Sedimentology and depositional environments of the. This basin is very complex, and it carries high economic value as it contains a very productive petroleum system. Sequence stratigraphic, structural and reservoir analytical tools have been employed in interpreting the geology of the eastern coastal swamp depobelt of the niger delta basin. The presence of libycoceras dandense howarth in marine facies of the nkporo shale about 35 m below the nkporomamu contact in the lokpaukwuleru section demonstrates that in this area the. Nine stratigraphic bounding surfaces including five sequence boundaries sbs dated. Biostratigraphy, depositional environment and sequence stratigraphy of akata field akata 2, 4, 6 and 7 wells, eastern niger delta, nigeria. Pdf sequence stratigraphy and structure of the southern. Benue trough introduction the benue trough of nigeria is an intracratonic rift structure, which extends from the northern limit of the niger delta to the southern margins of chad basin. Sequence stratigraphic interpretation had been carried out in parts of the anambra basin using data from three wells alo1 igbariam1 and ajire1.
Studies published by benkhelil, 1982, guiraud et al. Sequence stratigraphy and reservoir quality studies were carried out by integrating well logs from five wells, biofacies data, and 3d seismic reflection data of an onshore field, niger delta. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. Sequence stratigraphy and structure of the southern coastal swamp of the niger delta, nigeria. Seismic stratigraphy and attribute analysis of an offshore.
Sequence stratigraphy and depositional environments of. The conventional stratigraphy of the bida basin has the bida formation at the base in the northern sector, followed successively upward. Geophysical well logs and biostratigraphic data were integrated in order to identify key bounding surfaces, subdivide the sediment packages, correlate sand continuity and interpret the environment. Sequence stratigraphy and controls on sedimentation of the. 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. The objective of the study are to carry out sequence stratigraphic interpretation of well logs in order to establish correlation of units and its. The aim of this study is to carry out a sequence stratigraphic interpretation of b24 well in. A detailed understanding of sequence stratigraphy can provide a chronostratigraphic framework for stratigraphic predictions, correlation and mapping of sedimentary packages. Sequence stratigraphic interpretation and correlation of the five wells were performed and the chart produced is useful in further deepening the knowledge of the subsurface geology of the niger delta area of nigeria. P5 1,4,5 department of geology, university of port harcourt, nigeria 2desopadec, warri, nigeria 3 department of geology, anambra state university, uli, nigeria abstract. Sequence stratigraphic interpretation of parts of anambra.
The aspect of sequence stratigraphy requires more work for a more accurate definition of stratigraphic surfaces required for the establishment of systems tracts and sequences. Outcropbased sequence stratigraphic analysis and palynological biofacies were used to define depositional sequences and their bounding surfaces, and build a sequence stratigraphic model for the upper cretaceous succession of the afikpo subbasin. Stratigraphy, scientific discipline concerned with the description of rock successions and their interpretation in terms of a general time scale. Pdf insight into sequence stratigraphic and structural. Sequence stratigraphy, structural framework and hydrocarbon migration of ariki field, nigeria article pdf available in petroleum exploration and development 431. Sequence stratigraphic study and reservoir prediction of ekazy field, greater ughelli depobelt, niger delta, nigeria topics sequence stratigraphy, biostratigraphy, correlation, well logs. Reservoir geology and sequence stratigraphy of deep water sediments, offshore depobelt, niger delta, nigeria matthew o. Facies analysis and sequence stratigraphy of missole. Structurally the delta is subdivided into several depobelts from the northern delta to the deep offshore delta. Pdf sequence stratigraphy study of uniabr field in. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough.
Introduction the conce pt of sequence stratigraphy has emerged as an important exploration too l for hydrocarbon in the niger d elta basin fills. Structural and seismic sequence stratigraphy analysis of. Sequence stratigraphic interpretation of kafe1 field. Stratigraphy and sedimentology of the niger delta 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. Sedimentology and sequence stratigraphy of the nkporo. Sedimentology and depositional environments of the maastrichtian patti formation, southeastern bida basin, nigeria. Stratigraphy and sedimentology of the niger delta 7 during the middlelate eocene, sediment was deposited fig. The niger delta basin of nigeria is a mature petroleum province having been producing for over half a century. A sequence stratigraphic study was carried out on ditch cutting samples from well5 oml 34 in the niger delta in nigeria. Sequence stratigraphy analysis of unik field, onshore.
Full text of sequence stratigraphic study and reservoir. It was gradually introduced into nigeria since the early nineties. Sequence stratigraphic analysis from well logs of an x. Structural and seismic sequence stratigraphy analysis of seismic and biostratigraphy data from an onshore field, niger delta, nigeria g. Sequence stratigraphy, seismic stratigraphy, b iostratigraphy, northern depobelt, niger delta. Shell petroleum development company of nigeria, corporate reprographic services, warri 1996. Sequence stratigraphy study of uniabr field in northern delta depobelt of niger delta, nigeria article pdf available in environmental earth sciences 41.
Sedimentology and sequence stratigraphy of the nkporo group campanianmaastrichtian, anambra basin, nigeria sandstones obi, 2000. Stratigraphy and petroleum plays of the late to middle. Four unconformitybounded thirdorder depositional sequences were identified. Sequence stratigraphy, kafe1 field, western niger delta, systems tract, well correlation i. Sequence stratigraphy, structural framework and hydrocarbon migration of ariki field, nigeria ahaneku c v1, okoro a u1, odoh b i1, anomneze d o2, chima k i3, ejeke c f1, okoli i n1 1. Sequence stratigraphy of well dx 1856 amiewalan, fo. Sequence stratigraphic technique was applied to sediments in the xy field, onshore niger delta by integrating six well logs and biostratigraphic data. Sequence boundary, maximum flooding surface, system tracts, depositional sequence. Early to middle miocene sequence stratigraphy of well5. Sequence stratigraphy analysis of unik field, onshore niger delta, nigeria oluwatoyin khadijat olaleye, department of applied geophysics, the federal university of technology, akure, nigeria.
