Petrobras
has
already
found
a
400-metre
(1312-foot)
column
of
oil
in
the
prospect,
which
it
operates
on
behalf
of
Portugal's
Galp
Energia
SGPS
and
Brazil's
Barra
Energia
and
Queiroz
Galvao
Petroleo
e
Gas,
Reuters
reported.
The
size
of
the
column
led
Joao
Carlos
de
Luca,
chief
executive
of
Barra,
to
call
it
"one
of
the
most
significant
oil
discoveries"
in
the
country's
history.
Others
say
the
column
suggests
the
discovery
could
be
on
the
order
of
the
Lula-Cernambi
complex,
an
8.3
billion-barrel
area
found
in
2007
that
was
the
biggest
discovery
in
the…