Speakers

Tumushabe Wilson Mbile

Tumushabe Wilson Mbile

Geologist

Directorate of Petroleum, Ministry of Energy and Mineral Development, Uganda

Tumushabe Wilson Mbile is Geologist in the Directorate of Petroleum in Uganda. He hold a Bsc DEGREE IN Geology and chemistry, a certificate in Fundamental to Advanced Technologies for Petroleum Exploration in Exploration Geology at Japan Oil and Gas, Mineral Corporation (JOGMEC). He also attained a Master of Science Degree by Research majoring in Sedimentary Geology from University of Dublin, Trinity College Dublin, Republic of Ireland (2013) and Bachelor of Science Degree in Geology and Chemistry (Second class Upper) from Makerere University, Uganda (2005). Apart from this formal training highlighted, he has undergone several short training/workshops in different petroleum related courses i.e, software, stratigraphy, core storage etc. Tumushabe started his professional career working as a consulting Geologist in ground water at AQUATECH Enterprise Uganda Limited from July 2005 to March 2009 after completing his undergraduate degree from Makerere University. During that time, he executed many ground water projects throughout Uganda for International and Local Organizations/Governments. His main tasks were ground water siting/mapping, extraction and contract management. Tumushabe later joined Petroleum Exploration and Production Department (currently Directorate of Petroleum) of Ministry of Energy and Mineral Development, Uganda as a Geologist in April 2009 where he has since worked to date. He has been involved in different petroleum exploration, development and production operations and all other related petroleum resource assessment & evaluation activities together with regulating the petroleum industry in the Country.  He has attended and presented papers at different conferences worldwide including in the AAPG. Mr. Tumushabe’s key research interests are in Sedimentology, Stratigraphy, Basin analysis, conventional and unconventional hydrocarbon resource evaluation/assessment.


ABSTRACT

SESSION 7:  Sedimentary Response to Climatic change and active rifting in the Lake Edward basin, Albertine Rift, Uganda

The study area is the onshore Ugandan Lake Edward basin, Albertine rift, Uganda that is located in the northernmost part of the western arm of East African Rift System (EARS). Dominion Petroleum Ltd carried out petroleum exploration in the Lake Edward basin i.e., field geological mapping, seismic data acquisition and interpretation etc. This resulted in the drilling of the Ngaji-1 well, the only deep well in the entire area. The major aspects of this research project were; (1) to evaluate the sedimentology and stratigraphy of different lithologies in this area using ‘lithofacies’ or ‘lithofacies associations’ (2) re-visit the lithostratigraphic framework of this area and (3) determine how climate and tectonism have influenced sedimentation style, with the major emphasis on further unravelling the petroleum potential of the area. XRF and clay mineralogy (XRD) studies proved to be of less significance in the paleoclimatic interpretations of sediments within the study area, Lake Edward basin and therefore only ICP-MS/OES data has been used in this project.

From field geology and geochemical data (ICP-MS/OES), it was confirmed that climate and tectonism played a significant role during sedimentation in this basin. It has been found that all scenarios that had been raised in the predictive coupled climatic-tectonic model are present within Lake Edward basin. Results from this research however have also show that rift-fill sediments in the south and eastern Lake Edward basin (close to the rift shoulders) are majorly dominated by fluvial and alluvial distributary fan complexes and within these fan complexes, could be recognised during the detailed stratigraphic logging to describe the different Lacustrine packages were encountered within the basin fill sediments close to the present day Lake Edward. 

Sediments within the study area were identified and classified into four members: (1) Kabagwe, (2) Rushaya, (3) Kiruruma and (4) Kisenyi members. However, like in previous research work within the area, the main challenge was to locate the definite chronostratigraphic markers for these members. It has been further confirmed that sediments in the Lake Edward basin represent a petroleum play for hydrocarbon generation and accumulation, in which the necessary elements of a valid petroleum system were identified i.e., there are excellent or good potential for reservoirs and top seals as well as circumstantial evidence of regionally source rocks, possible seals, traps and hydrocarbon-migration pathways.