5363, Ado-Ekiti, Nigeria ABSTRACT An integrated interpretation of well logs and biostratigraphic data of three selected oil wells (Exxit 73, 75 and 78) of OML The northern depobelt portion of the Akata-Agbada(!) Depobelts: Deposition of the three formations occurred in each of the five off lapping siliciclastics sedimentation cycles that comprise the Niger Delta. From the Eocene to the present times, the delta prograded southwestwards, forming depobelts representing the most active portion of the delta at each stage of its development [4]. The Niger Delta Basin is located on the continental margin of the Gulf of Guinea in Equatorial West Africa and lies between latitudes 4a nd 7N, and longitudes 3and 9E; and covers an area . The Niger Delta is a wave-dominated delta located on the continental margin of the Gulf of Guinea that formed in the Paleogene. It is predominantly marine prodelta shale. Anisotropy and Empirical Relations for the Estimation of Anisotropy Parameters in Niger Delta Depobelts. DOI: 10.4236/ojmp.2012.11001 5,117 Downloads 9,521 Views Citations. In the region of the Niger Delta, rifting diminished altogether in the Late Cretaceous [5]. The most striking structural features of the Niger Delta are . Agbada Formation consists of sand/shale sequence. 2. Depobelts otherwise known as sedimentation cycles are common in Niger Delta. The journal publishes majorly in the area(s): Population & Porous medium. The Niger delta basin is one of the largest subaerial basins in Africa. If you do not already have Acrobat Reader version 3.0 or later, you may download the latest version here. 14), while fines . The development of the Niger Delta took place in discrete structural units (depobelts) that act as sub-basins, and this was as a result of the activity of large growth f. It can be concluded from the foregoing that the Ministry has delivered on its mandates to formulate, oversee and implement Government Policies in the Niger Delta Region; provide roads including efforts at completing the construction of the East-West Road; combat erosion and land degradation problems in many areas in the Region; and take . 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). Santogrossi, eds divergent/passive margin basins: American Association of Petroleum Geologists Bulletin Memoir 48 . Geology of Niger Delta The Niger Delta is situated in the Gulf of Guinea (Figure 1) and extends throughout the Niger Delta Province as defined by Klett [4]. The analysis revealed four 3rd order depositional sequences (SEQ1 to 4) bounded by three erosional unconformities interpreted as Sequence Boundaries (SB1 to 3). The northern depobelt portion of the Akata-Agbada(!) the Niger Delta by grouping them as Northern, Greater Ughelli, Central Swamp, Coastal Swamp and Offshore depobelts [10,22]. The northern depobelt portion of the Akata-Agbada(!) Static Reservoir Modeling of the Eocene Clastic Reservoirs in the Q-Field, Niger Delta, Nigeria. 2008; Magbagbeola and Willis 2007). Fig. Reservoir characterization of a field was performed using petrophysical parameters for the evaluation of subsurface geological features and hydrocarbon potential of an onshore field in Niger Delta Basin. The two arms from publication: Occurrence and Distribution of Pyrene and its Derivatives in Crude Oils and Source Rock Extracts . SPE Liquids-Rich Basins Conference - North America (1) SPE Low Perm Symposium (1) SPE/AAPG/SEG Unconventional Resources Technology Conference (4) . BACKGROUND PAPER: THE NIGER DELTA Sofiri Peterside Patterson Ogon One of the great deltaic regions in the world, the Niger delta is a vast sedimentary basin constructed over time through successive thick layers of sediments dating back 40-50 million years to the Eocene epoch. petroleum system corresponds geographically and stratigraphically to the northernmost of six depobelts recognized in the Niger delta. 719201), Niger Delta Province, Nigeria, Cameroon, and Equatorial Guinea, Africa by Michele L. W. Tuttle, Michael E. Brownfield, and Ronald R. Charpentier Chapter B. Therefore, the exploration for oil and gas in the Niger Delta is . The Niger Delta depobelts formed one of the world's biggest regressive deltas within a region of some 300,000 km 2, a sediment volume of 500,000 cubic kilometres and thickness of over 10 km [14] [15] [16]. 9.1). The basin can be divided into three diachronous lithostratigraphic unit based on their stratigraphy, sedimentological, faunal data and . 719201), Niger Delta . 719201), Niger Delta Province, Nigeria, Cameroon, and Equatorial Guinea, Africa by Michele L. W. Tuttle, Michael E. Brownfield, and Ronald R. Charpentier Chapter B. 149 1: Map showing Depobelts in the Niger Delta Basin and approximate location of well ASN-1 (Modified after Onikoyi et. 14 B' A 5 N AI NE CH ZO T . Location, geologic and tectonic setting. It is an excellent petroleum province, ranked by the U.S . Also turbidite sands with minor amounts of clay and silt are common (Avbovbo 1978). 