It is situated at the right bank of the bonny river approximately 65km inland from the bight of bonny. Integrated reservoir quality study of deepwater clastic. Geostatistical assessment of groundwater quality from. Assessing wetland services in the niger delta, nigeria. The area is characterized by a mosaic of floodplain deposits and. Regional setting of niger delta basin after emery et al. The fundamental causative event for the origin of the niger delta basin was the breakup of the gondwana supercontinent. Stratigraphy and sedimentology of the niger delta in. This was aimed at increasing the resolution for prediction of reservoir, seal, and source rocks in the eastern part. Evolution of the niger delta is closely linked to the geodynamics related to the separation of the african and south american continents and the tectonics of the formation of the benue trough. Niger delta basin geology is part of wikiproject geology, an attempt at creating a standardized, informative, comprehensive and easytouse geology resource. The basin is deformed by large synsedimentaty faults, roll.
Geological survey, written communication, 1999, the thickness of source rocks required by the above equation is 825 meters. Tectonic activities, climate and eustasy are the major factors responsible for transgression and regression through the entrant point along the present niger delta area and the deposition of. It is bounded in the west by the dahomey basin, in the east by abakaliki fold belt, in the south by gulf of guinea and in the north. Thus, the niger delta is regarded as the twelfth richest area in oil resources worldwide klett et al. This basin is very complex, and it carries high economic value as it contains a very. Udoh 1,2department of geology, university of port harcourt, port harcourt, nigeria.
The thermal state of the niger delta basin is presented. Introduction the niger delta is ranked among the worlds major hydrocarbon provinces in the world. An estimate of oil window in nigeria niger delta basin. Jacobbergerh accepted 28 january 1986 remote sensing and field mapping formed the basis for a morphological study of the upper inland niger delta, centered on the region surrounding jenne and mopti, mali. Estimation of reservoir potentials of two wells in niger. The niger delta sofiri peterside patterson ogon one of the great deltaic regions in the world, the niger delta is a vast sedimentary basin constructed over time through successive thick layers of sediments dating back 4050 million years to the eocene epoch. Detailed studies on depositional sequence, genetic facies, and depositional environment were done using sequence stratigraphic tool in the paralic sequence of middle to late miocene age in the coastal swamp depobelt of the niger delta basin. The niger delta basin, also referred to as the niger delta province, is an extensional rift basin located in the niger delta and the gulf of guinea on the passive continental margin near the western coast of nigeria with suspected or proven access to cameroon, equatorial guinea and sao tome and principe. During the cenozoic, until the middle miocene, the niger delta grew through pulses of sedimentation over an oceanwarddipping continental basement into the gulf of guinea. The field of study is located in the northern depobelt of the niger delta basin in the gulf of guinea. Petroleum potential of paleogeneneogene sediments from the western niger delta basin as penetrated by the well tn1 has been carried out using rockeval techniques, with a view to assessing source rock potentials and maturity status of sections of the agbada and akata formations penetrated in the well.
The niger delta basin is characterized with shale diapirs, growth faults and associated rollover anticlines. Midlower miocene agbada sedimentary intercalations of ab field in the coastal swamp depobelt, western nigerdelta, were evaluated to determine their sequence stratigraphic character. Effects of dredging operations on fishing sites in the. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Formation evaluation of an onshore oil field, niger delta. Stratigraphy and sedimentology of the niger delta 7 during the middlelate eocene, sediment was deposited fig. Petroleum potential of paleogeneneogene age sediments in. The region is the most blessed deltas in the world, in both human and material resources but the unfavorable manner in which these resources are harnessed overtime, is the bane of the regions predicament.
The researcher found that the bulk of the hydrocarbon encountered in the niger delta basin was found to be within a depth range of 5,473,381 ft 1,668. The niger delta basin, located on the western edge of the african continent and southern part of nigeria, covers an area of 75,000 km 2 and consists of 900012,000 m of clastic sediments ojo et al. Pdf ecosystem of the niger delta region of nigeria. Oil and gas in the niger delta are primarily produced from. Map of the niger river basin, showing the four sub basins. In this paper, the thermal state of the niger delta basin is presented. The niger river basin is an extraordinary asset for the nine countries that are within its watershed and for the broader west and central africa region. The study adopted both field and laboratory based analytical procedures to generate the data required. N department of earth sciences, federal university of petroleum resources, effurun, nigeria abstract palynological biostratigraphic studies were carried out on ditch cutting samples obtained from wells l1 and. The niger delta basin is situated in the gulf of guinea in equatorial west africa, between latitudes 30n and 60n and longitudes 50e and 80e reijers et al, 1996 fig. Reconstruction of the subsurface depositional history of.
During the following decades the temperature measurements in boreholes were an important element of the hydrocarbon prospecting. Niger delta sedimentary basin is a large arcuate delta of the destructive dominated wave type that has been explored for oil and gas and exploited since 1958. The benin formation is the topmost lithostratigraphy and it is a continental deltaic sands. The niger delta is situated on the gulf of guinea on the west coast of central africa figure 1.
