Cretaceous–Quaternary seismic stratigraphy of the Tanga offshore Basin in Tanzania and its petroleum potential

Abstract In this study, the available 2D seismic lines have been interpreted to understand basin development and petroleum potential of Late Cretaceous–Quaternary stratigraphy Tanga offshore Basin in Tanzania. Conventional interpretation has delineated eight sedimentary fill geometries, fault properties, stratal termination patterns unconformities characterizing studied stratigraphy. The Cretaceous was found be characterized by tectonic quiescence uniform subsidence where slope induced gravity flows that resulted during Miocene block movements major mechanism sediment supply into basin. Quaternary dominated extensional regime created deep N-S NNE-SSW trending graben. graben accommodated thick Pleistocene Holocene successions deposited when rate uplift surpasses sea level rise. Thus, deposition lowstand system tracts debris flow deposits, fan turbidites, channel turbidites overbank wedge known for their excellent reservoir qualities, especially charged Karoo Black Shales. Subsequent transgression lead emplacement marine deposits with characteristic reflection indicate occurrence shale sealing rocks study area. all necessary play systems confirms hydrocarbon generation, accumulations preservation Basin.