55(2) 2019. Download scientific diagram | a Map showing Nigeria with location of the Niger Delta Basin (modified after Alao et al. Chapter A Tertiary Niger Delta (Akata-Agbada) Petroleum System (No. Swamp Depobelts of the Niger Delta was carried out using wireline logs, biofacies data and seismic section. Deposi- tion of coarse material of the Agbada Formation took place in what is now known as the North- ern Delta depobelt in the Early-Middle Eocene (Fig. petroleum system corresponds geographically and stratigraphically to the northernmost of six depobelts recognized in the Niger delta. 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 [5]. . Journal of Mining and Geology Vol. Download scientific diagram | Niger Delta depobelts (Reijer, 2011), base map of " RAY " field showing spatial distribution of studied wells from publication: Analysis of Depositional Systems and . Four reservoir intervals were identified Table 1. Delta-Feld (Niger-Delta) 425x425px300x300px Das Delta-Feld liegt offshore von Nigeria auf Oil Mining Leases (OML) 49 und 95. . [1] The sediment fill has a depth between 9-12 km. Sie stellen auch eine Vernderung des regionalen Dips des Deltas dar.Jeder Depobelt besteht aus genetisch hnlichen . (1999) who proposed three sequence stratigraphic models for The Niger Delta Basin to date is the most prolific and economic sedimentary basin in Nigeria. Early coastlines were concave to the sea and depositional patterns strongly influenced Highlight matches The Niger Delta oil province in Nigeria is chiefly composed of several pay zones with many stratigraphic intervals of sand and shale formations in varying proportion. Figure 1. Open Journal of Medical Psychology Vol.1 No.1 January 12, 2012. The gravity tectonism became the primary deformational process. These cycles (depobelts) are 30-60 kilometers wide, prograde southwestward 250 kilometers over oceanic crust into the Gulf of Guinea (Stacher, 1995), and are defined by. -----ABSTRACT-----Thomsen's parameter (delta, ) for Vertical Transversely Isotropic (VTI) media was estimated in two depobelts of the Niger Delta. This was based on seismic and well velocity data within common midpoint gathers for different offset ranges to extend anisotropic normal moveout correction in processing steps. petroleum system corresponds geographically and stratigraphically to the northernmost of six depobelts recognized in the Niger delta. 719201), Niger Delta Province, Nigeria, Cameroon, and Equatorial Guinea, Africa Niger Delta depobelt province. The Niger Delta is located on a typical passive margin with sediment thicknessesin excess of 12 km at the basin center. The Niger Delta underlies an area of about 256,000 km 2, and was initially built over an older transgressive Paleocene prodelta. 1999. 3.2 Analytical methods. Showing Niger Delta depobelts, base map of "XB" field and spatial distribution of studied wells. Niger Delta Geology - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Coastal Swamp Depobelts, Western Offshore Niger Delta Adegoke, Adebanji Kayode Department of Geology, Faculty of Science, Ekiti State University, P.M.B. Niger Delta (Opara et al. International Journal of Geosciences Vol.7 No.3March 25, 2016 Effect of hydrocarbon production on reflection amplitude properties of reservoirsa case study of Kov Field, Niger Delta, Nigeria Figure 1: Map of the Niger Delta Depobelts Showing the Location of B-24 Well (modified after Stacher, 1995) Several studies have been carried out in relation to the sequence stratigraphy of different wells in the Niger Delta basin. Niger Delta depobelts, sequence stratigraphic model for Niger Delta and relationship to hydrocarbon occurrence (after Stacher, 1995). 1 ) and situated between 500E-502E longitudes and 550N-552 . Diese Depobelts stellen den aktivsten Teil des Deltas in jeder Phase seiner Entwicklung dar. Hydrocarbons have been located in all of the depobelts of the Niger Delta, in good quality sandstone reservoirs belonging to the main deltaic sequence (the 'paralic sequence' of common usage). These depobelts form one of the largest regressive deltas in the world with an area of some 300,000 km 2 a sediment volume of 500,000 km3 and a sediment thickness of over 10 km in the basin . and II depobelts of the Niger Delta , while forty and II depobelts of the Niger D h measurements of each depobelts using Ms depobelt , 1.10 and 1.63 for a and m for indicate that the obtained factor for Niger Delta fields - Efeotor, 1997). This work integrates seismic and well log data to establish a 3D reservoir model of the Q-Field . The Delta Field is located offshore from Nigeria on Oil Mining Leases (OML) 49 and 95. Full size image The petroleum field of study is the OPO field in the shallow offshore depobelt, with water depths of about 50-100 metres within the western parts of the Niger Delta basin (Fig. belts (depobelts or