Niger delta petroleum systems, nigeria petroleum systems. The niger delta is a prolific oil province within the west african subcontinent. The predrift fit of south america into the gulf of guinea is well known1. Mineralogical studies of tertiary subsurface sediments in the niger delta have shown that smectite, kaolinite, mixed. A sequence of undercompacted marine clays, overlain by paralic deposits, in turn covered by continental sands, is present throughout, builtup by the imbricated super position of numerous offlap cycles. The structure of the offshore niger delta tional accommodation on the slope in the inner fold and thrust belt, as well as distal contraction in the outer fold and thrust belt. Nov, 2015 7the niger delta province petroleum geology i ss 2014 facies distribution of the niger delta fig. Outcropping units of the niger delta include the imo formation and the ameki group. Some of the other natural resources are gypsum, salt and phosphates. Information on the geological setting of the niger delta has been well published nwajide, 2006. The metallic resources include gold, tin, uranium, iron ore and molybdenum.
Paleoenviromental and sequence stratigraphic studies. 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. This was aimed at increasing the resolution for prediction of reservoir, seal, and source rocks in the eastern part of the basin. These tracemetal data, together with the organic geochemistry and physical properties of the oil indicate that the niger delta source rocks contain predominately. The sedimentary basins comprises of 7 inland basins namely the niger delta, the anambra basin, the benue trough, the chad basin, the sokoto basin, the bidanupe basin and the. The ideas expressed on location, geologic and tectonic setting is from. The first began with a marine incursion in the middle cretaceous and was terminated by a mild folding phase in santonian time. The thickness of the basin ranges between 1012km and it is. This basin is very complex, and it carries high economic value as it contains a very. Opening of the gulf of guinea and geological history of the.
The sedimentary basin occupies a total area of about 75,000 km 2 and is at least 11 km deep in its deepest parts. Contains details on the geological units of nigeria and the associated mineral resources. Well sections in the niger delta indicate three vertical lithostratigraphic subdivisions. There are some natural hazards in the country of niger, one of which is the recurring occurrences of drought. The river niger and the asaba plateau with its undulating. The niger delta basin, also referred to as the niger delta province, is an extensional rift basin. The structure of the offshore niger delta geology department. Niger delta petroleum systems, nigeria petroleum systems of. The coast is 50 km landward of its position during pleistocene lowstands because of a eustatic rise in sea level of about 90 m in the last 75,000 years. Static reservoir modeling using well log and 3d seismic data.
Static reservoir modeling using well log and 3d seismic. Download the complete project topic and material chapter 15 titled determination of the sedimentological and geochemical characteristics of the sediment in the niger delta basin here on iprojecttopics. Niger has fossil fuels which includes deposits of petroleum and coal. We suggest that the distinctive rightangled bends of the south american and. Stratigraphy and sedimentology of the niger delta sciendo. 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. 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. Petrophysical evaluation and volumetric estimation within.
The niger delta basin, situated at the apex of the gulf of guinea on the west coast of africa, is one of the most prolific deltaic hydrocarbon provinces in the world figure 1. P3 1,2department of geology, university of port harcourt, port harcourt, nigeria 3 department of petroleum engineering, nigerian agip oil company, port harcourt, nigeria abstract. Niger delta is a prolific hydrocarbon belt in the world. Clays from the recent delta have similar mineralogical compositions. Source, depositional environment and maturity levels of some. Multivariate statistical analysis was employed to distinguish generic oil families from the large, complex data set. See below for the abstract, table of contents, list of figures, list of tables, list of appendices, list of abbreviations and chapter one. The niger delta started to evolve in early tertiary times when clastic river input increased doust and omatsola, 1989. Within the delta the river breaks up into an in nigeria. Geology and mineral resources of nigeria nuhu george. It is typically considered to be located within nine coastal southern nigerian states, which include. It has an aerial extent of 75,000 km 2 and a total estimated area of 300,000 km 2.
Maps showing the geological setting of the niger delta in a section 8. Pdf porosity modelling was carried out in two oilwells of stacked reservoirs in the molog field in. The niger delta has three major depositional prisms. Niger delta course manual and atlas of structural styles. Part 1 discusses the geology of the crystalline rocks and their regional distribution while the sedimentary basins constitute the subject of part 2. Geological section through the sedimentary layers of the niger deltas mouth 9. The area is characterized by a mosaic of floodplain deposits and. Considerable geological information is available on the subsurface geology of the wetland niger delta. Kurowska university of silesia department of fundamental geology sosnowiec poland abstract 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. 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. Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l.
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. The tertiary petroleum system of the niger delta has most recently been discussed in papers by ekweozor and daukoru 1994 and stacher 1995. 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. A considerable amount of new information, however, has become available since publication of those papers, including penetration of a tertiary oilprone source rock sequence in aroh2 well. 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. The area forms part of a geological sequence of the quaternary and tertiary formations of the niger delta, consisting mainly of three main geologic formations. Mineral studies of the subsurface niger delta odigi. Sequence stratigraphy and depositional environments of middle. The niger delta basin occupies the gulf of guinea continental margin in.
