Darfur Gr

Reference: Jingyao, 2015; Dou et al., 2023

[Fig. 1: Western and Central African rift system. West African rift subsystem and Central African]

[Fig. 2: General stratigraphic column - Muglad Basin, Sudan, showing three geological cycles – Neocomian to Barremian, Aptian to Maastrichtian, and Paleocene to Pliocene - Miocene, or Quaternary and Petroleum Systems (from Ahmed and Ozumba, 2017)]

[Fig. 3: Comprehensive stratigraphic columns in the Muglad Basin (from Dou et al., 2023)]

[Fig. 4: Regional stratigraphy of the Muglad basin, SW Sudan (after Schull 1988; Dou Lirong et al. 2013 – extracted from Makeen et al., 2013)]

[Fig. 5: Location map of the Fula sub-basin in the Muglad basin including oilfields (study area) (after Dou Lirong et al. 2013 – extracted from Makeen et al., 2013)]

Babikir (1997): "In the Abu Gabra No. 1 well the Darfur Group is a thin claystone dominated sequence. In the Unity and Heglig areas the Darfur Group is more fully developed where it can be separated into four units: the Aradeiba, Zarga, Gahazal and Baraka formations. However, it is not possible to distinguish these units in the Abu Gabra No. I well. Here this group consist primarily of claystones, often silty and grading to argillaceous non-calcareous siltstones, which vary in colour from medium to light grey and brown. Thin intervals of sand also occur; these are usually colourless or light grey and of variable grain size. Trace amounts of pyrite and chlorite are seen throughout the interval."