Transfer zone character and its relationship to hydrocarbon in Fula Sag,Sudan

Muglad Basin,southern Sudan,is a passive rift basin resulted from the extensional tectonics of the dextral shear stress field in the Central African Trans-current Slip Zone.Fula Sag of 5000km~2 is located in northeastern Muglad.Fula Transform Zone in the middle structural zone is formed during the first rifting phase in Early Cretaceous.During the second rifting phase in Late Cretaceous,faults reactive and the zone is finalized.During the third rifting phase in Paleogene,the tectonic framework of the zone isn't changed and only small accommodation faults are developed.The effect of the zone to hydrocarbon accumulation exists in the whole reservoir-forming process.The transfer zone may form structures or traps that are prone to hydrocarbon migration and accumulation.It controls the distribution of organism-rich sendiments or sandbodies by dividing the depositional area into isolated subsags.The dense faults in the zone provide channel for hydrocarbon migration and accumulation.