Geological setting and stratigraphy the nigerian sector of the benin dahomey basin is located in the southwestern nigeria covering three different states, namely, lagos, ogun and ondo figure 3. The bida basin is one of nigeria s inland frontier basins. Abstract nigeria s search for increased oil and gas reserves requires the discovery of additional petroleum plays using more accurate exploration techniques like sequence stratigraphy. Najime department of geology, ahmadu bello university, zaria nigeria abstract a sequence stratigraphic analysis was carried out on ditch cutting samples from amansiodo1 well, anambra basin nigeria. Agbada formation in delta field figure 1 by relating strata discontinuities observed. Full text of sequence stratigraphic interpretation of the olu oilfield sediments, offshore niger delta, nigeria see other formats international basic and applied research journal vol.
Interaction between sealevel changes and depositional. The sequence stratigraphic analysis of unik field located in the coastal swamp area of niger delta basin has been carried out. The sequence stratigraphic analysis based on foraminifera content and lithologic descriptions has revealed the following. Sequence stratigraphy and structure of the southern. Sequence stratigraphy of well dx, gongola subbasin, upper. The sequence stratigraphic interpretations are useful in further deepening the knowledge of thesubsurface geology of the studiedwell in gongola sub basin, upper benue trough of nigeria. The basin is bounded to the south by the niger delta basin hinge line. Akata formation is part of the tertiary niger delta akataagbada petroleum system located in the niger delta province, of nigeria at the gulf of guinea, atlantic ocean the upper akata formation is cited to be a primary source rock, providing type iiiii kerogen, and a potential target in deep water offshore and possibly beneath currently producing intervals onshore. Sequence stratigraphic interpretation of kafe1 field, offshore. The methods of seismic geohistory analysis and differential interformational velocity.
Sequence stratigraphic analysis and reservoir quality. Controls on depositional systems and sequence stratigraphy of the pliocene pleistocene strata of eastern niger delta, nigeria oluwaseyi a. Controls on depositional systems and sequence stratigraphy. Paleodepositional environment and sequence stratigraphy of outcropping sediments in parts of southern middle niger basin, nigeria osokpor, j. Sequence stratigraphy of amansiodo1 well, anambra basin.
Full text of sequence stratigraphic interpretation of the. Udoh 1,2department of geology, university of port harcourt, port harcourt, nigeria. Sequence stratigraphy study of uniabr field in northern delta depobelt of niger delta, nigeria integrated interpretation of wireline logs and high resolution biostratigraphic data has enhanced the subdivision of the stratigraphic column within the uniabr field fictitious oml 4 in the niger delta of nigeria into five sequences and different. Department of geological sciences, nnamdi azikiwe university, awka, anambra state, nigeria. The book is addressed to anyone interested in understanding and applying the method of sequence stratigraphic analysis, from students to geologists. Main criteria for this interpretation are the presence of siliciclastic intercalations, of prominent hardgrounds, of characteristic microfacies including stromatolites and of phreatic. Sequence stratigraphy of the niger delta, delta field, offshore nigeria. The marginalshallow marine nkporo group is the basal lithostratigraphic unit of the late campanianmaastrichtian successions of the anambra basin, nigeria fig. It provides a basis for historical geology, and its principles and methods have found application in such fields as petroleum geology and archaeology. Paleodepositional environment and sequence stratigraphy of. A new insight into the hydrocarbon systems and prospectivity at deeper stratigraphic. Reijersselected chapters in geology and sequence stratigraphy in nigeria and three case studies and a field guide. Sequence stratigraphy and depositional environments of middlelate miocene sediments in the eastern part of the coastal swamp depobelt, niger delta basin, nigeria. Full text of sequence stratigraphic study and reservoir prediction of ekazy field, greater ughelli depobelt, niger delta, nigeria see other formats international basic and applied research journal vol.
Field observations and petrographic analysis allow a sequence stratigraphic interpretation of the intensely karstified albian mfamosing limestone formation in the calabar flank of the southeastern niger delta. Sequence stratigraphy based on microfacies analysis. A sequence stratigraphic model for the group was developed by nwajide and reijers 1996, on the basis of stratigraphic analysis of a composite section located at leru, near okigwe. Threedimensional seismic and composite well log data from three wells were used to carry out log sequence seismic stratigraphy and attribute analysis of an offshore field niger delta. Eyo department of physics, university of port harcourt, port harcourt, nigeria email address. This paper presents the potential depositional framework of sandstones and unconsolidated sand reservoirs, seals, and traps in the western part of the coastal swamp depobelt of the niger delta basin, nigeria, through integration of sequence stratigraphy and seismic imaging. Sequence stratigraphy study of uniabr field in northern delta depobelt of niger delta, nigeria clement edem bassey1, thomas a. The trough had been viewed simply as an elongate intracratonic structure of over 1,000 km long and up to 250 km at its widest parts, developed as a purely rift structure in the panafrican mobile belt. Depositional facies and sequence stratigraphic study in.
Sequence stratigraphic studies of xfield, centralcoastal swamp depobelts, niger delta nigeria agraka e. Sequence stratigraphic interpretation of the cretaceous. The valley which is occupied by up to 600m of marine and fluviodeltaic sediments, that. Sequence stratigraphy of amansiodo1 well, anambra basin, southeast, nigeria 1m. Middle cretaceous sequence stratigraphy at the ashaka cement quarry in gongola basin of the upper benue trough, northeast nigeria suleiman u. Stratigraphy and sedimentology of the niger delta in.
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