Sequence stratigraphy, kafe1 field, western niger delta, systems tract, well correlation i. Stratigraphic analysis, niger delta, depositional environment, depositional sequences, sequence boundaries, systems tracts, maximum flooding surfaces introduction the niger delta is a major hydrocarbon provinces in the world petroconsultants, 1996. 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. 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 of its development doust and omatsola, 1990. The niger delta is situated in the gulf of guinea on the west coast of central africa. Application of seismic stratigraphy and structural analysis in the determination of petroleum plays within the eastern niger delta basin, nigeria d. The major structural elements delimiting the niger delta basin into two segments are the benin hinge line bhl an extension of the. Short and stauble 1967 presented a detailed work on the subsurface stratigraphy of the niger delta and subdivided the sequences into three lithostratigraphic units. 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. Survey editorial standards or with the north american stratigraphic code. Sequence stratigraphy and depositional environments of.
The structural and sequence stratigraphy of an onshore field, niger delta has been analysed from seismic and biostratigraphy data in order to assess the hydrocarbon potential of the area. Stratigraphic evolution of the tertiary niger delta and underlying cretaceous strata is described by. Such a new lithostratigraphy is badly needed, in particular because of the vigorous new activity in the offshore part of the niger delta not covered in. Sequence stratigraphic framework of the paradise field niger delta, nigeria. The niger delta basin is situated on the continental margin of the gulf of guinea in equatorial west. Structural and stratigraphic mapping of delta field. The niger delta basin lies between latitude 40000n and 60000n and longitude 50000e and 80000e. The basin is deformed by large synsedimentaty faults, roll. Several works carried out in the niger delta have revealed the tectonic history, sedimentology, stratigraphy, depositional environments and the petroleum potential of the basin 8,9,10,11,12, 14.
Introduction the niger delta is ranked among the worlds major hydrocarbon provinces in the world. 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, biostratigraphy, sedimentology, megasequences, cycles 1. The coastal sedimentary basin of nigeria has been the scene of three depositional cycles. Sediments, offshore depobelt, niger delta, nigeria matthew o. Controls on depositional systems and sequence stratigraphy of. Seismic, structural interpretation, well logs, niger delta, stratigraphic mapping, integration. Stratigraphy and sedimentology of the niger delta in. Udoh 1,2department of geology, university of port harcourt, port harcourt, nigeria. The geology of the tertiary niger delta province has been described by several researchers. A spectral method of segmenting well data into its main rock stratigraphic units in niger delta correlation, or a combination of both cannot ensure geologically meaningful correlation. From a panoramicview across the onitshaenugu express way, the lenticular umunya section is observed to comprise three subunits. Various works have been carried out in relation to the sequence stratigraphy of different parts of the niger delta. The drainage density is very high and has given rise to an intricate drainage texture.
The niger delta of nigeria is situated in the gulf of guinea between longitude 5. These sand bodies have good reservoir quality, while the heterolithics have reservoir quality and act as baffles to vertical flow of hydrocarbon. Stratigraphic setting of niger delta free pdf file sharing. The delta field is located offshore from nigeria on oil mining leases oml 49 and 95. The fundamental causative event for the origin of the niger delta basin was the breakup of the gondwana supercontinent. Structurally the delta is subdivided into several depobelts from the northern delta to the deep offshore delta. A new threefold lithostratigraphic subdivision is in troduced for the niger delta subsurface, comprising an upper sandy benin formation, an intervening unit of. Sequence stratigraphic approach to hydrocarbon exploration. Therefore galloways approach is preferred here for deltawide stratigraphic correlation. In 1965, the delta 1 well was completed and the delta field opened in 1968 for production. The niger delta is a typical waveand tidaldominated delta. Petroleum geology of the niger delta geological society, london. While studying the stratigraphy and sedimentology of the niger delta, reijers 2011 noted that shoreface sediments had formed simultaneously in the greater ughelli, central swamp and coastal.
