Wireline logs were employed to identify hydrocarbon bearing sand and compute reservoir petrophysical. Olayinka asseez the cretaceous and paleogene sediments of southern nigeria cornelius adedapo kogbe the geology of the middle niger basin d. An estimate of oil window in nigeria niger delta basin from recent studies j. Niger delta petroleum systems, nigeria petroleum systems. Emphasis is placed on the sedimentary and structural. American association of petroleum geologists studies in geology 27, 110. In the niger delta province, we have identified one petroleum systemthe tertiary niger delta akataagbada petroleum system. Stratigraphy and petroleum plays of the late to middle. Lateral variation in magnetic susceptibility and remanence give rise to spatial variations in the magnetic field it is expressed in so called magnetic anomalies, i. Maps showing the geological setting of the niger delta in a section 8. The niger delta basin is one of the largest subaerial basins in africa.
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. The main objective of this study is to perform geophysical. The study area is located onshore of the niger delta nigeria, it covers an area of 40,000 km2. The stratigraphic sequence of the niger delta comprises three broad lithostratigraphic units. Stratigraphy and sedimentology of the niger delta geologos. This basin is very complex, and it carries high economic value as it contains a very productive petroleum system. Mineralogical studies of tertiary subsurface sediments in the niger delta have shown that smectite, kaolinite, mixed. 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. This project is aimed at characterizing reservoirs to determine the petrophysical properties such as porosity, permeability and fluid saturation. Surface geology shown on the african plate, major cretaceous rift basins and breakup direction shown. The niger delta is ranked one of the major hydrocarbon provinces in the world.
The petroleum system of the niger delta is referred to as the tertiary niger delta akataagbada petroleum system fig. The geology of the tertiary niger delta province has been described by. Table 1 factors influencing connectivity and reservoir development in deltaic reservoirs. Geology of niger delta petroleum reservoir petroleum. Geology of niger delta a delta is a discrete shoreline protuberance formed at a point where a river enters an ocean or other. It is typically considered to be located within nine coastal southern nigerian states, which include.
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. Book chapter niger delta petroleum systems, nigeria authors. Sedimentological aspects of oil fields in the niger delta. Review of the stratigraphy, sedimentation and structure of the niger delta l. Given this large and diverse amount of geology, an attempt to. Regional integration of results from conventional exploration geochemistry, structural analysis, and gravitymagnetic data provide a comprehensive new understanding of niger delta petroleum systems. The tadelu field in western niger delta, nigeria, consists of a series of vertically stacked reservoirs in the agbada formation, thus making the field a complex sedimentary environment. Brownfield, 1999, the niger delta petroleum system.
Integration of seismic and petrophysics to characterize. The niger delta petroleum system usgs publications repository. Stratigraphy and petroleum plays of the late to middle oligocene sediments in the xy field, onshore niger delta basin, nigeria samuel okechukwu onyekuru abstract nigerias search for increased oil and gas reserves requires the discovery of additional petroleum plays using more accurate exploration techniques like sequence stratigraphy. Foraminifera biostratigraphy and paleoenvironment of well. Geological section through the sedimentary layers of the niger delta s mouth 9. Ekweozor and daukoru 1984, 1994 presented a detailed report on the petroleum geology and stratigraphy of the niger delta. A 2010 recipient of the prestigious aret adams award, bestowed by nape, dr. Niger delta gravitydriven deformation above the relict. Tuttlemlw, charpentier rr, brownfield me 1999 the niger delta basin petroleum system.
In this contribution the impact of oil exploration on the geological knowledge of this delta terrain is discussed. Reservoir description and characterization of eni field. Our publiclyowned company and its subsidiaries continually strive to establish an active partnership with the host communities in which we conduct our operations. Niger delta petroleum systems, nigeria, by richard c. Niger delta depositional sequence seismic attribute stratigraphic. The sedimentology has been analyzed with a focus on making predictions of the flow geology behavior for the offshore fields. Map of niger delta showing province outline maximum petroleum system. Field evaluation in a complex sedimentary environment is always tedious due to problems associated with imaging of the subsurface in such areas.
