The
Oslo-listed
explorer
said
it
held
42.45
million
in
proven
reserves
at
the
end
of
last
year,
down
from
47.34
million
at
the
end
of
2011.
While
some
reserves
moved
to
production
or
development,
the
bulk
of
the
drop
over
the
year
was
down
to
reserve
downgrades.
Proven
and
probable
reserves
also
fell
for
Det
Norske,
which
held
65.31
million
barrels
of
oil
equivalent
in
2P
reserves
at
year-end,
down
from
67.89
million
in
December
2011.
The
Oslo-listed
explorer
said
that
three
discoveries
included
in
its
reserves
last
year,
Skaugumsasen,
Tir
and
Bumblebee,…