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    Geology, geophysics and stratigraphic logging field work report of the Semliki Basin-Ntoroko District, Western Uganda

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    undergraduate dissertation (11.09Mb)
    Date
    2022-01-21
    Author
    Kusolo, Solomon Matanda
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    Abstract
    A field work and excursion study to the Albertine graben under the guidance of our lecturers was conducted for a period of 8 days. The area of study was Semliki basin located in the southern part of the Albertine graben in Uganda. The study area lies onshore south of Lake Albert, it is bounded by an escarpment to the east and south and River Semliki to the west. The aim of this study was to enable us apply the geological, geophysical and other knowledge we have acquired during the course of the program to understand the geology and analyse the petroleum system of the area practically. While carrying out the field work studies, environments of deposition as well as the depositional processes that took place in the area through the critical analysis of the stratigraphy and structures of the sediments were deduced. This was further supported through stereographic analysis as well as stratigraphic log interpretation. Many different facies types were identified in the area, as well as their significance in the formation of good reservoir rocks and seals. Through facies analysis, the petroleum potential and origin of the Semliki basin was deduced. The basin was affected by intensive tectonic activity as evidenced in the interpreted seismic sections, that led to the formation of vast types of structures with in the basement and sediments. The presence of hot springs with in the area indicated the presence of high enough thermal gradients for oil maturation. According to the Turaco well geophysical logs that were interpreted, the sediments were thick enough and are comprised of alternating layers of thick sand stones over lain by clays. These geophysical logs also showed the presence of hydrocarbons due to the cross overs observed between the neutron porosity and density logs.
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    http://hdl.handle.net/20.500.12281/11631
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