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. Reservoir geology and sequence stratigraphy of deep water sediments, offshore depobelt, niger delta, nigeria matthew o. Oil and gas in the niger delta are primarily produced from. The niger delta basin has area coverage of about 75,000 km 2 and consists of an overall regressive clastic sequence which reaches a maximum thickness of about 12,000 m in the central part of the basin where there is maximum subsidence merki 1972. They contain significant volumes of hydrocarbons worldwide. According to opafunso 6 the niger delta itself lies between longitudes 5o 00. The megachad basin is a large continental basin in the central west africa figure 1 that covers a total area of about 2,335,000km2 11. 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. Major petroleum provinces include the niger delta in west africa, the mahakam delta in borneo, the caspian sea, and the maracaibo basin in venezuela. The third cycle, from eocene to recent, marked the continuous growth of the main niger delta.
Nov, 2015 7the niger delta province petroleum geology i ss 2014 facies distribution of the niger delta fig. The niger delta sedimentary basin of nigeria contains more than 12km of. Original paper exploration geology depositional environment and reservoir quality assessment of the bruks field, niger delta ayonma w. 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 niger benue drainage systems. See below for the abstract, table of contents, list of figures, list of tables, list of appendices, list of abbreviations and chapter one. The depobelts in this basin form one of the largest. International journal of geology, earth and environmental sciences issn. Stratigraphic setting the stratigraphy of the niger delta is a direct. Pdf porosity modelling was carried out in two oilwells of stacked reservoirs in the molog field in. The first began with a marine incursion in the middle cretaceous and was terminated by a mild folding phase in santonian time.
During the cenozoic, until the middle miocene, the niger delta grew through pulses of sedimentation over an ocean. The reservoir temperature data from arpr file had already been converted. The tripartite stratigraphy of the niger delta basin consists of the akata, the agbada, and the benin formations. According to 2,todays niger delta basin starts from idah and can be mapped in an area about halfway between enugu and onitsha which is somewhere around the oji river bridge. The niger delta basin, also referred to as the niger delta province, is an extensional rift basin. It is the most important in the west african continental margin. The ideas expressed on location, geologic and tectonic setting is from. Sequence stratigraphy and depositional environments of middle. Petroleum geology of the niger delta abstract the niger delta is a large, arcuate delta of the destructive, wavedominated type. This was aimed at increasing the resolution for prediction of reservoir, seal, and source rocks in the eastern part. The niger delta development began after the eocene tectonic phase.
Tertiary niger delta akataagbada petroleum system no. The niger delta basin is one of the most prolific hydrocarbon provinces in the world, yet the origin of the vast amounts of oil and gas found in the numerous subbasins across the delta remains contested. Stratigraphy and petroleum plays of the late to middle. Sequence stratigraphy and depositional environments of. Sequence stratigraphy of the niger delta, delta field, offshore nigeria. The delta field is located offshore from nigeria on oil mining leases oml 49 and 95. It lies on latitudes 40001n and 60031n and longitudes 40301e and 80301e. Jul 21, 2016 a trap is a geologic structure or phenomenon that stops the movement of hydrocarbon in reservoir rocks and enable hydrocarbon to accumulate in pools most traps in the niger delta are structural traps i. 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. A maximum thickness of about 12,000 m of sedimentary rocks is attained in the offshore western niger delta, but maximum thicknesses of sedimentary rocks are about 2,000 m in the chad basin and only 500 m in the sokoto embayment.
The rdr basin is a passive margin basin present in the gulf of guinea and it is located southeast of niger delta over an area of about 7,000 km2 offshore. However, the sedimentary successions in these basins are broadly divisible into. 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 shales contain significant amount of organic matter and may be a potential source for the hydrocarbons in the northern part of the niger delta reijers and nwajide, the lithologic composition of the asu river group comprises limestones, shales, micacous siltstones, mudstones and clays offodile. Outcropping units of the niger delta include the imo formation and the ameki. Basement geology in the sedimentary basins of nigeria. Jun 16, 2019 geology of nigeria by kogbe pdf the gboko limestone, yandev, benue state, nigeria. Department of geology of the anambra state university uli, for their concern, prayers. During the tertiary, the delta built out into the atlantic ocean at the mouth of the nigere. Much palynological work has been done in this basin but there is little. Stratigraphy and sedimentology of the niger delta in. Stratigraphic section of the anambra basin from the late cretaceous through the. Delta is the interbedded shale within the agbada formation duncan.
The thickness of the basin ranges between 1012km and it is. Here, the nsukka formation is overlain by the imo formation which is the basal unit of the niger delta sedimentary package. Late miocene to early pliocene palynostratigraphy and. These differences are thought to be related to geothermal gradients, environments of deposition, source materials, pore. This thesis follows the style and format of the aapg bulletin. 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. Mineral studies of the subsurface niger delta odigi. Most of the wells that penetrated the basement are in the eastern dahomey embayment of western nigeria. Department of geology, university of port harcourt, nigeria abstract. Engineering geology of the niger delta 67 sediments originating from the vast catchment area and geologic ally com plex hinterland fig.
