Petrobras
said
in
a
statement
published
online
on
Friday
that
it
has
not
been
officially
notified
of
the
request
from
the
ANP
to
make
additional
investments
at
its
Roncador
field,
Reuters
reported.
Roncador,
one
of
Brazil's
biggest
producing
fields
in
the
Campos
Basin,
is
among
the
older
fields
that
have
been
responsible
in
the
past
six
months
for
falling
petroleum
output
from
Petrobras,
which
provides
for
some
90%
of
Brazil's
oil
needs,
the
news
wire
said.
As
output
falls
at
established
fields,
the
oil
giant
has
focused
on
developing
more
promising
prospects
in…