PETROLEUM SYSTEM IN THE SUFYAN DEPRESSION OF MUGLAD BASIN IN SUDAN

The Muglad Basin in Sudan is located the eastern boundary of Central Africa Strike-slip Fault Zone,is a large Mesozoic petroliferous rift basin.The Sufyan Depression is located most north end in this basin.Lower Cretaceous Abu Gabra Formation is an effective hydrocarbon source rock.Favorable reservoir in this area is the Abu Gabra Formation channel sandbody in delta or fan delta.Upper Cretaceou Darfur Group is the region cap rock.The hydrocarbon trap types have fault antiCline,fault nose and fault block etc.The Sufyan Depression has two petroleum subsystems vertically,among which Abu Gabra Fm subsystem has favorable assemblage with self generating,collecting and sealing.While the other petroleum subsystem is composed of Abu Gabra Fm source rock,Bentiu Fm channel sandstone reservoir and Darfur Group shale seal.Both they are favorable for exploration.The Central structure belt of the Sufyan Depression is most favorable for exploration.