Yep, must be and looks like F-7s. (F-7 is export designation for J-7). The other white ones must be the F-5/FT-5. The two with the straight wings look more like dumped Jet Provosts... where's RecceJet when you need him.
To the south of that position might be the remains of two A-5s. To the West are the remains of some prop transports and helicopter, can't make out type? To the north, 4x MiG-23s, F-5, F-7 and two MiG-29. Surely, those hangars contain more interesting things. And some more trainers are scattered around... don't appear to be K-8s though.
K-8 doing combat... I suppose you have to look West and then North for that, look out for either Su-25 or Hinds and see what else you spot. If some are doing combat, they won't be sitting at Khartoum.
But the K-8s are comparatively new, they'll be sitting in the hangars if these sat photos are actually from after their time of delivery... you won't find them dumped at the end of the base like those F-7/F-5s.
Also prior to Darfur, there was war in the south, probably some Hind, A-5 remains there. I say remains because they shouldn't be operating there... if you find them there in fine condition, then the sat photo is way old.