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ABSTRACT
Thirty (30) sidewall core slab samples within the interval of 7329ft – 9055.5ft from TIMO-01 well, Greater Ughelli Depobelts, Niger Delta Basin, were subjected to sedimentological analysis using a reflected binocular microscopic for the sedimentological description of the samples based on their textural properties, heterogeneity, homogeneity of the Lithofacies units. A total no of (3) lithofacie units were delineated on the basis of their homogeneity and heterogeneity of the penetrated sedimentary succession of the JOSH-1 well with the view to infer the petroleum elements within the logged intervals. Textural analysis of the sidewall core samples were carried out to build a lithologic model of the penetrated sedimentary succession. Two major lithofacies units were delineated, these includes; sand and shale. The studied well revealed one (1) potential reservoir sand body within the interval of 8925ft to 9049ft (124ft thickness).The integration of the geology and the lithofacies description indicates a transitional environment of deposition. In terms of mineralogical composition, observed minerals are quartz, feldspar and mica. The shale lithozone (source rock) which is a non-porous and an impermeable layer serve as a seal and a trap, while the sandstone lithology (reservoir rock) is porous and permeable. A lithostratigraphic model was established for the studied intervals. To complete the results of this study, backup study is necessary to achieve better results and this include High Resolution Biostratigraphic studies. This study should be carried out on all wells of the field. This is to firmly establish the detectable bio events that would facilitate a more accurate sequence stratigraphy correlation of the entire well in the field. It will be much better if a standard State-of-the-Art Biostratigraphic Laboratory be sited in the Department of Geology, University of Benin.
