The book is divided into three parts. Part 1 discusses the geology of the crystalline rocks and their regional distribution while the sedimentary basins constitute the subject of Part 2. Part 3 presents the mineral resources of Nigeria, their geological environment, mode of occurrence, localities and where possible their estimated reserves. This is followed by an account of the previous and current mining policies including that of petroleum of the Nigerian government and highlights those areas of the minerals sector favorable for investment in the near future. Skip to main content Skip to table of contents.
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Scientific Research An Academic Publisher. Kogbe, C. Two models were used each for predicting pore pressure and the corresponding fracture pressure using well log and drilling data. Shale lithology in Niger Delta is massive and characterized by high pore pressure; hence shale compaction theory is utilized in this study.
The density and sonic logs were used respectively to generate the shale trend and the shale normal compaction trend used for the prediction. The wells studied showed disequilibrium compaction of sediment to be the major mechanism that gave rise to overpressure in the Niger Delta.
Clay diagenesis and fluid expansion were also observed as the secondary overpressure generation mechanism in well X This secondary overpressure mechanism was observed to start approximately at depths of 10, ft TVD. The top of overpressure and the pressure range in the wells studied varied from to 11, ft TVD and Since the study revealed presence of secondary overpressure generation mechanism, Bowers model was observed to be the most reliable pore pressure prediction model in the area.
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Geology and Mineral Resources of Nigeria