Structural Style and Prospect Evaluation of Fractured Basement, Bamboo Oil Field, Muglad Basin, Sudan

Abstract

Abstract The study area located in the Muglad Basin, southwest of Sudan, about 30 km. north of Heglig oilfield within Bamboo field. It is bounded approximately by (X- easting rang; 758843 – 765403 E, Y-northing rang; 1127488 – 1135168 N, UTM Coordinate System, Zoon 35). Sedimentary sequences of the Muglad rift basin consists of non-marine cyclic sequences of lacustrine and fluvial/alluvial facies of early Cretaceous to late Tertiary age directly rested upon the Precambrian basement. This study focusing on fractured basement relying on the previous studies, 3D seismic data, well log data and FMI analysis result of AG-1 well. The main purpose of the study is identify the structural style and qualitatively predict the presence of prospects and leads in the fractured basement over the study area. The integrations of the seismic and borehole logs data through utilized the seismic interoperation’s techniques by using geo-model (Petrel Geoscience software), wireline log interpretation using Interactive Petrophysics (IP) software and qualitatively prospects evaluation using the prospect risking and ranking evaluations technique, was carried out to defining the horizon interpretation of the structural basement and prospect evaluation. Available 3D seismic volume was interpreted for top basement correlated by well log data and came out with basement horizon, the identification of faults was not only based on their individual fault characters and time slice as a normal techniques, but also utilized advanced seismic structure attribute techniques such as Anti-tracking, variance cube, geo-feature mapping and 3D seismic visualization view to scan the distribution of faults throughout the 3D seismic. These techniques were carried out to facilitate and enhance the fault interpretation of the target zone, the result of produced map and petrophysical parameters which curried out from petrophysical analysis provide a qualitative evaluation of the fractured basement prospect in Bamboo main area.