Character of Northern Accommodation Zone of Lake Albert Basin and Its Role in Hydrocarbon Migration and Accumulation

Accommodation zone is an important tectonic deformation system in the rift basin and a favorable place for oil and gas accumulation. This paper discusses the northern accommodation zone of Lake Albert Basin of eastern Africa, where the faults are well developed and complicated. Many fault traps have been identified in this zone based on the attribute analysis and interpretation of 3D seismic data. Although the accommodation zone is located on the gentle slope and relatively long from the hydrocarbon center of the basin, the well-developed large river deltas in this area serve as the favorable reservoirs and provide quite good lateral paths for hydrocarbon migration. Combined with the understanding of regional tectonic geology and sedimentary reservoir, the author made a deep study on the hydrocarbon migration and accumulation, established the model of reservoir forming in the accumulation zone. It is concluded that the faults and sand bodies in the study area jointly controlled the migration and accumulation of hydrocarbons. The study provides a reference for the hydrocarbon accumulation in the rift accommodation zone in the similar areas.