Anambra basin in 2015, seven energy increased its footprint in south east nigeria, acquiring an additional 50% licence interest in opl 905. Pdf the fish fauna of anambra river basin, nigeria. The codes for the regions and provinces are listed in klett and others 1997. The anambra basin, located in the southern benue trough is a post santonian synclinal sedimentary structure containing over 5,000m thick of upper cretaceous to recent sediments.
Geographically, it is situated between longitude 7000e 7030e and latitude 6000n 6030n. Diagenetic study of sandstone sediments in parts of. Sedimentation in the anambra basin thus commenced with the early campanian early maastrichtian of the enugu and nkporo formations lateral equivalents which consist of a sequence of bluish to dark grey shale and mudstone locally with sandy shales, thin sandstones and shelly limestone beds. The total aeromagnetic data covering the study area was subjected to first vertical derivative, spectral depth analysis, and source parameter imaging spi. Petroleum system two digits to the right of province code 316205. Onitsha was selected for this study being strategically located and drained by several rivers including the river niger. Anambra basin, enugu shale, rockeval pyrolysis, total organic carbon, source rock, thermal maturation introduction the anambra basin figure 1 which is a cretaceous basin is located in the southern part of the regionally extensive northeastsouthwest trending benue trough.
Subsurface evaluation of source rock and hydrocarbon. Depositional environments, organic richness, and petroleum. The sequence includes lower maastrichtian subbituminous coals in the anambra basin. Rearrange individual pages or entire files in the desired order. It is frequently regarded as the northwestern extension of the anambra basin, both of which were major depocentres during the third major transgressive cycle of southern nigeria in late cretaceous times. It is overlainby the ezeakuformation, which constitutes the turonian deposits. Oil seepages have also been reported from parts of the basin. The origin and tectonic history of the benue trough and in. The group now holds a combined 90% licence interest in opl 905, a 22. Anambra basin, geology, depositional environment, mamu. Do you have multiple pdf files that need to be combined into one big document.
The stratigraphic evolution can be outlined using subsurface data and correlation along sections connecting several wells in the anambra basin. Eocene lithic fills in the anambra basin and afikpo syncline is divisible into three main transgressiveregressive cycles reyment, 1965. Apr 05, 2017 stakeholders on water have asked the anambra imo river basin development authority to embark on the recycling or reuse of waste water to ensure rapid economic development of its catchment areas. The tectonic, stratigraphic and organic geochemical evaluations of these basins suggest the similarity with the contiguous basins of chad and niger republics and sudan, where commercial oil discovery have been. The result from the first vertical derivative shows that the northern part of the area is covered by the young biotite granite of precambrian origin, and the western edge is covered by the old granite, gneisses, and. The study area is located in the southern part of the anambra basin and covers about 2200 km 2. The result from the first vertical derivative shows that the northern part of the area is covered by the young biotite granite of precambrian origin, and the western edge is covered by the old granite, gneisses, and migmatite of western. Download fulltext pdf download fulltext pdf the fish fauna of anambra river basin, nigeria. Department of zoology, university of nigeria, nsukka, enugu state, nigeria. Isotope study in the iullemeden aquifer system 85 4. Though quite a number of studies 7, 8, 2225 have been done on age and paleoenvironment of imo shale formation, however limited studies, 14, 26 were. The anambra basin is a relatively underdeveloped region rich in gas resources, which we look to harness to provide gas for local industry in the medium to longterm. Hence, reconstruction of the maximum burial depth and paleotemperature of viable source beds is recommended as necessary input into a successful exploration strategy for the basin. Province three digits to the right of region code 3162.
Asu river group is the oldest stratigraphic unit in anambra basin. Nigeria is underlain by seven major sedimenta ry basins, viz. The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. The dataset used for the study are 2002 landsat image, 2007. Analysis of the sedimentological and stratigraphical characteristics of the deposits allix, 1987 shows three main period figure 3 in the evolution of the basin. Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. Anambra basin has about 6,000 m of sedimentary rocks. Maximum sediment thickness in this area is about 6 km i. Olatunji palystrat limited, ibadan nigeria madukwe, henry y department of geology, ekiti. The images are hyperlinks and will open up a separate window with a high resolution pdf. Paleoecology of enugu and mamu formations in anambra basin. Onuoha department of geology, university of nigeria, nsukka, enugu state, nigeria.
The main objective was to simulate the hydrocarbon generation and expulsion in the nkporo source horizons encountered in igbariam1, iji1, and ajire1 wells drilled in the basin, using the onedimensional genesis zetaware basin. Assessment of aeroradiometric data of southern anambra basin 745 kuforijimi, olorunsola. Gravity models as tool for basin boundary demarcation. The anambra basin, it is generally characterized by sediments of cretaceous and younger ages. Excitement as orient petroleum strikes oil in anambra.