Department of geology, university of nigeria, nsukka, enugu state, nigeria email. The niger delta is situated in the gulf of guinea and extends throughout the niger delta province. At present, it appears to be constructive in the center and destructive on either flank figure 2. Stratigraphic evolution of the tertiary niger delta and underlying cretaceous strata is described by. Sequence stratigraphic framework of the paradise field niger delta, nigeria.
Rahaman preliminary report on the field relationships of the basement complex rocks around igarra, midwest i. Journal of earth sciences and geotechnical engineering. An estimate of oil window in nigeria niger delta basin. The niger delta petroleum system usgs publications repository. Niger delta geographical region, africa britannica. Case study of field x, niger delta kelechi azubuike ijomah1, beka f. Geologic map of the niger delta showing depobelts and structural elements.
Kurowska university of silesia department of fundamental geology sosnowiec poland abstract niger delta sedimentary basin is a large arcuate delta of the destructive dominated wave type that has been explored for. An estimate of oil window in nigeria niger delta basin from. It is part of the niger delta province which occurs at the southern part of nigeria bordering the atlantic ocean. The niger is the thirdlongest river in africa, exceeded only by the nile and the congo river also known as the zaire river. The coastal sedimentary basin of nigeria has been the scene of three depositional cycles. Generally the delta prograded over the subsidizing continentaloceanic lithospheric transition zone, and during the oligocene spread onto oceanic crust of the gulf of guinea adesida et al. Petroleum geology of the niger delta abstract the niger delta is a large, arcuate delta of the destructive, wavedominated type. The niger delta is a typical waveand tidaldominated delta. We suggest that the distinctive rightangled bends of the south american and african coasts result from three cretaceous. E located in the southern part of nigeria and is situated in the gulf of guinea and extends into the central south atlantic ocean at the mouths of the niger benue and cross river systems.
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. Its development began after the eocene tectonic phase. Course manual and atlas of structural styles on reflection profiles from the niger delta. The coast is 50 km landward of its position during pleistocene lowstands because of a eustatic rise in sea level of about 90 m in the last 75,000 years nedeco, 1959. Shaw department of geology, imperial college, prince consort road, london sw7, uk received 26 june 1981 a b s t r a c t. Benin formation which is an upper delta top lithofacies consisting of massive continental sands and gravels, grades downwards into delta front lithofacies of the agbada formation. Doc geology of nigeria vincent kalu and stanless pee. Structural and seismic facies interpretation of fabi field. Delta state, figure 1, falls approximately between latitude 6 040i 6 015in and longitude 6 040ie 6 045ie, is bound on the east and north east by the river niger and on the west by the rolling slopes of the asaba plateau. Therefore galloways approach is preferred here for deltawide stratigraphic correlation.
Structural section of the niger delta complex showing benin, agbada and akata formations short. Niger delta is the youngest sedimentary basin within the benue trough system. The niger delta is a vast lowlying region through which the waters of. Formation evaluation of an onshore oil field, niger delta. Opening of the gulf of guinea and geological history of. Benin formation which is an upper delta top lithofacies consisting of massive continental sands and gravels, grades downwards into. Exploration activities have been concentrated in the onshore part of this basin but as the delta becomes better understood. Sediments of the tertiary akata and agbada formations have been studied by mineralogical and petrographic techniques. The niger delta region in the light of the theory of. Niger delta akataagbada petroleum system of9950h, chapter a. The niger delta is the delta of the niger river sitting directly on the gulf of guinea on the atlantic ocean in nigeria.
Stratigraphy and sedimentology of the niger delta 5 wide genetic sequences as defined by galloway 1989 and consisting of strata bounded by maximum flooding surfaces within transgressive shales are more readily identifiable in the niger delta. 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. Summary of the geology of the study area the studied area is located in parts of the onshore zone in the niger delta sedimentary basin, nigeria fig. International journal of geology, earth and environmental sciences issn. This paper attempts to determine whether there is a genuine misfit at this point or whether the delta may have grown beyond the continental margin after the continents separated. The depobelts in this basin form one of the largest regressive deltas in.
Engineering geology of the niger delta 77 the maximum depths to groundwater 710m are recorded in the m. A recently computed fit of the african and south american continents is astonishingly close, apart from an overlap of some 120 miles in the vicinity of the niger delta. The subsurface geology of delta state which is part of the niger delta basin is depicted in figure 1. Source, depositional environment and maturity levels of.
The province covers 300,000 km2 and includes the geologic extent of the tertiary niger delta akataagbada petroleum system. Figure 2 is a 275 km, prestack depth migrated and interpreted seismic line across the offshore niger delta that extends from the shelf to the basin floor. Pd 41 petroleum geology of the niger delta onepetro. It lies in the south western part of the benue trough, which is a much bigger tectonic. Geology department ahmadu bello university zaria, nigeria e. Sequence stratigraphy and depositional environments of. The formation of niger delta basin was initiated in the early tertiary time. The niger delta basin is located in the gulf of guinea on the west coast of africa. Odeyemi intermediate rocks from older granite complexes. Stratigraphy and sedimentology of the niger delta in. Sequence stratigraphic framework of the paradisefield. Geologic map of the niger delta basin and the benue trough, and the oil fields in the region. 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.
1226 1426 1524 33 552 1022 32 1520 1527 1230 1481 575 537 278 720 1465 336 571 939 1560 1324 1095 952 739 1473 988 1343 1368 656 1274 210