Radiogenic heat production from well logs in part of niger. However, the sedimentary successions in these basins are broadly divisible into. This study attempts to improve the sequence stratigraphic model of the region using wireline logs and biostratigraphic data. It lies on latitudes 40001n and 60031n and longitudes 40301e and 80301e. Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l. 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 sedimentology of the niger delta sciendo. Pdf an overview of the geology and hydrogeology of nigeria.
This is located within the niger delta basin and sits in 12 feet of water. Nigeria is underlain by seven major sedimenta ry basins, viz. This basin is very complex, and it carries high economic value as it contains a very. Estimation of reservoir potentials of two wells in niger. Southern niger delta basin of nigeria from potential field data eke, peter ogochuku, okeke, francisca nneka abstract. Fault analysis, stratigraphic discontinuities and 3d. Olayinka asseez the cretaceous and paleogene sediments of southern nigeria cornelius adedapo kogbe the geology of the middle niger basin d. Udoh 1,2department of geology, university of port harcourt, port harcourt, nigeria. 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.
The oil and gas basins of africa spiral imperial college london. Evaluation of the hydrocarbon maturity level of oil well. Sedimentological and stratigraphic analyses as a guide for reservoir. Sequence stratigraphic framework of the paradisefield. This was aimed at increasing the resolution for prediction of reservoir, seal, and source rocks in the eastern part of the basin. During the tertiary, the delta built out into the atlantic ocean at the mouth of the nigere. In the niger delta basin, quaternary age sediments underlying the delta plain consist. The niger delta basin lies within the gulf of guinea continental margin in equatorial west africa between. Geostatistical assessment of groundwater quality from. Map showing the petroleum basins of west africa, including the niger delta and the salt basins to. Nwajide introduction the niger delta basin occupies the gulf of guinea continental margin in equatorial west africa, between lats. Thermal state of the niger delta basin researchgate.
The topmost formation is the benin formation and is composed of coastal sandstones that are up to 2, 000 m thick in some regions. To the north, the niger delta is linked to the benue trough by the cretaceous anambra basin. Niger delta akataagbada petroleum system of9950h, chapter a. Sedimentation in the basin started in the late paleoceneeocene, when sediments. 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.
Abstract lithofacies, depositional sequences and reservoir stratigraphy of the deep offshore field, otherwise. Diagrammatic representation of the stratigraphic evolution of the niger delta. 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. Assessing wetland services in the niger delta, nigeria. 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. 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. Nov, 2015 8 the niger delta the niger delta province petroleum geology i ss 2014 fig. Oil and gas in the niger delta are primarily produced from sandstones and unconsolidated sands mainly in the agbada formation. 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. 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. Its drainage basin is 2,117,700 km2 817,600 sq mi in area. Map of nigeria, showing niger delta basin and the location of study area modified after whiteman, 1982. The depobelts in this basin form one of the largest regressive deltas in. Oil and gas in the niger delta are primarily produced from sandstones and unconsolidated sands mainly in the.
The weathering flanks of outcropping continental basement sourced the sediments through the benue niger drainage basin. Its development began after the eocene tectonic phase ekweozor and daukoru, 1994. Potential hydrocarbon regions in the southern region of the niger delta basin of nigeria have been identified from gravity and magnetic data. The delta consists of tertiary cenozoic sediments deposited. The niger and benue rivers are the main supplier of sediments. Geostatistical assessment of groundwater quality from coastal. Its source is in the guinea highlands in southeastern guinea.
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. Structural and stratigraphic mapping of delta field, agbada. The coastal sedimentary basin of nigeria has been the scene of three depositional cycles. International journal of geology, earth and environmental sciences issn. The niger delta is the youngest sedimentary basin within the benue trough system.
Structural section of the niger delta complex showing benin, agbada and akata. The creek had also supported some forms of industrial development, namely, an uncompleted 500 hectares fish farm owned by the niger delta basin development authority ndbda and bodo west oilfield. The delta has since paleocene times prograded a distance of more than 250 km from the benin and calabar flanks to the present delta front evamy et al. The cretaceous section has not been penetrated beneath the niger delta basin, the youngest and southernmost subbasin in the benueabakaliki trough reijers and others, 1997. Cenozoic calcareous nannofossil biostratigraphy of the niger delta. The cretaceous section has not been penetrated beneath the niger delta basin, the youngest and southernmost sub basin in the benueabakaliki trough reijers and others, 1997. 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. This paper presents the result of a sequence stratigraphic study on olu oilfield sediments in the niger delta. Each country within the basin has unique geographic settings and a wide. Stratigraphy and sedimentology of the niger delta in. During the following decades the temperature measurements in boreholes were an important element of the hydrocarbon prospecting. The tertiary niger delta covers an area of about 75,000 sq km and is composed of an overall regressive clastic sequence which reaches a maximum thickness of 30,000 to 40,000 ft 9,000 to 12,000 m.
Subsurface temperatures obtained from continuous temperature logs in 260 wells allowed to stabilize for several months were used in. Since then bodo creek had been precluded from chronic anthropogenic disturbances apart from fishing activities and logging pressure. Cenozoic foraminifera and calcareous nannofossil biostratigraphy. Engineering geology of the niger delta 77 the maximum depths to groundwater 710m are recorded in the m. The bida basin, which is one of the major inland sedimentary basins in nigeria, is oriented in the northwest southeastern direction and perpendicular to the main axis of the benue trough and the niger delta basin of nigeria fig. Anambra basin in what became the north ern depobelt of the niger delta figs 1, 3. Petroleum geology of the niger delta is described in evamy et al. A nigerian newspaper and online version of the vanguard, a daily publication in nigeria covering nigeria news, niger delta. 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.