All uploads and downloads are deemed secure and files are permanently deleted from the smallpdf servers within an hour. How to merge pdfs and combine pdf files adobe acrobat dc. This name later came to be shortened to anam bra anambra, the name it officially bears to date. The study area is part of anambra basin, south eastern nigeria. Sequence stratigraphic interpretation of late cretaceousearly paleogene sediments in the central part of southern anambra basin, nigeria. Anambraimo river basin development authority asked to. The anambra basin is located in the southeastern part of nigeria. Olaburaimo and akaegbobi, 2012a, 2012b and olaburaimo, 2012, 20. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. Click, drag, and drop to reorder files or press delete to remove any content you dont want.
Sequence stratigraphic interpretation of late cretaceousearly. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria pdf. Mgbenka department of zoology, university of nigeria, nsukka, enugu state, nigeria. The anambra river flows 210 kilometres mi into the niger river and is found in anambra, nigeria. The nkporo shale documents the transgressive event that. Sedimentology and depositional environment of the mid. The images are hyperlinks and will open up a separate window with a high resolution pdf image of the map. Here is how you can manage the process of combining pdfs on both macs and pcs. Sedimentological attributes and stratigraphic of nanka formation, anambra basin,nigeria acra 2e.
The sediments of anambra basin include the albiansediments which comprise of asu river group. Nov 28, 20 this study is a contribution to the understanding of the play fairway in the anambra basin. Department of geology, ekiti state university, ado ekiti nigeria olaburaimo a. This could have introduced an accuracy which is beyond the original data. Geochemical and geophysical investigations of kaolin. It is bounded to the north by bida basin and northern nigerian massif, to the east by benue trough, to the west by west african massif, and to the south by niger delta 14.
Aspects of the biology of clarias gariepinus in anambra river basin. The flow of the anambra river is released into the atlantic through various outlets forming the 25,000squarekilometre 9,700 sq mi niger delta region. Diagenetic study of sandstone sediments in parts of anambra. The analysis and interpretation of the data sets allow the reconstruction of sedimentary facies parameters, diagenetic histories, dominant controls on sequence development, and allow an added interpretation of the sediments of the northern niger delta and anambra basin reservoir qualities. Abstract aspects of the reproductive biology of the african catfish, c. Petroleum potentials of the nigerian benue trough and. The basin data is derived from a lower resolution grid which has been upsampled using gmt. P4and itiowe k5 1,5department of geology, university of port harcourt, port harcourt, nigeria 2 dept. Statistical study in the iullemeden aquifer system 89 5. Controversy surrounding the stratigraphy of the anambra basin, depositional. The investigated sections consist of coarsening upward sequences with thick, dark gray shale at the base, grading upward through siltstones into. P 3 1,department of geology, university of port harcourt, port harcourt 2,3 dept. Assessment unit two digits to the right of petroleum system code 31620504. Play fairway evaluation of the anambra basin, southeast nigeria.
This study has shown that there is more oil in the anambra basin than previous authors claimed, and the distribution of oil and gas in. It is believed to occupy a geographic position among the be nue trough, the middle niger depression, the niger del ta and the abakiliki anticlinorium figure 1. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. These successions were invaded by intrusives, volcanic rocks, and veintype leadzinc minerals, especially in the albiancenomanian section of the abakaliki anticline. 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. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size distribution morphologic studies. The basin is bounded to the south by the niger delta basin hinge line. Profile line 3 appears to have passed through the centre or deepest part of the anambra basin. Uzoegbu and others published lithostratigraphy of the maastrictian nsukka formation in the anambra basin, s. This paper presents the results of the structural interpretation over part of anambra basin carried out using aeromagnetic and landsatetm data. Evidence from field relationship and sedimentological study adeigbe, o. Before you combine the files into one pdf file, use merge pdf to draganddrop pages to reorder or to delete them as you like. Aspects of the biology of clarias gariepinus in anambra.
It extends northwestward into the niger valley, northward to the jos massif and northeastward as far as lafia. Hydrochemical study in the iullemeden aquifer system 79 4. The shaly facies grade laterally to sandstones of the owelli and. The main oil source formations of the anambra basin. The areal extent maps were generated using the reports of the stratigraphic subsurface horizons of amansiodo1, ihandiagu1, igbariam1, alo1, anambra river1, akukwa1, and nzam1. The anambra basin is a cretaceous basin having almost a roughly triangular shape figure 1 with a total.
The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Geochemistry of maastrichtian clastic sedimentary rocks. Anambra basin located in the south benue trough is a. Among the earlier works on the study of the stratigraphy of anambra basin include reyment, 1965.
Assessment of undiscovered petroleum in the tertiary niger delta. The study area lies within the anambra basin and it is made up of enugu. This could have played, at least, a supportive role in producing the predominance of gas plays in the anambra basin. Basinwide stratigraphic correlation across the anambra basin using base of the. Kinematics of faults and joints at enugu area of the anambra basin d.
