How much does office location at MBB influence future specialization by industry?

So TL;DR, I got an MBB post MBA associate offer at one of the MBBs in a Texas office where all the partners except a few are Oil and Gas specialists and I'm worried I'll be pushed into specializing in that industry.

I recruited the office for the location more than the work, although I am interested in energy, I am afraid of specializing in it too soon in my career and then getting pigeon-holed into a certain industry forever. What I hope to do is explore different industries and obviously choose something I really enjoy, or just stay a generalist and transition out if consulting isn't for me. 

During recruiting of course all the people told me don't worry about it, you can work on anything, and I know that for example I'll never have the same TMT opportunities there as I would in SF for example, or Financial Services in NYC etc. but I'm still not sure what to believe. 

Obviously any MBB consulting offer is really tough to turn down especially in this economy so I'm probably taking it no matter what but was hoping someone would be able to tell me straight up how hard it would be to not get sucked into O&G if I decide to do something else. 

I suppose I could always try to  transfer in 2 years or so if it turns out I'm having trouble getting the work I want, I'll have to be a top performer though I'm sure.