mega-structures) in a succession tem-porally and spatially with southward progradation of the Delta (Doust and Omatsola 1990). Continued Successful SA Recovery during the Maintenance Stage: Intra-Individual Resource Loss & Gain Predict Relapse. Results obtained from inversion depict an acoustic impedance values . These depobelts form one of the largest regressive deltas in the world with . Iheanyichukwu P. C. Okorie, Joseph O. Ebeniro, Chukwuemeka N. Ehirim. The deltaic sequence in each of these depobelts is distinct in age, so that they actually represent successive phases in the delta's history. The entire Open-File Report 99-50-H can be successfully viewed or downloaded (2.9MB), for use with Adobe Acrobat Reader (version 3.0 or later). Our results in the Central Swamp and Greater Ughelli depobelts shows a higher degree of anisotropy in shales than sands, indicating that the Niger Delta shales are intrinsically anisotropic. ABSTRACT Reservoir and bottom hole temperatures from seventy wells in the Eastern Niger Delta suggests that two leg dogleg geothermal . The Niger Delta is situated in the Gulf of Guinea and extends throughout the Niger Delta Province as defined by Klett and others (1997). This portion of the system has a total surface area of 7675 km2 and contains about 3 billion bbl of mostly light waxy crude oil and over 7 trillion scf of gas. (B) Shows the distribution of the oil wells, growth faults in the study field and directions of wells correlations. . /parallic) section, geothermal gradients vary between 18 - 45 o C/Km. The Northern Delta and Greater Ughelli depobelts . 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. In this paper, time depth conversion technique had been used to The study area (Central Swamp and Greater Ughelli Depobelts) in Niger Delta (Figure 1) are characterized by alternating sequence of massive shale beds producing seismic anisotropy of VTI (Vertical Transverse Isotro-py) type. The Akata Formation lies at the base of the Niger Delta sequence. Most hydrocarbon-bearing structures are along proximal margins of sub basins where growth strata accumulated on blocks downdropped . The estimation of subsurface velocity is very important in seismic reflection as it controls the quality of the depth images, which is the basis of most geological interpretation. The non-hyperbolic moveout of events in the depobelts is mostly associated with this anisotropy, which is Geology and Stratigraphy of the Study Area . Delta construction proceeded in discrete minibasins ranging in tectonic configuration from extensional, through translational to compressional toe-thrust regions. The average geothermal gradient for the various depobelts is 19 o C/Km for the Central Swamp, 17o C/Km for the Coastal Swamp and 20o C . deposits resulting from these cycles (depobelts) are Shale mobility induced internal deformation and occurred 3060km wide and prograde southwestward 250km in response to two . These hydrocarbons, whose source rocks are both . These include Armentrout et al. Cross River Delta (Evamy et al., 1978). [2] It is composed of several different geologic formations that indicate how this basin could have formed . THE NIGER DELTA Regional Setting The Niger Delta clastic wedge formed along a failed arm of a triple junction system (aulacogen) that originally developed during break up of the South American and African plates in the late Jurassic (Burke et al., 1972; Whiteman, 1982). These cycles One of the world's largest deltas, the immense coastal (c) Seismic survey base . The seven prominent depobelts of the Niger Delta Basin based on age (modified from Doust and Omatsola [16]) Depobelts Paralic sequence Alluvial sands Northern Delta Late Eocene to Oligocene Early Miocene It shows location of Niger delta in west Africa, and modified to show location of study field and the depobelts [3]. The combined occurrence of rift structures, basin subsidence, rapid progradation of deltaic systems, development of growth faults and fold thrust belts in the offshore Niger Delta produced a very unique petroleum habitat with . Anisotropy and Empirical Relations for the Estimation of Anisotropy Parameters in Niger Delta Depobelts Iheanyichukwu P. C. Okorie , Joseph O. Ebeniro , Chukwuemeka N. Ehirim International Journal of Geosciences Vol.7 No.3 March 25, 2016 2013). The Niger delta basin is situated on the continental margin of the Gulf of Guinea between 0 0 0 0 latitude 3 and 6 N and longitude 5 and 8 E. Figure 2 is the geology map of Niger delta basin . 54th U.S. Rock Mechanics/Geomechanics Symposium (1) SPE Annual Technical Conference and Exhibition (1) SPE Liquids-Rich Basins Conference - North America (1) specific for the Niger Delta depobelts was used to estimate and generate shear wave velocity for the wells. 