In the coming weeks readers will increasingly see two rarely used phrases
in stories covering our dwindling worldwide oil inventories: "operational
minimum" and "tank bottoms." The phrases more or less signify the same
thing, though the former is more abstract and precise, while the latter is
more visual. They signify rapid depletion of existing oil inventories and
presage price spikes to come due to the loss of oil supplies from the
Persian Gulf because of Iran's closure of the Strait of Hormuz, the
maritime artery through which 20 percent of the world's oil previously
flowed.
Think of it this way: Let's say you are currently spending your entire
weekly salary for living expenses. Then, you suddenly have your salary cut
by 20 percent. Believing that the cut is temporary, you dip into your
savings account to make up for the loss of income. At the current rate of
withdrawal, your savings will last four months. As the weeks go by, your
savings account balance dwindles as you continue to live in the style to
which you were accustomed before the salary cut. Your boss tells you
(frequently!) that your full salary will soon be restored. So rather than
cut back on your expenses, you keep spending down your savings believing
that all will return to normal before you exhaust your bank account.
That's what is happening in the global economy which had about four
months of buffer stocks—essentially, an "oil savings account"—to draw from
at the beginning of March. We are getting closer and closer to using up
those savings which are in the form of commercial inventories. We
are rapidly drawing down those inventories to make up for the loss of oil
and oil products from the Persian Gulf.
In fact, a
recent analysis suggests that the world oil system will start to
experience "operational stress" sometime in June. Operational stress "is
the point at which the system begins to experience significant functional
strain: price volatility becomes extreme, rationing of refined products
begins in the most exposed markets, and the margin for error in supply
chain management drops to near zero." This analysis takes into account
ongoing strategic petroleum reserve releases around the globe and states
that "[e]ven full deployment of strategic reserves buys weeks, not months,
at current drawdown rates."