Regional setting of niger delta basin after emery et al. Several workers have studied the anambra basin and niger delta in terms of sedimentology, stratigraphy and sequence stratigraphic concepts nwajide and reijers 1996. The fundamental causative event for the origin of the niger delta basin was the breakup of the gondwana supercontinent. The basin straddles five countries, namely, nigeria, niger, chad republic, cameroon and central africa republic.
The northern boundary is the benin flank an eastnortheast trending hinge line south of the west africa basement massif. Geological section through the sedimentary layers of the niger deltas mouth 9. Nov 21, 2017 the tertiary niger delta basin located in southern nigeria at the inland margin of the gulf of guinea is situated at the southernmost extremity of the elongated intracontinental benue trough. Geology and stratigraphic setting of the niger delta basin firs adediran et al. A trap is a geologic structure or phenomenon that stops the movement of hydrocarbon in reservoir rocks and enable hydrocarbon to accumulate in pools most traps in the niger delta are structural traps i.
Doc geology of nigeria vincent kalu and stanless pee. The coastal sedimentary basin of nigeria has been the scene of three depositional cycles. 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. Geology and mineral resources of the lower benue trough, nigeria. Stratigraphy and sedimentology of the niger delta 7 during the middlelate eocene, sediment was deposited fig.
Evaluation of the hydrocarbon maturity level of oil well. 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. Abstract in the niger delta province, we have identified one petroleum systemthe tertiary niger delta akataagbada petroleum system. The niger and benue rivers are the main supplier of sediments. Pd 41 petroleum geology of the niger delta onepetro. Maps showing the geological setting of the niger delta in a section 8. Diagrammatic representation of the stratigraphic evolution of the niger delta. Introduction the niger delta is ranked among the worlds major hydrocarbon provinces in the world. 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. Purchase of an open document does not constitute license for republication in any form, nor does it allow web posting without prior written permission. Depobelt and structural play map of the niger delta basin showing the study area. Niger delta akataagbada petroleum system of9950h, chapter a.
The basin consists of progradational, paralic sequences of akata, agbada and benin formations which builds. 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 sokoto basin nigerian sector of the iullemmeden basin. The onshore portion of the niger delta province is delineated by the geology of southern nigeria and southwestern cameroon. This author studied the depositional model of the outcrops along iseleazagbaonitshaakwa areas of the northern niger delta and anambra basins. Delta field, niger delta, integration, stratigraphic mapping, structural interpretation, well logs. The niger delta is a wavedominated delta located on the continental margin of the gulf of guinea that formed in the. An estimate of oil window in nigeria niger delta basin from.
Predicting petroleum generation is a critical issue in prospect evaluation for the deeper prospects because of its economic implications. Map of the niger river basin, showing the four sub basins. Geology department ahmadu bello university zaria, nigeria e. In 1965, the delta 1 well was completed and the delta field opened in 1968 for production. The benue trough had been formed as part of the widely distributed african rift population which originated some 140 million years ago burke, 1996. Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l. Reservoir description and characterization of eni field.
Surface geology shown on the african plate, major cretaceous rift basins and breakup direction shown. It is situated between latitudes 3 and 6n and longitudes 5 and 8e fig. Each country within the basin has unique geographic settings and a wide. Depositional environment and reservoir quality assessment. Geology and mineral resources of nigeria ebook, 2009. Stratigraphic column showing the three formations of the niger delta. Thermal maturity evaluation and prediction of petroleum generation. Structural section of the niger delta complex showing benin, agbada and akata formations. Structural and stratigraphic mapping of delta field. Its development began after the eocene tectonic phase. This is located within the niger delta basin and sits in 12 feet of water.
During the tertiary, the delta built out into the atlantic ocean at the mouth of the niger e. The niger delta basin ranks among the worlds most prolific petroleum. Stratigraphic setting of niger delta free pdf file sharing. The south western sector of the megachad basin, known as the bornu. Geology of the niger delta the niger delta is the youngest sedimentary basin within the benue trough system. 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. Niger delta is the youngest sedimentary basin within the benue trough system. The niger delta petroleum system usgs publications repository. The niger delta is situated in the gulf of guinea on the west coast of central africa fig. The benue trough is arbitrarily subdivided into three portions. This was aimed at increasing the resolution for prediction of reservoir, seal, and source rocks in the eastern part of the basin. Formation evaluation of an onshore oil field, niger delta. 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 study area, a1 reservoir sand, boga field, niger delta is located within the greater ughelli depobelt of the niger delta region. Course manual and atlas of structural styles on reflection profiles from the niger delta. Geology and mineral resources of the lower benue trough. Heavy minerals and geochemical characteristics of sandstones. 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. Stratigraphy and sedimentology of the niger delta sciendo. 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.
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