It could be Oława-Stanowice which is just north-west-ish of Oława, maybe 30km south-east of Wrocław.
Good guess, but it doesn't seem to be the same - the airfield I saw was more built up round it, and the runway seemed to be concrete (but in a bad state). It was definitely more or less in line with the runway in Wroclaw (the plane didn't really alter course at this point until landing)
That'd be interesting to see. Did you happen to get any aerial photos to share with us?
Exasperatingly, no :( I only realised when the plane was more or less over it, so too late to think about.
There are actually quite a few abandoned airfields in Poland - have a look here - ronaldv.nl/abandoned/airfields/PL/index.html