The Fault System of Fula Sag, Muglad Basin and Its Hydrocarbon Control

The Muglad basin is a continental rift basin during the Mesozoic-Cenozoic on the southern Central Africa Shear Zone (CASZ). The Fula sag is a hydrocarbon-rich depression in the north of Muglad basin. With the improvement of exploration degree, Fula sag has been in the stage of fine exploration for complex fault blocks. Therefore, strengthening the study of fault characteristics and evolution will help in deepening the understanding of the hydrocarbon accumulation rules in this area and guiding the next step of oil and gas exploration. Taking Fula sag as an example, the characteristics, evolution of faults, and their controlling effects on hydrocarbon in the study area were analyzed. Conclusions are listed as followed. We have obtained innovative knowledge as followed: faults in the study area can be divided into three levels and five combination features; continuously active faults control the formation of “inherited” sag; faults in Fula sag have a controlling role in the development of hydrocarbon source rocks and central reservoir assemblages in the AG Formation. The research results have been applied in exploration deployment.