I know it must be frustrating for Mexicans that when gringo's
talk about hurricane impacts on the gulf of mexico, they generally
are talking about the northern gulf coast.
There is production that is exported to the US from the oilfields offshore
Ciudad Carmen, and right now that infrastructure is in the bullseye for
a hit from Hurricane Dean. From the Oil Drum:
The Oil drum goes into great detail about what might happen,
the prevailing opinion seems to be not much, if Dean exits the
Yucatan as a Cat 1 or 2 moving 18 miles an hour and passes north
of the Cantarell field, then it won't affect much. The production will
just be stopped until all the offshore guys can get back on crew boats
and ride the choppy waters back out to the rigs and platforms.
In my opinion the worst case would be if the track shifts further south and bullseyes
the cantarell field as a cat 3. A lot of the older platforms build before
the bust in '86 could get knocked over as they seem to do in the
northern gulf coast. Since Cantarell production is already dropping
like a rock, this will only hurt mexico and keep the price of oil high.
update 22 Aug
It looks like the storm crossed the oilfields as a cat 1 moving pretty
quickly, so, probably nothing happened. For a weak storm to have a big
effect offshore it has to move slowly so that the wind has time to build
some big waves. (see hurricane juan, 1985 for an example)