Geology and mineral resources of the lower benue trough. The current conflict in the niger delta first arose in the early 1990s over tensions between foreign oil corporations and a number of the niger delta s minority ethnic groups who feel they are being exploited, particularly the ogoni and the ijaw. Fatona is also a leading authority on the geology of the niger delta oil and gas province. The niger delta is the delta of the niger river sitting directly on the gulf of guinea on the atlantic ocean in nigeria. Niger delta province, nigeria, cameroon, and equatorial guinea, africa. An overview of the geology and hydrogeology of nigeria. Exploration of the small portions of the niger delta in cameroon and. Well logs, biostratigraphic data, seismic data and semblance map which together form a multidisciplinary data approach, were utilized in the geological evaluation of hydrocarbon prospect fobfield, onshore coastal swamp depobelt in the niger delta basin. Stratigraphy and sedimentology of the niger delta in. The oil and gas basins of africa spiral imperial college london. The geology of nigeria, as detailed in kogbe, is made up of three main rock. Reservoir description and characterization of eni field offshore niger delta, southern nigeria. Foraminifera biostratigraphy and paleoenvironment of well 5, oml 34, niger delta, nigeria. The delta formed at the site of a rift triple junction related to the opening of the southern atlantic starting in the late jurassic and continuing into the cretaceous.
Outcropping units of the niger delta include the imo formation and the ameki. Thickness of sediments in the niger delta averages 12 km covering a total area of about 140,000 km 2. Areas based on multitemporal satellite sar data and manual. 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. Structural and seismic facies interpretation of fabi field, onshore niger delta, nigeria kehinde oluwatoyin olowoyo dissertation. It has a subaerial area of about 75,000 km 2, a total area of 300,000 km 2, and a sediment fill of 500,000 km 3. Considerable geological information is available on the subsurface geology of the wetland niger delta from the activity and reports of the oil. 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. 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.
Clays from the recent delta have similar mineralogical compositions. About the series books editorial committee submit a book proposal author information. Reservoir characterization in o field in the niger delta. Equatorial guinea began much later than in nigeria. Pdf an overview of the geology and hydrogeology of nigeria. Agbada reservoirs, 71920101 allocation of undiscovered resources in the assessment unit to countries or other land parcels uncertainty of fixed but unknown values 1.
The niger delta system figure 1 is one of the worlds largest tertiary deltas and one of its most prolific hydrocarbon systems, containing an estimated 68 bboe and producing approximately 3 mmboe per day. Nigeria is the 12th largest producer of crude oil in the world. Proceedings of the ninth world petroleum congress 2, 209221. Niger delta petroleum systems, nigeria request pdf researchgate. The niger delta is one of the worlds largest tertiary delta systems and an extremely prolific. Request pdf niger delta petroleum systems, nigeria regional integration of results. The structure of the offshore niger delta geology department. Psintegrated reservoir quality study of deepwater clastic deposits, offshore western niger delta, nigeria c. Geological evaluation of hydrocarbon prospect of fobfield. Map showing the petroleum basins of west africa, including the niger delta and the salt basins to the. Niger delta petroleum systems, nigeria request pdf. The basin is deformed by large synsedimentaty faults, roll. Nigeria represents90 areal % of the total assessment unit. 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.
Stratigraphy and sedimentology of the niger delta 7 during the middlelate eocene, sediment was deposited fig. Integrated reservoir quality study of deepwater clastic. Source, depositional environment and maturity levels of. Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l. The niger delta is a classic example of a passive margin delta that has gravitationally deformed above an overpressured shale decollement.
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. Geology and mineral resources of the lower benue trough, nigeria. The niger delta region in the light of the theory of. The third cycle, from eocene to recent, marked the continuous growth of the main niger delta. Assessment of undiscovered petroleum in the tertiary niger delta. Descriptions of the petroleum geology of more than 12 basins along the two margins 2.
Course manual and atlas of structural styles on reflection profiles from the. An estimate of oil window in nigeria niger delta basin. Structural and seismic facies interpretation of fabi field. Source, depositional environment and maturity levels of some. Petroleum geology of the niger delta geological society, london. The outboard niger delta clastic wedge, including the akata formation overpressured shale decollement, is differentially thickened across relict oceanic basement steps formed at the chain and charcot fracture zones.
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