Which audit co. has Oil companies clients?

[decentshaw]

I want to know which audit firms/ companies have Oil companies clinets ?
E.g
- PSO
- SHELL
- BYCO
- PPL
- POL
- OGDC
etc
Also Do LAHORE office involves in auditing of these oil producing/marketing companies? Which city office mostly involve in audit of these companies?
Thanks in advance

[arsenal.gooner]

ogdcl is with deloitte. PSO is a joint audit of i think EY and another firm. Shell, being an MNC, i assume would be with aff

[decentshaw]

Thank you

[akr124]

shell(aff )
bp(aff)
attock petroleum(aff)
pakistan oilfields(aff)
pso(deloitte)
ogdcl(deloitte)
ssgc(deloitte)(gas company)
sngpl(aff & deloitte)
ppl(ey)

[YNWA]

POL is with AFF
MOL,OMV, infact most of the oil clients are with EnY
Though AFF has whole of ATTOCK group and NRL,POL