Geology and mineral resources of the lower benue trough. 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. The benin formation is the topmost lithostratigraphy and it is a continental deltaic sands. Stratigraphic column showing the three formations of the niger delta. 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. Diagrammatic representation of the stratigraphic evolution of the niger delta. A nigerian newspaper and online version of the vanguard, a daily publication in nigeria covering nigeria news, niger delta. 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 marine and. 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. Stratigraphy and sedimentology of the niger delta sciendo. Ten countries form part of the river basin, and flow is somewhat controlled by dams which provide water for irrigation and hydropower. Pdf porosity modelling was carried out in two oilwells of stacked reservoirs in the molog field in. 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.
The depobelts in this basin form one of the largest regressive deltas in. One of the worlds largest deltas, the immense coastal. Stratigraphic section of the anambra basin from the late cretaceous through the eocene. The benue trough had been formed as part of the widely distributed african rift population. Weathered layer delineation in an x field in the niger delta basin of nigeria.
The niger delta, which stretches for nearly 150 miles 240 km from north to south and spreads along the coast for about 200 miles 320 km, extends over an area of 14,000 square miles 36,000 square km. In 1965, the delta 1 well was completed and the delta field opened in 1968 for production. Radiogenic heat production from well logs in part of niger. To the north, the niger delta is linked to the benue trough by the cretaceous anambra basin. The niger delta basin is characterized with shale diapirs, growth faults and associated rollover anticlines. The niger delta basin, also referred to as the niger delta province, is an extensional rift basin. The coastal sedimentary basin of nigeria has been the scene of three depositional cycles. Within the delta the river breaks up into an in nigeria. 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. 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 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. Sequence stratigraphic analysis of each of the six 6 well log suites from the xy field in the greater ughelli depobelt, niger delta basin was achieved by the integration of biostratigraphic information stratigraphic markers and lithological data distilled out from the wireline log suites using the approach of. Udoh 1,2department of geology, university of port harcourt, port harcourt, nigeria. Nov 28, 2017 the niger delta basin is located within the perioceanic section of the abakalikibenue suture zone of the much larger southern nigerian basin. From the eocene to the present, the delta has prograded southwestward, forming depobelts that represent the most active portion of the delta at each stage or its development. Neogene intraslope basins, offshore western niger delta. It lies on latitudes 40001n and 60031n and longitudes 40301e and 80301e. The niger delta basin is located on the continental margin of the gulf of guinea in equatorial west africa and lies between latitudes 4 o oand 7 n and longitudes 3 o and 9 o e whiteman, 1982. Abstract lithofacies, depositional sequences and reservoir stratigraphy of the deep offshore field, otherwise.
Structural section of the niger delta complex showing benin, agbada and akata formations. Many of the nigeriaspan lines were also acquired using a deeptowed cable and. Estimation of reservoir potentials of two wells in niger. Sequence stratigraphy and depositional environments of.
Mar, 2015 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. 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 l2. Assessing wetland services in the niger delta, nigeria. This was aimed at increasing the resolution for prediction of reservoir, seal, and source rocks in the eastern part of the basin. Geoligical section through the agbadaakataformation showing sedimentary deposits and time. The study area is located within the niger delta sedimentary basin. The benue trough is arbitrarily subdivided into three portions.
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 is framed on the northwest by a subsurface continuation of the west african shield, the benin flank. Many of the nigeriaspan lines were also acquired using a deeptowed cable and source, which also helps to improve image quality. 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 fundamental causative event for the origin of the niger delta basin was the breakup of the gondwana supercontinent. The quality of groundwater in the coastal aquifer of eastern niger delta has been assessed in the present study using geostatistical techniques. Petroleum geology of the niger delta is described in evamy 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. Stratigraphy and petroleum plays of the late to middle. Geostatistical assessment of groundwater quality from. The delta field is located offshore from nigeria on oil mining leases oml 49 and 95. Sequence stratigraphic analysis of each of the six 6 well log suites from the xy field in the greater ughelli depobelt, niger delta basin was achieved by the integration of biostratigraphic information stratigraphic markers and lithological data distilled out from the wireline log suites using the approach of 5. The benue trough had been formed as part of the widely distributed african rift population which originated some 140 million years ago burke, 1996. During the cenozoic, until the middle miocene, the niger delta grew through pulses of sedimentation. The thermal state of the niger delta basin is presented. 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. Only after the benue river, joins the river in nigeria does it become a large river once more. The benin basin is a sedimentary basin that was initiated during the mesozoic in response to the separation of the africansouth american landmasses and the subsequent opening of the atlantic. Weathered layer delineation in an x field in the niger.
