The main oil source formations of the anambra basin. 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. Mr onwumere who led a team of experts to assess the volume of gas and crude reserves in the anambra river basin as well as gauge the preparedness of the state government in the establishment of an indigenous refinery through its oil company, orient petroleum resources, said the team was impressed with what it saw on the ground. Anambra basin is situated at the southwestern extremity. Having been in operation since 1946, the legend offers some of the highest skier and rider accessible terrain in north america where half of the mountain sits above the timberline with skiing and snowboarding through late spring and early summer. Mekong river basin international union for conservation. The anambra basin in the west of the lower region is more recent than the rest of the trough, being formed during a later period of compression, but is considered part of the formation. Aug 12, 2003 mr onwumere who led a team of experts to assess the volume of gas and crude reserves in the anambra river basin as well as gauge the preparedness of the state government in the establishment of an indigenous refinery through its oil company, orient petroleum resources, said the team was impressed with what it saw on the ground. Ladtpo department of geology and mlnera sciences university of llorln p. There had been a strong tendency to merge the anambra basin with the niger delta basin as one extensive. The anambra basin is about 40,000 km2 in size ogala, 2011 and is bounded to the west by the okitipupa ridge, in the east by abakaliki basin, and in the south by the niger delta basin fig. Seismic geohistory and differential interformational velocity analysis in the anambra basin, nigeria.
The process began with the flag off of a graduate farmers employment scheme gfes at the anambraimo river basin development authority in agbala, owerri north local government area of imo state. Kinematics of faults and joints at enugu area of the anambra basin. Sedimentology and sequence stratigraphy of the eocene. Wani case study mekong river basin 1 water and nature initiative wani c ase study mekong river basin authors. Of the nine rift basins in nigeria, hydrocarbons have been discovered in only four anambra basin, dahomey basin, southern bornu basin, and the gongola basinyola arm of the upper benue trough. Km onuoha, cip dim advances in petroleum geoscience research in nigeria. The benue trough was formed by rifting of the central west african basement, beginning at the start of the cretaceous period. 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.
The oldest sediment in the anambra basin is nkporo group nwajide, 1990. Of the four, only the dahomey basin has yielded commercially viable oil and gas deposits, as well as the vast undeveloped bitumen discoveries adegoke. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Sediments supplied to the anambra basin were probably.
Solid moisturizers natural, fresh, uplifting basin. P4and itiowe k5 1,5department of geology, university of port harcourt, port harcourt, nigeria 2 dept. The elements of water budget equation were analyzed for the agulu lake area and underlying aquifers. The state lies in the anambra basin, the first region where intensive oil exploration was carried out in nigeria. Pdf subsurface temperature variations and heat flow in. Anambra basin has about 6,000 m of sedimentary rocks. This could have introduced an accuracy which is beyond the original data. Critical concern is the presence of adequate baseflow to the pond. Nigeria is underlain by seven major sedimenta ry basins, viz. During the triassic, some 200 million years ago, northeastern new jersey was contiguous with northwestern africa. Most of the exposures of the lithofacies comprising the anambra sedimentary basin fill are exposed on the eastfacing scarp of the cuesta. To effectively and efficiently develop and manage water resources in the south east, by ensuring that we plan, harness and conserve surface and underground water for the benefit of the people. Peripatetic journalist extraordinary mcphee takes a close, lucid, resonant look at the modern scenery of the western us from the perspective offered by an understanding of geological processes.
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. Water budget analysis of agulu lake in anambra state, nigeria 1egboka, bce. The investigated sections consist of coarsening upward sequences with thick, dark gray shale at the base, grading upward through siltstones into. Arapahoe basin ski area ski resort resort and ski area. Anambraimo river basin development authority asked to. 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.
This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size distribution morphologic studies. An assessment of shale gas and shale oil prospects and challenges in the inland anambra basin. The main oil source formations of the anambra basin, southeastern nigeria. Water budget analysis of agulu lake in anambra state, nigeria.
Sedimentary succes sions in these basins are of middle mesozoic to recent age. Previous accounts of the stratigraphy of the lower benue trough such as those of reyment. 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. Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. The stratigraphic setting of southern nigeria comprises sediments of three major sedimentary cycles. The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation.
The data selection and validation process for the mekong river basin study involved three steps. The study area is located in the southern part of the anambra basin and covers about 2200 km 2. The area was chosen for this study because it is very accessible and the road trending nesw, i. Depositional environments, organic richness, and petroleum.
Reyment 1965, reyment and morner 1977 and zaborski 2000 described the transgressive and regressive cycles related to marine sedimentation in the area. 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. Anambra river1, ihadagu1 and very scanty 2d seismic information, anambra basin is under explored. It was deposited into the basin in late campanian, comprising nkporo shale, owelli sandstone and enugu shale reyment, 1965 and obi, 2001. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. The marginalshallow marine nkporo group is the basal lithostratigraphic unit of the late campanianmaastrichtian successions of the anambra basin, nigeria fig. Sedimentology and sequence stratigraphy of the nkporo. During the visit, the team also inspected the 20 kilometre access road to the oil wells and the 10 kilometre flow line for evacuating crude to a spot at anambra river basin from where evacuation. The western3, southwestern and southern boundaries of the anambra basin have however, been inferred to be. Pdf seismic geohistory and differential interformational velocity. It is part of the broader west and central african rift system. Characterization of the upper cretaceous sediments in the. Excitement as orient petroleum strikes oil in anambra.
