RE: cement job
the casing is cemented in by the drilling rig - these pictures are a service rig.
you can still perforate both zones - you keep them isolated with a plug - either retrivable or permanent. after you confirm certain things like pressure, oil quality you can apply to produce them commingled - or if not, you can always complete as a dual well - zones isolated from each other by a packer and separate production strings run for each- not the best way but can be done.