Structural and seismic facies interpretation of fabi field. Foraminifera biostratigraphy and paleoenvironment of well 5. In west african continental margin, the niger delta is very important. Controls on depositional systems and sequence stratigraphy of the pliocene pleistocene strata of eastern niger delta, nigeria oluwaseyi a. Structural and seismic sequence stratigraphy analysis of. The first began with a marine incursion in the middle cretaceous and was terminated by a mild folding phase in santonian time.
Sequence stratigraphic framework of the paradisefield. The niger delta basin of nigeria is a mature petroleum province having been producing for over half a century. Sequence stratigraphy of akos field in the coastal swamp. The niger delta is an oil province of nigeria located on the west african continental margin. Sequence stratigraphy and depositional environments of middle. The niger delta sedimentary basin situated in the gulf of guinea is comprised of traditionally three stratigraphic units of variable geologic characteristics. Seismic stratigraphy and depositional architecture of. Sequence stratigraphy at the university of houston. Pdf deposits of robertkiri field, in the central offshore area of niger delta, comprise a 4 km thick succession of pliocene to miocene. 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. The research work is intended to unravel the sequence stratigraphy of the d7. These can be grouped as topset beds, foresets and bottomset as revealed from seismic stratigraphy galloway 1975. It is in the coastal swamp area of niger delta basin. The topset portion known as regressive continental unit called the benin.
Stratigraphy and sedimentology of the niger delta nasaads. The megasequences form the time stratigraphic frame of the delta and are the backbone for the new delta wide lithostratigraphy proposed here. Sequence stratigraphy analysis of unik field, onshore. It was gradually introduced into nigeria since the early nineties. This was aimed at increasing the resolution for prediction of reservoir, seal, and source rocks in the eastern part of the basin. Application of seismic stratigraphy and structural analysis.
Sequence stratigraphic interpretation of kafe1 field. Structural and seismic facies interpretation of fabi. The stratigraphy of the tertiary niger delta is divided into three formations, representing. So far, people often doubt the impact of crude oil as a resource to the economy of a country, such as nigeria. Though the cretaceous section is yet to be penetrated beneath the niger delta basin, it has been inferred from the nearby anambra basin reijers et al. Nov 28, 2017 the niger delta sedimentary basin situated in the gulf of guinea is comprised of traditionally three stratigraphic units of variable geologic characteristics. Pdf sequence stratigraphic approach to hydrocarbon. Sequence stratigraphic study of b24 well northern depobelt. This basin is very complex, and it carries high economic value as it contains a very. Stratigraphy and petroleum plays of the late to middle. Structural and stratigraphic mapping of patty field. Seismic stratigraphy and depositional architecture of neogene. Abstract lithofacies, depositional sequences and reservoir stratigraphy of the deep offshore field, otherwise.
Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l. It was first applied in the niger delta where it has since refined the potential for prediction of hydrocarbon. Structural and stratigraphic mapping of delta field, agbada. Sequence stratigraphy analysis of unik field, onshore niger. In recent years, the nation is losing its status in the global economy due to oil price inflation, corruption and reduced rate of demand. The techniques succeed only when data sets have favorable characteristics 5. 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. It is bounded to the west and northwest by the western african shield, which termi. Pdf sequence stratigraphy of akos field in the coastal. Today, the delta is covered with a dense grid of 2d and 3d seismic data and it has been penetrated by more than 5,000 wells. It is the most important in the west african continental margin.
The niger delta is a prolific oil province within the west african subcontinent. Geology of the niger delta the niger delta is an oil province of nigeria located on the west african continental margin. Foraminifera biostratigraphy and paleoenvironment of well. The studied field pau field is located in the niger delta oil province.
