The development and evolution of Muglud basin can be divided into three stages: (1)in the early Cretaceous

with the Africa-South America continent splitting

the first extension downchasm basin ocured; (2)in the late Cretaceous

with the original Atlantic Ocean formation

the second extension downchasm basin occurred; (3)in Kainozoic

with the regional subsidence

this basin evoluted into a sag basin. From the end of the late cretaceous

there were apparent movements

resulting in reverse structure. In the west-north basin

there were strik-slip movements along the great central African fracture. As a result

Tullus

Bagarra sub-basins were greatly reformed. The main structural styles of Muglud basin are half graben

half horst(or horst)

extension fault-block

rollover anticline

compression anticline and flower structure. Among them

rollover anticline

compression anticline and horst are the main area of hydrocarbon enrichment. In the early Cretaceous

the basin was filled with mudstone of half-abyss and abyss facies

which controlled the distribution of hydrocarbon rocks. As the sediment center continuously moved southwards

good thick upper Cretaceous mudstone deposited in the south area

and formed regional cap-rock of giant oil field.Therefore

good potential region for oil and gas exploration in Muglud basin is decided by the above factors.