  A phase plot of the oil economy is built using the literature data of world
oil production, price, and EROEI (Energy Returned on Energy Invested). An
analogy between the oil economy and the Benard convection is proposed; some
methods of interpretation and forecast of the system behavior are also shown
based on "phase portrait" using as main variables the price, production and
EROEI values. A scenery is proposed on this basis.