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. deposits have been divided into three large-scale lithos- tratigraphic units (Figure 2: (1) Basal Paleocene to Recent pro-delta facies of the Akata Formation, (2) Eocene to Re- cent, paralic facies of the Agbada Formation and (3) Oli- Five bounding stratigraphic surfaces comprising three candidate maximum flooding surfaces and two candidate sequence boundaries were delineated using progradational and retrogradational stacking pattern. Niger Delta: in J.D. Such fluid can be oil, gas or water. This portion of the system has a total surface area of 7675 km 2 and contains about 3 billion bbl of mostly light waxy crude oil and over 7 trillion scf of gas . Download scientific diagram | Niger Delta depobelts and sample locations [9]. The study area, fig.1 (Niger Delta) is situated in the Gulf of Guinea. This portion of the system has a total surface area of 7675 km2 and contains about 3 billion bbl of mostly light waxy crude oil and over 7 trillion scf of gas. Over the lifetime, 978 publication(s) have been published in the journal receiving 5224 citation(s). Assessment of Undiscovered Petroleum in the Tertiary Niger Delta (Akata-Agbada) Petroleum System (No. It is documented that offshore depobelt was formed . 719201), Niger Delta Province, Nigeria, Cameroon, and Equatorial Guinea, Africa Four maximum flooding surfaces . In 1965, the Delta 1 well was completed and the Delta Field opened in 1968 for production.. . 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 [].The ideas expressed on location, geologic and tectonic setting is from []. Edwards P.A. Keywords: Niger delta; Depobelts; Facies belts Introduction The morphology of the Niger Delta can be subdivided into an early stage, spanning the Paleocene to early Eocene, and a later stage of delta development beginning in Miocene time [1]. The Niger Delta is in the Gulf of Guinea and extends throughout the Niger Delta province. The predominance of shales in the depobelts accounts for this high degree of anisotropy. (A) High-resolution bathymetric image of the Niger Delta [14]. This sequence of events repeated itself five to six times over the last 38 million years to define a series of depobelts in the Niger Delta. Department of Chemical Engineering, and Energy & Geoscience Institute, University of Utah. Fig. Map of the Niger Delta showing the study area and the major depobelts. Assessment of Undiscovered Petroleum in the Tertiary Niger Delta (Akata-Agbada) Petroleum System (No. These cycles (depobelts) are 30-60 kilometers wide, prograded southwestward 250 kilometers over oceanic crust into the Gulf of Guinea (Stacher, 1995), and are defined by (b) Map of the oil fields within depobelts. Figure 1. Depobelts Deposition of the three formations occurred in each of the five offlapping siliciclastic sedimentation cycles that comprise the Niger Delta. al., 2014) . This is located within the Niger Delta Basin and sits in 12 feet of water. . Map of Niger Delta showing depobelts /locations of studied oils. Five major depobelts are generally recognized namely, Northern Delta, Greater Ughelli, Central Swamp, Coastal Swamp, and Offshore (Fig. This work examines ichnological attributes and variability of core samples from four wells (1-4) within the Coastal Swamp and shallow Offshore depobel Explore 70 research articles published in the Journal Global Journal of Pure and Applied Sciences in the year 2001. The Niger delta is situated within the continental margin of the Gulf of Guinea in southern elta Niger D The considered oils (approximately 30mg) were carefully separated, into the saturated and aromatic hydrocarbons, and polar compounds, using n-hexane (30 ml), n-hexane/dichloromethane (60:40, vol/vol/ 40 ml) and dichloromethane/methanol (50:50, 30 ml) respectively. 1: A descriptive map of the Niger Delta showing main depobelts and the study area (Modified from Doust and Omatsola, 1990) b a. Lisa C. Walt, Ed Stevens, Leonard A. Jason, Joseph R. Ferrari. 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A wave-dominated Delta located on a typical passive margin with sediment thicknessesin of! [ 2 ] it is an excellent Petroleum province, ranked by the U.S diminished altogether in the region the!: Population & amp ; Gain Predict Relapse download scientific diagram | a map showing Nigeria with location of Niger... Exploration for oil and gas in the Late Cretaceous [ 5 ] Dips. Area of about 256,000 km 2, and Equatorial Guinea, Africa Niger Delta results obtained from inversion an! Is Geology and stratigraphy of the largest regressive Deltas in the Q-Field, Niger Delta depobelts eds margin... Map of Niger Delta basin and approximate location of the Q-Field, Niger Delta basin ( Modified Onikoyi! Immense Coastal ( c ) seismic survey base configuration from extensional, translational! Und 95. Nigeria, Cameroon, and Energy & amp ; Gain Predict Relapse belts ( depobelts or mega-structures in. 14 ] ) have been published in the Niger Delta province, Nigeria,,...
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