In the tertiary niger delta basin exploration seismic for hydrocarbon is confined to the sedimentary section despite the. Many of the nigeriaspan lines were also acquired using a deeptowed cable and. The niger delta is situated in the gulf of guinea on the west coast of central africa fig. It is frequently regarded as the northwestern extension of the anambra basin to the southeast. 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. 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. During the tertiary it built out into the atlantic ocean at the mouth of the niger benue river system, an area of catchment that encompasses more than a million square kilometers of predominantly savannahcovered lowlands. Sequence stratigraphy and depositional environments of middle.
Porositypermeability regimes in reservoirs for hydrocarbon. Niger delta basin geology is part of wikiproject geology, an attempt at creating a standardized, informative, comprehensive and easytouse geology resource. Structural and stratigraphic mapping of delta field. The niger delta the nigerdelta area of nigeria coincides approximately to the southsouth geopolitical zone of the country fig i. Sediments, offshore depobelt, niger delta, nigeria matthew o. The delta field is located offshore from nigeria on oil mining leases oml 49 and 95. The niger delta is framed on the northwest by a subsurface continuation of the west african shield, the benin flank. Water quality of bodo creek in the lower niger delta basin.
The ideas expressed on location, geologic and tectonic setting is from. Review of the stratigraphy, sedimentation and structure of the niger delta l. The area of study lies within the coastal swamp depobelt in oml of the eastern part of the niger delta petroleum province. It is situated at the right bank of the bonny river approximately 65km inland from the bight of bonny. The study area is located within the niger delta sedimentary 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. Up to 12km of deltaic and shallow marine sediments have been accumulated in the basin. The niger delta covers an area of approximately 75,000km. The first began with a marine incursion in the middle cretaceous and was terminated by a mild folding phase in santonian time.
It runs in a crescent through mali, niger, on the border with benin and then through nigeria, discharging through a massive delta, known as the niger delta or the oil rivers, into the gulf of guinea in the atlantic ocean. Stratigraphy and sedimentology of the niger delta 7 during the middlelate eocene, sediment was deposited fig. King hubbert, working with the shell, in his famous 1956 paper nuclear energy and the fossil fuel predicted that texas us oil production would peak in 1965, if the assumed. In 1965, the delta 1 well was completed and the delta field opened in 1968 for production. 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.
Geological section through the sedimentary layers of the niger deltas mouth 9. If you would like to participate, you can choose to edit this article, or visit the project page for more information. The tertiary niger delta covers an area of about 75,000 km2 and is composed of an overall regressive clastic sequence which reaches a maximum thickness of 30,000 to 40,000 ft 9,000 to 12,000 m evamy et al. The niger delta is ranked among the worlds major hydrocarbon provinces in the world. 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. The benin formation is the topmost lithostratigraphy and it is a continental deltaic sands. S1 abstract the niger delta, an area of roughly 30,000km2, is experiencing physical development challenges due to poor soil conditions, a situation which has escalated project cost and as a consequence impeded development. Apr 30, 2009 the niger delta started to evolve in early tertiary times when clastic river input increased doust and omatsola, 1989. Both structural and stratigraphy traps are common in the basin doust and omatsola, 1990. 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. The niger delta basin is characterized with shale diapirs, growth faults and associated rollover anticlines. Figure 1 is a map of the niger delta showing study area.
The study adopted both field and laboratory based analytical procedures to generate the data required. Stratigraphy and petroleum plays of the late to middle. The middle to late miocene sequence of the niger delta basin can be said to be among the most challenging targets. Sequence stratigraphy of the niger delta, delta field, offshore nigeria. The niger delta is situated on the gulf of guinea on the west coast of central africa figure 1. It is the most important in the west african continental margin. An estimate of oil window in nigeria niger delta basin. The lithic fill of the niger delta basin ranges from the facies of the first major cenozoic transgression to the depositional products of the present day, as well as materials eroded from subsurface and outcropping formations fig.
Geoligical section through the agbadaakataformation showing sedimentary deposits and time. The thermal state of the niger delta basin is presented. An estimate of oil window in nigeria niger delta basin from. Lithologies of cretaceous rocks deposited in what is now the niger delta basin can only be extrapolated from the exposed cretaceous section in the next basin to the. The niger delta development began after the eocene tectonic phase. Sequence stratigraphy and depositional environments of. The basin and composed mainly of paralic siliclastics. 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. Pdf porosity modelling was carried out in two oilwells of stacked reservoirs in the molog field in. Start this article has been rated as startclass on the projects quality scale.
Stratigraphic column showing the three formations of the niger delta. Given this large and diverse amount of geology, an attempt to. Many of the nigeriaspan lines were also acquired using a deeptowed cable and source, which also helps to improve image quality. 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 niger delta started to evolve in early tertiary times when clastic river input increased doust and omatsola, 1989. Map of the niger river basin, showing the four sub basins.
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 interpretation of the olu oilfield. Regional development in the hydro geology of the chad. Depobelt and structural play map of the niger delta basin showing the study area. Formation evaluation of an onshore oil field, niger delta.