Developing a Coherent Stratigraphic Scheme of the Albertine Graben, East Africa

Depositional Structures, Tectonic and Stratigraphic Units and Their Effect on The Reservoir Rock Units of South Lake Albert Basin, Albertine Rift, Uganda.

“…From the previous studies, SLAB encountered low to moderate porosity, permeability and high volume of shale i.e., poor reservoir parameters that were attributed to limited understanding of depositional structures, tectonic and stratigraphic units, [12,13,15]. This study realized that the different wells were drilled within different compartments, and Kaiso Tonya area has a major fault that makes a terrace towards the lake and the area gets deeper towards the lake.…”

“…This entire process may lead to low to moderate reservoir quality parameters, thus affecting the recovery of available fluid in particular sediments. This derivative provides for a predictive reservoir quality model that can be used in future studies where similar sedimentological and structural settings have been identified [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42].…”

“…A number of formations had been identified within the SLAB (Tables 1&2). Claystones in lower parts of the Nkondo formation in the subsurface contained isolated thin sandstone stringers which provided the main oil reservoirs in the area and conflicting mid-miocene age and late pliocene age had been suggested from cuttings of Mputa-1 and Waraga-1 wells on the basis of palynomorphs [14,15] This formation was deposited in the marginal lacustrine to deltaic deposits, and dominated areas towards the lake shores [16]. Whereas coarser alluvial fan and fluvial deposits were more common towards the graben's marginal escarpment [17,15].…”

“…Claystones in lower parts of the Nkondo formation in the subsurface contained isolated thin sandstone stringers which provided the main oil reservoirs in the area and conflicting mid-miocene age and late pliocene age had been suggested from cuttings of Mputa-1 and Waraga-1 wells on the basis of palynomorphs [14,15] This formation was deposited in the marginal lacustrine to deltaic deposits, and dominated areas towards the lake shores [16]. Whereas coarser alluvial fan and fluvial deposits were more common towards the graben's marginal escarpment [17,15]. Nyaweiga formation was suggested to be of mid-miocene and late pliocene to early Pleistocene on the basis of Mputa Formation was of mid-miocene age and had been suggested in the Mputa-1 and Waraga-1 wells on the basis of palynomorphs, whereas RPS Energy suggested a late Pliocene age and the Formation's sandstones represent deltaic to fluvial sequences.…”