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oa Drift Influence on Deep Marine Channel/Lobe Transition: A Case Study of Well X, Offshore Tanzania, Block 2
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Third EAGE Eastern Africa Petroleum Geoscience Forum, Nov 2017, Volume 2017, p.1 - 3
Abstract
This contribution presents an integrated case study of Well X, which targeted a drift-influenced slope channel complex in Cretaceous and Neogene stratigraphy of Block 2, offshore Tanzania. The large-scale architecture of several channel complexes reveals interaction with associated drift deposits with “levees”, displaying a high degree of asymmetry, being developed on the northern side of channel margins. We present a hypothetical model for these large, fine grained deposits and interpret them as the result of flow stripping of fine silt and clay form the channel axes and overbank by deep-marine bottom currents flowing from south to north. Well log data, core, and thin sections of Well X of the Upper Cretaceous enable us to support these large-scale observations with lithofacies and grain-scale observations.