De or het offshoreoliewinning?

The correct Dutch article is:

de offshoreoliewinning

Rule Words ending in -ing: almost always de. See the rule

How to use offshoreoliewinning

the offshoreoliewinningde offshoreoliewinning
this offshoreoliewinningdeze offshoreoliewinning
that offshoreoliewinningdie offshoreoliewinning
our offshoreoliewinningonze offshoreoliewinning
your offshoreoliewinningjouw offshoreoliewinning
every offshoreoliewinningelke offshoreoliewinning
which offshoreoliewinning?welke offshoreoliewinning?
a big offshoreoliewinning / the big offshoreoliewinningeen grote offshoreoliewinning, de grote offshoreoliewinning