Application of seismic sequence stratigraphy to exploitation of oil and gas in x field of niger deltanigeria 1inikoe. The first began with a marine incursion in the middle cretaceous and was terminated by a mild folding phase in santonian time. Seismic stratigraphy and depositional architecture of neogene. Thermal state of the niger delta basin researchgate. Niger delta geographical region, africa britannica.
Depobelt and structural play map of the niger delta basin showing the study area. The reservoir temperature data from arpr file had already been converted. What links here related changes upload file special pages permanent link page. The niger delta covers an area of approximately 75,000km.
Sediment deposition in this area started in early miocene times and the sedimentary package is comprised of the basal holomarine shales akata formation, the coastal plain sandshale alternations agbada formation, and coastal plain sands benin formation being the youngest. Integrating airborne magnetic and landsat data for. A nigerian newspaper and online version of the vanguard, a daily publication in nigeria covering nigeria news, niger delta, general national news, politics, business, energy, sports. Both structural and stratigraphy traps are common in the basin doust and omatsola, 1990. The niger delta is the youngest sedimentary basin within the benue trough system. The niger delta basin is located within the perioceanic section of the abakalikibenue suture zone of the much larger southern nigerian basin. Outcropping units of the niger delta include the imo formation and the ameki group. This is located within the niger delta basin and sits in 12 feet of water. Its development began after the eocene tectonic phase ekweozor and daukoru, 1994.
The area is characterized by a mosaic of floodplain deposits and. 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. 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. Geological section through the sedimentary layers of the niger deltas mouth 9. Structural and stratigraphic mapping of delta field. 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. Sequence stratigraphy of the niger delta, delta field, offshore nigeria. On the west, it is separated from the dahomey or benin basin by the okitipupa basement high, and on the east it is bounded by the cameroun volcanic line. Sediments, offshore depobelt, niger delta, nigeria matthew o. The niger delta is a wavedominated delta located on the continental margin of the gulf of guinea that formed in the paleogene. An estimate of oil window in nigeria niger delta basin. The niger delta is a vast lowlying region through which the waters of. Formation evaluation of an onshore oil field, niger delta. Evolution of the niger delta, present dynamics and the.
Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l. The range, standard deviation and variance of the dataset show that multichemical processes are controlling the groundwater qualityfacies and their spatial distributions. The niger delta basin is located on the continental margin of the gulf of guinea in equatorial west africa and lies between latitudes 4 o oand 7 n and longitudes 3 o. The niger delta sedimentary basin of nigeria contains more than 12km of. Outline of geology of niger delta 1 geoscienceworld. This is a pdf file of an unedited manuscript that has been accepted for publication. During the following decades the temperature measurements in boreholes were an important element of the hydrocarbon prospecting. Subsurface temperatures obtained from continuous temperature logs in 260 wells allowed to stabilize for several months were used in. The niger delta petroleum system usgs publications repository. 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. The ideas expressed on location, geologic and tectonic setting is from. Stratigraphy and sedimentology of the niger delta 7 during the middlelate eocene, sediment was deposited fig. The niger delta the nigerdelta area of nigeria coincides approximately to the southsouth geopolitical zone of the country fig i. Fault analysis, stratigraphic discontinuities and 3d.
Nwajide introduction the niger delta basin occupies the gulf of guinea continental margin in equatorial west africa, between lats. Sequence stratigraphic approach to hydrocarbon exploration. The middle to late miocene sequence of the niger delta basin can be said to be among the most challenging targets. Department of geology of the anambra state university uli, for their concern, prayers. The delta consists of tertiary cenozoic sediments deposited. International journal of geology, earth and environmental sciences issn. Figure 1 is a map of the niger delta showing study area. Map of the niger river basin, showing the four sub basins. However, the sedimentary successions in these basins are broadly divisible into.
During the tertiary, the delta built out into the atlantic ocean at the mouth of the niger e. The anambra basin underlies the delta basin and both are demarcated by an. The niger delta is situated in the gulf of guinea on the west coast of central africa fig. Marine and petroleum geology, elsevier, 2019, 109, pp. This basin is very complex, and it carries high economic value as it contains a very. During the tertiary, the delta built out into the atlantic ocean at the mouth of the nigere.
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