The present study examines the stratigraphic succession of benin and western nigeria offshore basins and attempts to compare these stratigraphic nomenclatures. The frontier basins in nigeria are found within the precambrian basement complex of southwestern nigeria. Anambra basin showing the extension of ajali sandstone drawn from geological map of nigeria, gsn, 1994. Sedimentology and sequence stratigraphy of the nkporo. An overview of the geology and hydrogeology of nigeria chapter pdf available. It is a shallow, linear depression with sedimentary fill of about 3,000 m thick udensi and osazuwa, 2004. The study area lies within the area referred to as the tertiary niger delta complex fig. Formation evaluation of an onshore oil field, niger delta nigeria. Subsurface evaluation of source rock and hydrocarbon. The two sub basins that drain into lake chad in nigeria are located in borno and yobe states, which falls within latitudes 10. Thermal conductivity for the underlying, marine shalysandstone agbada formation varies between 2. Nigeria is underlain by seven major sedimenta ry basins, viz. Heavy minerals and geochemical characteristics of sandstones as indices of provenance and source area tectonics of the ogwashiasaba formation, niger delta basin authors. Conceptual models of origin for nigerian frontier basin.
A faulted basement high, the okitipupa basement ridge separated the dahomey embayment from the benue trough until the late cretaceous subsidence and. Facies modelling and reservoir geology of the offshore sediments, southeastern, niger delta, nigeria matthew o. The durban and zululand basins are located off the southeastern margin of southern africa. Petrophysical evaluation of reservoir sand bodies is the continuing process of integrating and interpreting geological, geophysical, petrophysical, fluid and performance data to form a unified, consistent description of reservoir properties throughout the field.
These inland basins have no direct linkage with the niger delta,the atlantic. Onshore it extends 175 km eastward, covering a total surface area of 90,000 km 2 between the basement outcrop at the eastern limit and the 200 m isobath at the western. It is a preliminary stage process aiming to give additional information for the beginning of a stratigraphic harmonization project concerning sedimentary basins of the. Sedimentary basins range in size from as small as hundreds of meters to large parts of ocean basins. Regional geology of nigeria geology, nigeria the mapped area falls within the benue trough the oldest sedimentary rocks in nigeria is in this trough and they are of lower cretaceous age. An assessment of the geotechnical aspects of njaba river sediments in the eastern niger delta basin, southeastern nigeria c. Petroleum geology of cretaceoustertiary rift basins in niger, chad, and central african republic authors. This is an arcuate coastal basin, the onshore parts of which underlie the coastal plains of southwest nigeria, benin and togo. Sedimentary basins and petroleum geology of the middle east nairn, a. Anambra basin is one of the energyrich inland sedimentary basins in nigeria 153 it is a nearly triangular shaped embayment covering about 3000 km 2 with a total sedimentary thickness of approximately 9 km 2. Department of geology, university of nigeria, nsukka, nigeria 2department of physics, university of port harcourt, port harcourt, nigeria abstract data from sixteen deep wells drilled for oil exploration purposes in the anambra basin of southeastern nigeria indicate large variations in temperature gradients and heat flow within the basin. In new brunswick the older part of the matapedia basin has been called a forearc basin, which developed during extension. Weathered layer delineation in an x field in the niger. Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite.
The basin is structurally linked to the north with the termit basin with which. Odumodu cfr, mode aw 2017 trace fossils from the campanian maastrichtian enugu formation of the anambra basin, southeastern nigeria. Geological survey editorial standards or with the north american stratigraphic. Sedimentary succes sions in these basins are of middle mesozoic to recent age. Waec gce past questions and answers free download pdf all. The deeper and longer southern onitsha submarine basement feature, the nsukka high land and iii. Petroleum geology of cretaceoustertiary rift basins in. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. The nigerian national petroleum corporation nnpc and halliburton corporation have reached an agreement that will speed up oil discovery in the inland sedimentary basins.
In nigeria, the dominant type of basement rock intersected by wells drilled for hydrocarbons, limestone, or water is granite. Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l. Convergent boundaries create foreland basins through tectonic compression of oceanic and continental crust during lithospheric flexure. Implications for paleoenvironmental interpretation. Basement geology in the sedimentary basins of nigeria. A snapshot of the geotectonics and petroleum geology of.
The benue trough of nigeria is a sedimentary basin that extends from the gulf of guinea in the southwest to the chad basin in the northwest for about 800 km in length and 150 km in width. Source rock thermal maturation of campanian enugu shale in anambra basin, southeastern nigeria was assessed by rockeval pyrolysis. Geological survey of nigeria agency has played an active role in the exploration for mineral deposits in nigeria. The northwest southeastern trending bida basin forms one of the major inland sedimentary basins in nigeria. Sedimentary basins and petroleum geology of the middle. Purchase of an open document does not constitute license for republication in any form, nor does it allow web posting without prior written permission. Contains details on the geological units of nigeria and the associated mineral resources.