Chemical characteristics of groundwater systems in the. Biostratigraphy and paleoenvironment of the coniacian awgu. Subsurface temperature variations and heat flow in the anambra basin, nigeria article pdf available in journal of african earth sciences 283. This page bundles the available data for the anambra basin in the africa. Palynomorphs distribution, biostratigraphy and paleoecology study. The lithologic units of the succession are basically shales with ironstone intercalation showing a. Both kinds of activities are critical to successful river basin management, and both are usually undertaken at various levels, including national level and international level in shared river basins, river basin level, and local or community levels. Sedimentology and sequence stratigraphy of the nkporo group. The basin is bounded to the south by the niger delta hinge line. Developing unconventional petroleum resources in nigeria. The base of this zone is the same as the top of zone ii.
The process began with the flag off of a graduate farmers employment scheme gfes at the anambra imo river basin development authority in agbala, owerri north local government area of imo state. Sedimentology,sequence stratigraphy,anambra basin,nanka formation and eocene. Introduction this study examines part of the sedimentary units of the eocene nanka formation of anambra basin exposed at lat. The investigation approach involved field sampling and collection of 12 sandstone samples from. Anambra basin is a cretaceous depocentre that received campanian to tertiary sediments nwajide, 1990 and obi, 2000. 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. The basin data is derived from a lower resolution grid which has been upsampled using gmt. Outcrops of the formation are well exposed along the long reach of orle stream in auchi as well as road embarkments at ayogwiri, fugar and othame environs in the western flank of the anambra basin, southwestern nigeria.
Pdf the palynological study of the northern section of the anambra basin at odagbo, southern part of the benue river was carried out. Megan cartin, rebecca welling, ganesh pangare and tawatchai rattanasorn the water and nature initiates wani activities in the mekong followed a strategy of mobilizing grassroots engagement of local stakeholders in decision making, while. Nigeria finds oil and gas in commercial quantities in anambra. It is located between longitudes 7 030 and 800 east and latitudes 6 026 and 630 north. Sedimentological attributes and stratigraphic of nanka formation, anambra basin,nigeria acra 2e. The images are hyperlinks and will open up a separate window with a high resolution pdf image of the map. Pdf subsurface temperature variations and heat flow in the. The position of the basin relative to plate margins 3. Anambraimo river basin development authority channels. It was deposited in early maastrichtian kogbe, 1989 and obi, 2000. Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. Subsurface evaluation of source rock and hydrocarbon. Anambra basin is one of the energyrich inland sedimentary basins in nigeria.
It extends northwestward into the niger valley, northward to the jos massif and northeastward as far as lafia. Oil seepages have also been reported from parts of the basin. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. The ankpa basin now has a sediment thickness of about 5000m comprising pre and. Maastrichtian successions of the anambra basin, southeastern nigeria. Sedimentology and sequence stratigraphy of the eocene nanka. To characterize the various depositional cycles and environments of the cretaceous successions through sedimentological and foraminifera paleontological study. Biostratigraphy and paleoenvironment of the coniacian. Paleogeography, sedimentation and tectonics of the upper. Nigerias frontier basinsunrealized rift system hydrocarbon. Chemical characteristics of groundwater systems in the southern anambra basin. Known as the legend, arapahoe basin is nestled high along loveland pass about 68 miles outside of denver, colorado.
There had, however, been strong tendencies in the past to merge the anambra basin with the niger delta basin as one extensive coastal basin or simply to, consider one an extension of the other 4. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. The first two cycles belong to the presantonian sediments while the third cycle belongs to postsantonian sediments which are. This study highlights the distribution of hydraulic conductivity k in the regional aquiferous ajali formation of senigeria on one hand and assesses the possible influences of textural and geochemical characteristics on the hydraulic conductivity on the other hand. Of the nine rift basins in nigeria, hydrocarbons have been discovered in only four anambra basin, dahomey basin, southern bornu basin, and the gongola basin yola arm of the upper benue trough. The benue trough is a major geological structure underlying a large part of nigeria and extending about 1,000 km northeast from the bight of benin to lake chad.
Orient petroleum resources plc opr was established to harness the vast but mostly untapped mineral, agricultural and human resources, especially hydrocarbon deposits in anambra basin, for the industrialization of the area, improvement of the socioeconomic wellbeing of the people while creating value for the stakeholders. Km 75 section was created by the road traversing the port harcourtenugu express way. The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. A sequence stratigraphic model for the group was developed by nwajide and reijers 1996, on the basis of stratigraphic analysis of a composite section located at leru, near okigwe. 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. The investigation approach involved field sampling and collection of 12 sandstone samples from different outcrop locations. Where the basin lies close to a plate margin, the type of plate interaction occurring during sedimentation. Hydraulic, textural and geochemical characteristics of the. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria pdf. To identify and characterize the various shale gas play within the anambra basin. To give a concise geological description of the outcrops.
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