Obiosio, and ibrahim hamidu abstract a full account of 67 ditch cutting samples collected from well 5, oml 34 in the niger delta at depth intervals between 2441m to 3650m is presented. Oil and gas in the niger delta are primarily produced from. Paleoenviromental and sequence stratigraphic studies. The geology and stratigraphy of niger delta niger delta is situated at the apex of the gulf of guinea on the west coast of africa, covering an area of about 75 000 km2. Controls on depositional systems and sequence stratigraphy. A spectral method of segmenting well data into its main rock. Delta field, niger delta, integration, stratigraphic mapping, structural interpretation, well logs. Niger delta course manual and atlas of structural styles.
Introduction the niger delta is ranked among the major prolific deltaic hydrocarbon provinces in the world and is the most. Recently, academic seismic stratigraphic studies were conducted on the deeper neogene stratigraphic records of the upper slope of the western niger delta, although lacking calibration benjamin et al. Younger sequences of the niger delta upper slope could be a good analog for sedimentary processes in intraslope basins. Delta structure and stratigraphy are intimately related, the development of each being. 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. The traps, structure and stratigraphy are not easy to. The niger delta petroleum system usgs publications repository. Niger delta basin is located on the continental margin of the gulf of guinea in the equatorial west africa and lies between latitudes 4 o and 7 n and longitudes 3o and 9o e whiteman, 1982. Seismic and sequence stratigraphic analyses to delineate the hydrocarbon potential of olawah field, niger delta basin, nigeria taofeek agboola ogunfolabo school of earth and mineral sci. The delta grossly consists of three subsurface lithostratigraphic unitsthe marine akata shales, the paralic agbada formation, and the continental benin.
Stratigraphy and sedimentology of the niger delta geologos. Foraminifera biostratigraphy and paleoenvironment of well 5, oml 34, niger delta, nigeria emmanuel c. Also, existing commercial interpretational techniques and. Stratigraphic setting the stratigraphy of the niger delta is a direct. The niger delta is situated in the gulf of guinea and extends throughout the niger delta province as defined by klett and others 1997. In the wetland niger delta, the niger river, the worlds seventh longest river 4120km long, bifurcates into the nun and forcados rivers whose distributary pattern is actually responsible for the origin of the reticulate drainage pattern that characterizes the niger delta proper. Pdf sequence stratigraphy and structure of the southern. Sequence stratigraphic analysis from well logs of an x. Introduction well logging might be translated as a record of characteristics of rock formations traversed by a. Seven faults f1, f2, f3, f4, f5, f6 and f7 were delineated in the seismic sections. Location of study area and geology the study was carried out in a field situated in the onshore niger delta, southern nigeria. 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. Introduction the area of study is located in kafe1 field of the offshore western niger delta, nigeria figs. The niger delta is one of the worlds largest tertiary delta systems and an extremely.
Seismic and sequence stratigraphic analyses to delineate. Sequence stratigraphy of akos field in the coastal swamp depobelt of the niger delta tope s alege department of earth sciences, kogi state university, anyigba, nigeria abstract welllog sequence stratigraphy has been carried out in the akos field aimed at studying its stratigraphic framework. Application of seismic stratigraphy and structural. The stratigraphy of the niger delta basin consists of cretaceous to holocene marine clastic strata that overlie oceanic and some continental crust fragments corridor et al. The niger delta is a wavedominated delta located on the continental margin of the gulf of guinea that formed in the paleogene. Niger delta akataagbada petroleum system of9950h, chapter a.
This is located within the niger delta basin and sits in 12 feet of water. At present, it appears to be constructive in the center and destructive on either flank figure 2. Okeugo department of geology, university of nigeria, nsukka, enugu state, nigeria 1 d. His research interests include fluvial and deltaic sequence stratigraphy and facies architecture, and the local control of structure on stratigraphy. Department of geology, university of nigeria, nsukka, enugu state, nigeria email. Pdf sequence stratigraphy of niger delta, robertkiri field. Production problems could be field wide or peculiar to the niger delta depobelt. Therefore galloways approach is preferred here for delta wide stratigraphic correlation. 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.
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