Stakeholders on water have asked the anambra imo river basin development authority to embark on the recycling or reuse of waste water to ensure rapid economic development of its catchment areas. Ten 10 representatives outcrop samples collected from two stratigraphic sections in the study. Anambra basin is one of the energyrich inland sedimentary basins in nigeria. Kinematics of faults and joints at enugu area of the. A study of hydrocarbon generation and expulsion of the. Aromatic hydrocarbon distribution and calculation of oil and gas volumes in postsantonian shale and coal, anambra basin, nigeria, by i. Case studies of anambra and abakaliki basins, southeastern nigeria rita u. Detrital rocks are formed by the sedimentation of minerals and rock fragments that were derived from mechanical breakdown of preexisting rocks in the source area, and were transported to a depositional site basin. It was done by estimating the geographic extent of the basin s petroleum system in order to create the areal extent maps. Pdf petroleum potentials of the nigerian benue trough. Anambra basin showing the extension of ajali sandstone drawn from geological map of nigeria, gsn, 1994. Aspects of the biology of clarias gariepinus in anambra river.
Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. Anambra basin, enugu shale, rockeval pyrolysis, total organic carbon, source rock, thermal maturation introduction the anambra basin figure 1 which is a cretaceous basin is located in the southern part of the regionally extensive northeastsouthwest trending. Aspects of hydrocarbon potential of the tertiary imo shale. This page bundles the available data for the anambra basin in the africa.
Though the anambra river basin was known to be rich in crude oil and gas deposits. Pdf geology and depositional environment of campano. The nkporo shale documents the trans gressive event that. Diagenetic study of sandstone sediments in parts of anambra and afikpo basins, southeastern nigeria onyekuru, s. Integration of electrical resistivity and induced polarization for subsurface imaging around ihe pond, nsukka, anambra basin, nigeria. Sedimentology and sequence stratigraphy of the nkporo group. Pdf the study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka. The main oil source formations of the anambra basin, southeastern nigeria. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. Sedimentological characteristics of ajali sandstone at okigwe. The sedimentary rocks comprise ancient cretaceous deltas, somewhat similar to the niger delta, with the nkporo shale, the mamu formation, the ajali sandstone and the nsukka formation as the main deposits. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Accepted 23 august, 2010 structural analysis of joints and fault data obtained from exposures of the enugu and mamu formations.
Click add files and select the files you want to include in your pdf. Geochemical data of the iullemeden aquifer system 79 4. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. Structural interpretation of part of anambra basin nigeria using aeromagnetic and landsat etm data. The stratigraphic successions in the bida basin and their relationship to those in the. The dataset used for the study are 2002 landsat image, 2007 ikonos image, water quality variables and settlements point data. The niger delta basin, underlying a total area of over 256,000 km 2, is a cenozoic clastic buildout that rests on top of two older sedimentary entities benue trough and anambra basin within an aulacogen defined by the chain and charcot fracture zones. Hydrocarbon generation indications from source rock to reservoir rock. Geological and mineral map of the study area adapted from geological and mineral map of nigeria, 2009, nigerian geological survey agency. Since then we have increased our interest in the area, acquiring a 22. Palynological and sequence stratigraphy characterization of the earlylate campanian nkporo shale, orekpekpeimiegba area, anambra basin, nigeria adebayo olajide f.
You can merge pdfs or a mix of pdf documents and other files. These cycles correspond to major marine incursions in the late campanian, paleocene and eocene, representing second order depositional sequences murat, 1972. This study is a contribution to our understanding of the hydrocarbon potentials of the nkporo shale in the anambra basin, nigeria. Basin a is suspected to be the extension of the benue trough across the study area, while basin b is the anambra basin. Geology and mineral resources of the lower benue trough. Structural interpretation of part of anambra basin nigeria. The river is the most important feeder of the river niger below lokoja. What links here related changes upload file special pages permanent link page information wikidata. Although several works have proved the existence of oil and gas in the campanian to maastrichtian strata of the anambra basin, it is still.
The basal shale unit of the enugu formation documents very few senegalinium bicavatum and sparse burrows of thalassinoides isp. A total of 22 occurrences have been reported across nigeria challenges facing solid mineral development in nigeria low metal prices depleted alluvial reserves of tin and columbite. The basin is bounded to the south by the niger delta hinge line. Tertiary niger delta akataagbada petroleum system no. Dispersal patterns of the late cretaceous to early.
These sediments contain alternating shales and siltstones with occurrences of sandstone. Hydrocarbon generation indications from source rock to. Assessment of the suitability of some sites for aquaculture. Biostratigraphy and paleoenvironment of the coniacian. Pdf structural interpretation of part of anambra basin. Pdf the study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. The anambra basin extends over a roughly triangular territory, estimated at about 95,000 km2 wide 1. Anambra and bida basins indicates thats the successions of the anambra basin reached up to 8 km thickness compared with an average of 3. Assessment of aeroradiometric data of southern anambra.
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