Nice pics.
I don't know how to figure out which airfield it was, but it can be narrowed down. By the images, it had a concrete tarmac so I would guess also concrete runways so you can rule out the airfields with just dirt runways. Also since it had B-17's, you can rule out some of the small municipal fields where they did training.
Still, there were a great number of fields in Texas during WWII which will still make it difficult. There were even fields where British pilots did their training, like what is in Terrell, Texas. It is home to BFTS #3 (British Flight Training School)