The Albian/Cenomanian reservoir is one of the two main reservoirs composing the petroleum system in the Komombo Basin. However, these reservoirs have not previously been
studied in detail. Therefore, a detailed study of the reservoirs is performed. Six boreholes,
three vertical seismic profiles and twenty 2D seismic lines are integrated in the Petrel
Schlumberger modeling software to build a 3D structural model for the Albian/Cenomanian
reservoir. This model represents a framework for the subsequent 3D facies and petrophysical
models of the studied reservoir. The interpretation of the created maps and 3D models
shows two normal fault directions: NW–SE and NE–SW, where the NW–SE direction is
dominant, creating a major half-graben system. Conventional well log analyses are performed for the available wells. The results are used in subsequent facies and petrophysical
modeling. The thickness of the Albian/Cenomanian reservoir ranges from about 137 to
411.5 m. Petrographic analyses were conducted on two cores retrieved from the Albian/
Cenomanian cycles covering the depth interval of 1323–1352 m in well AB-5. Most of the
samples consist of quartz arenite and feldspathic arenite. The 3D facies model of the
reservoir shows that the sandstone has a large probability distribution in the study area
compared to the shale and siltstone. The 3D petrophysical models imply that the Albian/
Cenomanian reservoir has good to very good reservoir quality. The main issue for the
reservoir is the high water saturation values. In contrast, the hydrocarbon saturation is
restricted to some parts of the basin.