Fossil fuels are a finite resource. It takes tens to hundreds of millions of years for organic matter (typically from biomass) to morph naturally into the energy-dense states that we know today as hydrocarbons: oil, gas and coal. At the rate at which we are extracting it from the ground, we will have depleted the reserve within...? Well, that’s exactly what is up for debate today…
In the 50’s, scientists had already realized that the cost of marginal extraction had all the reasons to climb to the sky as resources were getting depleted. The low-hanging fruits are cheap and easy to harvest (hit the Texas ground with a pick axe and the black gold will gush), but the small fruits high up in the tree may not be worth the effort. The moment in time when extraction becomes cost-prohibitive, oil production peaks, and decreases until it eventually stops entirely. The tip of oil production is referred to as Oil Peak.
Up to about 10 years ago, experts around the globe would have agreed that either the Peak had occurred already, or that it would certainly happen before 2020. In fact, the IEA considers that the peak for conventional extraction occurred in 2011. That was generally regarded as “bad news” for economic growth (an important growth resource becomes more and more scarce); but also as “good news” for environmentalists who were seeing this depletion of fossil resources as an opportunity to diversify our energy mix and develop truly sustainable energy solutions.
However, the story is not over. The Oil Peak theory relies on a set of very dynamic assumptions. One underlying assumption is that the cost for extraction will keep on increasing as oil fields are more and more difficult to reach and exploit. Under these conditions, if the market price for oil (and to some limited extent energy) remains at low levels, it will quickly become unattractive to explore and drill further and we reach the Peak relatively fast. In case the price of oil is high, there is room created for alternatives (such as renewables or hydrogen) to be developed, and the resource becomes less and less attractive; the price then drops until it reaches the cost of extraction and we meet the Peak again. However, what if the financial cost of extraction does not go up, but instead goes down? Then regardless of oil market price it still remains attractive for oil giants to keep exploring and exploiting further remote reserves, and the Peak is pushed back in time. That is exactly what is happening right now.
According to the IEA, the global conventional oil extraction already peaked in 2011, and since then, the daily production is only decreasing. However, fossil fuel production as a whole re-increased as unconventional fuel production has ballooned in the recent years.