if you are referring to the rigs in the gulf, from what I'm hearing they are only shut down, the rigs haven't been impacted much because the storm only became very intense much closer to shore.
Like I noted, production isn't the concern, the shipping and especially the refining processes are what is concern to the markets.
No, I am referring to the onshore shale oil and gas production that is the major development of the last decade in precisely the region affected by Harvey.
http://www.searchanddiscovery.com/documents/2012/10429dennen/ndx_dennen.pdf
The linked document described both the geology and it's extent, but does not show anything about where the shale operations are taking place.
One of the larger plays in the area is the Eagle Ford described in this article:
Eagle Ford Shale Fuels Corpus Christi Boom
For context, there is abundant history with conventional vertical oil and gas platforms offshore in violent weather on a worldwide basis, and even more extensive experience with onshore wells. There is much less with shale operations because those are much newer and fewer of those have been located so close to ocean influences as has been the eagle Ford and others in the Gulf Coast.
The reason for the concern is that this production depends on injection of carefully controlled substances in order to control the hydraulic fracturing (called fracking) process.
This is the process that has been controversial because of groundwater pollution, earthquakes and other disturbances. Nobody has well documented evidence of what effects may result from this type of event. They might be inconsequential, they might be very destructive, nobody knows.
My relatives that live in the area may have been directly affected by these activities. Harvey presents yet another risk factor.
Sorry for being long winded. I hope this explains why I made the statements I did, whether or not one thinks the concerns as I stated them are justified.
