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Scirj, Volume IX [2021]
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Scirj Volume IX, Issue X, October 2021 Edition
ISSN: 2201-2796

Stratigraphic subdivision of Tertiary sediments Of Well 1 using total organic carbon (TOC) and gamma ray (GR) log: Case study, the Niger Delta

Benson Akinbode Olisa and Ayomide Samson Ifanegan

Abstract: Traditional methods of stratigraphic subdivision are based on biostratigraphy and well log analyses. The Tertiary Niger Delta is divided into Paleogene and Neogene. When biostratigraphic and well log data are not available, the method of total organic carbon (TOC) and geophysical responses of organic matter might be used. TOC (wt%) is related to gamma ray (API). TOC is first calculated from the GR log. The calculated TOC, GR( TOC) is plotted against depth. Results show that TOC decreases with depth. Miocene section (Neogene) has the highest value of TOC and Eocene (Palaeogene) has the lowest. There is a discontinuity surface between Oligocene and Miocene at 4500ft. This coincides with marker shale Bolivina 27 about 27.1Ma. Between Eocene and Oligocene in Well 1, the discontinuity is at 7100ft. This coincides with marker shale Uvigerinella 8 at about 38Ma.

Reference this Paper: Stratigraphic subdivision of Tertiary sediments Of Well 1 using total organic carbon (TOC) and gamma ray (GR) log: Case study, the Niger Delta by Benson Akinbode Olisa and Ayomide Samson Ifanegan published at: "Scientific Research Journal (Scirj), Volume IX, Issue X, October 2021 Edition, Page 46-50 ".

Search Terms: Tertiary sediments, Stratigraphic, organic carbon

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