A simple but important study by Luciano Celi shows what is the real energy return that oil companies manage to attain. Much smaller than you would have believed, in several cases it is today well below 10. Which means that renewable energies already produce a larger EROI than oil and gas. No more excuses for not switching to renewables as fast as possible!And we have to do it fast because, as Celi shows, we are on the edge of the Net Energy Cliff of fossil fuels.
Researchers involved in the energy sector know very well what the EROI (acronym of Energy Return on Investment) is and how frequently is cited in scientific publications, in spite of differences of definition among researchers.Well aware of the fact that I arrived last in the middle of a dispute that has engaged researchers for decades, I accepted the challenge and tried to understand, with Claudio Della Volpe, Luca Pardi, and Stefano Siboni, if there was a way to know something that is difficult know: the EROI of oil companies.
The method we have implemented is quite simple, even if with some useful simplification that we have discussed in details in our paper.
The denominator in the EROI value is the Energy Invested, while the numerator is the Energy Return (how much energy is gained with respect to the investment). Knowing the numerator it is quite simple (we are talking of oil companies) because this value corresponds to the production of a day (or of a year). The issue in different cases was knowing the value of energy cost of that production. It is difficult to know how much energy they use to produce what they produce in a year (or in a day), sitting at a desk without wandering the world knocking on the doors of companies. However… we have found an indirect way to have these data.
…click on the above link to read the rest of the article…