Formation evaluation of an onshore oil field, niger delta. Geotechnical assessment of gully erosion at ankpa area. Ten cretaceoustertiary rift basins in niger, chad and the central african republic c. Geological developments in the basin in terms of basin evolution and structural features have been discussed by many authors.
An assessment of the geotechnical aspects of njaba river. Sedimentology and depositional environments of the. Nnpc, halliburton intensify oil search in inland basin. Sedimentary basins and petroleum geology pdf download. Distribution of sedimentary formations in the bornu basin, nigeria article pdf available in shiyou kantan yu kaifapetroleum exploration and development 425. The three sedimentary basins in nigeria are underlain by continental crust except in the niger delta, where the basement rock is interpreted to be oceanic crust. When the caco 3 calcium carbonate was rated all the soils were considered suitable for irrigation use. Oshin department of geology, obafemi awolowo university, ileife, nigeria centre for energy, research and development, obafemi awolowo university, ile. Trace fossils from the campanian maastrichtian enugu.
Well logsderived radiogenic heat production in the. These two subbasins are named locally as the yedseramngadda subbasin to the south and the. Thermal conductivity, porosity, lithology, well logs, geometric mean model, niger delta basin, nigeria discovery and innovation vol. Pdf floods in the niger basin analysis and attribution. The sedimentary basin of gabon lies on the west coast of africa, both onshore and offshore, between lat. The geotechnical properties of clay occurrences around. Some geotechnical characteristics of sediments in the njaba river watershed were assessed to highlight their potentials as good construction materials. The plotting of the density and neutron logs on the same track was used for differentiating the hydrocarbon type in the reservoirs.
Geology and mineral resources of nigeria nuhu george. Geology and mineral resources of the lower benue trough. Leadzincbarytes mineralization in the benue trough. The presence of libycoceras dandense howarth in marine facies of the nkporo shale about 35 m below the nkporomamu contact in the lokpaukwuleru section demonstrates that in this area the. The lower benue trough is part of the benue trough of nigeria and it consists of a series of rift basins which form a part of the central west african rift system of the niger, chad, cameroon and sudan basement fragmentations. Pdf distribution of sedimentary formations in the bornu. Part 1 discusses the geology of the crystalline rocks and their regional distribution while the sedimentary basins constitute the subject of part 2. The values recorded for all the soils are less than 4 mm hocm 1. Irrigation suitability evaluation of asu river basin soils. The benue trough is one of the seven main sedimentary structural features in the sene nigeria.
Babatunde 2, and liao yuhong 3 1energy and environmental research group, dept of geology, university of ibadan, ibadan, nigeria. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. The lower benue trough like other sedimentary basins in nigeria is found to be endowed with mineral resources. Part 3 takes the mineral resources of nigeria one on one, their geological environment, mode of occurrence, localities. This overview of the petroleum geology of rift basins in niger, chad, and central african republic car is based on exploration work by exxon and partners in the years 19691991. The mineral resources so far reported in the trough by the geological survey of nigeria agency are discussed below. Sc0951430 has satisfactorily completed the requirements for research work for the. Radiogenic heat production estimated from the concentrations of the radioactive elements obtained from log data from a well drilled in the chad basin, ne nigeria range between 0. Tectonic extension at divergent boundaries where continental rifting is occurring can create a nascent ocean basin leading to either an ocean or the failure of the rift zone. It lies between longitude 5 o 35 1 e and 5 o 39 1 e and latitude 9 o 10 1 n and 9 o 1 n of nigeria on sheet 183 egbako s. The continental sediments of the nigerian coastal basins. Sedimentological characteristics of ajali sandstone at. Drainage basin morphology and terrain analysis of the.
A nigerian newspaper and online version of the vanguard, a daily publication in nigeria covering nigeria news, niger delta. Weathered layer delineation in an x field in the niger delta basin of nigeria. The data also indicated that the sediments are low in the concentration of the radioactive element potassium, normal in thorium and. Simpson 1954, reyment 1965, hogue and ezepue 1977 and ladipo 1986 have discussed the. Kutigi is the major town in the area, while the surrounding villages include. Sedimentary basins form primarily in convergent, divergent and transform settings. Umunya section, niger delta basin, nigeria adaeze i.
The essential element of the concept is tectonic creation of relief, to. Oil seepages have also been reported from parts of the basin. The shallow and smaller ankpa subbasin to the north, which is separated from ii. The main oil source formations of the anambra basin, southeastern nigeria. The nigeria chad basin is part of the bornu basin, an intracratonic rift basin having an area of 2,335,000 km 2 and covering chad, niger, the cameroun republics, and northeastern part of nigeria. Pdf an overview of the geology and hydrogeology of nigeria. The site of the seepage is now classified as part of nigerian inland frontier basins1,2. Sedimentology and sequence stratigraphy of the nkporo group campanianmaastrichtian, anambra basin, nigeria sandstones obi, 2000. Physiographically, the anambra basin can be subdivided into three main subbasins ladipo, 1986. Electrical conductivity values for all the soils are low table 8.
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