future careers or about to make a big life changing decision, I'd buy the report and read it.
Their calculations necessarily work on averages. To be an average, half has to be more and half has to be less. As prices drop, the less efficient wells/reservoirs can't be operated profitably. They won't expand at these fields. At some point, they'll stop pumping because it isn't worth it. Fields that still have good EROEI can still be operated profitably, but we'll have much less petroleum available to drive the economy. The overall economy will suffer mightily.
Perhaps this is the real reason we invaded Iraq. They have large, higher than average EROEI petroleum reservoirs. Perhaps this is why Hillary is talking tough about Russia since they have military weaponry that can stop us from getting "our" oil out from under Iraq.
For those who think that Hubbert's peak is a bunch of BS … they may be right (for the wrong reason.) Hubbert thought we would transition to nuclear power as our main energy source before we ran out of oil. Without having a replacement energy source for petroleum, his curve may have been too optimistic.
Grover