  The behavior of complex systems is one of the most intriguing phenomena
investigated by recent science; natural and artificial systems offer a wide
opportunity for this kind of analysis. The energy conversion is both a process
based on important physical laws and one of the most important economic
sectors; the interaction between these two aspects of energy production
suggests the possibility to apply some of the approaches of the dynamic
systems' analysis. In particular, a phase plot, which is one of the methods to
detect a correlation between quantities in a complex system, provides a good
way to establish qualitative analogies between the ecological systems and the
economic ones and may shed light on the processes governing the evolution of
the system. The aim of this paper is to highlight the analogies between some
peculiar characteristics of the oil production vs. price and show in which way
such characteristics are similar to some behavioral mechanisms found in Nature.
