University of Khartoum

Reservoir Characterization Of The Aradeiba Main Sand Based On Sedimentological Aspects - Muglad Basin Sw-Sudan

Reservoir Characterization Of The Aradeiba Main Sand Based On Sedimentological Aspects - Muglad Basin Sw-Sudan

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dc.contributor.advisor Omer Elbadri. en_US
dc.contributor.author Ali, Yasir Abdalla Abass
dc.contributor.other Department of Geology en_US
dc.date 2012-01
dc.date.accessioned 2015-11-16T12:17:45Z
dc.date.available 2015-11-16T12:17:45Z
dc.date.issued 2015-11-16
dc.date.submitted 2015
dc.identifier.uri http://khartoumspace.uofk.edu/123456789/17166
dc.description.abstract The Santonian continental fluvial Aradeiba Formation has been investigated based on the lithological data obtained from five (5) wells in the Heglig field, Muglad Basin. Various methods have been used including different sedimentological, petrographical and petrophysical techniques, conventional cores investigation, polarized microscope is used for petrograhy, X-ray diffraction analysis, Scanning electron microscopy, mudlogs and wireline logs inspection. The lithofacies analysis indicate that Aradeiba Main Sand is composed of coarse sandstone that reveal coarsening upwards deltaic mouth bar with minor fining upwards sequences of distributary channels. The dominant sandstone intercalated by fine sandstone, siltstone and claystone that reveal coarsening upward sequence of prodelta and delta front. The stratigraphic successions of lithological facies and depositional patterns of Aradeiba Main Sand reflect mainly allocyclic and autocyclic controls such as tectonic activity, climate, drainage system, and sediment load. The stratigraphic thickness of the formation was measured from logs and found to be ranging from 10m to13.5m. The clay minerals of Aradeiba Main Sand consist mainly of kaolnite, smectite, illite and chlorite. The kaolinte and semcitite indicate a warm humid climate interrupted by dry seasons. The mixed layer of illite /smectite revels the influence of the burial diagenesis with increasing depth and temperature. The clay mineral assemblages of Aradeiba Main Sand show relationship with lithofacies types and depositional system. The diagenetic event has played considerable role in modifying the original framework components of Aradeiba as well as the primary intergranular porosity of these sandstones. Therefore, the reservoir quality was mainly controlled by the original framework composition, cementation and to a lesser extent by compaction. The present-day porosity in these sandstones ranges from about 19-26% in highly friable textures to <3% in carbonate cemented and compacted muddy textures and it‟s average is about 22. Permeability ranges from 1.9 - 7476. m/d and it‟s average is about 1510 m/d. The reservoir is relatively thinner in the Aradeiba Main Sand(10-13.5m), and the shape of sand bodies are mainly sheet and massive in this layer, and have good lateral continuity. The sand bodies are extended in the northern part of the area, the economic value of Aradeiba Main Sand is considered in 2006 after exploring the hydrocarbon by Greater Nile Operating Company (GNPOC) en_US
dc.language.iso en en_US
dc.publisher University of Khartoum en_US
dc.subject Sudan en_US
dc.subject Aradeiba Main Sand en_US
dc.subject Reservoir en_US
dc.title Reservoir Characterization Of The Aradeiba Main Sand Based On Sedimentological Aspects - Muglad Basin Sw-Sudan en_US
dc.type Thesis en_US
dc.Degree M.Sc en_US
dc.Faculty Science en_US

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