The hydrocarbon reservoirs in this study were found to be in the agbada formation, which is in conformity with the geology of the niger delta, nigeria. Stratigraphy and petroleum plays of the late to middle. Geological survey unpublished proprietary niger delta data and assuming a density of 2. Ology of the niger d nigeria and s ry is the benin the west afric defined by outc nd further eastthe adjacent p ince is define rn boundary of ransformfault ediment thickn in areas whe o the south and s in the basin h ic units. Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l.
Subsurface temperatures obtained from continuous temperature logs in 260 wells allowed to stabilize for several months were used in determining the geothermal gradients in the niger delta. Weathered layer delineation in an x field in the niger. The analysis was based on a combination of data sets including logs of six wells to describe lithic variations of the agbada formation within the ab field. The study area lies within the area referred to as the tertiary niger delta complex fig. A new threefold lithostratigraphic subdivision is introduced for the niger delta subsurface, comprising an upper sandy benin formation, an intervening unit of alternating sandstone and shale named the agbada formation, and a lower shaly akata formation. Weathered layer delineation in an x field in the niger delta basin of nigeria. Structural and stratigraphic mapping of delta field.
Remarkably, the niger delta is a coastal region of global environmental and. Geology and mineral resources of the lower benue trough. The niger delta is framed on the northwest by a subsurface continuation of the west african shield, the benin flank. Subsurface temperatures from continuous temperature logs in 260 wells allowed to. The niger delta clastic wedge formed along a failed arm of a triple junction system aulacogen that originally developed during break up of the south american and african plates in the late jurassic burke et al. On 1 february 2004, to mark world wetlands day, mali will announce the designation of the entire inner niger delta 4,119,500 hectares as a ramsar site. Sediments, offshore depobelt, niger delta, nigeria matthew o. Both structural and stratigraphy traps are common in the basin doust and omatsola, 1990. A key to making a full evaluation of the niger delta system has been the availability of longoffset 10km, longrecord 18s twt, regional seismic data that have been prestack depth migrated. Sequence stratigraphy and depositional environments of. Start this article has been rated as startclass on the projects quality scale. Northern delta, greater ughelli, central swamp, coastal swamp and. Nigeria is underlain by seven major sedimenta ry basins, viz. The coastal sedimentary basin of nigeria has been the scene of three depositional cycles.
During the tertiary it built out into the atlantic ocean at the mouth of the nigerbenue river system, an area of catchment that encompasses more than a million square kilometers of predominantly savannahcovered lowlands. In addition, the niger delta has natural gas reserves estimated at about 182 trillion cubic feet tcf ogj, 2005, making nigeria the largest natural gas endowed country in african and among top ten in the world. Each country within the basin has unique geographic settings and a wide. Geology and mineral resources of the lower benue trough, nigeria. The third cycle, from eocene to recent, marked the continuous growth of the main niger delta. The niger delta the nigerdelta area of nigeria coincides approximately to the southsouth geopolitical zone of the country fig i. One of the worlds largest deltas, the immense coastal. If you would like to participate, you can choose to edit this article, or visit the project page for more information. The niger delta basin is divided into five depobelts namely. This basin is very complex, and it carries high economic value as it. Evolution of the niger delta, present dynamics and the. The benue trough had been formed as part of the widely distributed african rift population which originated some 140 million years ago burke, 1996.
The cenozoic niger delta is situated on the continental margin of the gulf of guinea in the equatorial west africa. Modeling hydrocarbon generation potentials of eocene. Buhari approves executive management for river basin devt. Many of the nigeriaspan lines were also acquired using a deeptowed cable and source, which also helps to improve image quality. It is the most important in the west african continental margin. The niger delta is a classical example of a delta formation with a unique geological nature and high hydrocarbon petroleum production with over 1500 oil fields schlumberger, 1985. The study concluded that the onshore niger delta is characterized by a typical prograding delta architecture with a shallowingup pattern in which a series of strata consistently showed evidence of the younger beds being deposited in shallower water than the older beds they overlay. Delta field, niger delta, integration, stratigraphic mapping, structural interpretation, well logs. Geographically, the niger delta is the delta of niger river at the gulf of guinea on the atlantic ocean in nigeria. 211 220 december 2007 with 4,101 reads how we measure reads. As a sedimentary basin, the niger delta en compasses a region that is much larger than the geographical extent of the modern delta constructed by the nigerbenue drainage systems. The first began with a marine incursion in the middle cretaceous and was terminated by a mild folding phase in santonian time. Abstract lithofacies, depositional sequences and reservoir stratigraphy of the deep offshore field, otherwise. Purchase of an open document does not constitute license for republication in any form, nor does it allow web posting without prior written permission.
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