Petrophysical evaluation and volumetric estimation within. The niger delta area of nigeria is host to major oil and gas exploration activities in the west atlantic gulf of guinea. Requires subscription pdf published 20061010 issue vol 42 no 1 2006 section articles. An estimate of oil window in nigeria niger delta basin from. Exploration activities have been concentrated in the onshore part of this basin but as the delta becomes better understood. A suite of geophysical open hole logs namely gamma ray. Petrophysical evaluation had been carried out as well as deducing the reservoir geometry.
Regional psdm seismic line ng24500 across the main provinces of the niger delta. Journal of petroleum exploration and production technology. This study is aimed at making available petrophysical data, basically water saturation calculation using cementation values of 2. Clays from the recent delta have similar mineralogical compositions. The size and distribution of niger delta fields is remarkable. The structure of the offshore niger delta geology department. Resistivity, sonic, caliper and density were used to. Brownfield openfile report 9950h 1999 contents forward by the u. The niger delta province contains only one identified petroleum system kulke, 1995. American association of petroleum geologists bulletin 76 547 562. 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.
The study area lies within the northern delta, eocene older depobelt fig. The niger delta petroleum system usgs publications repository. Doc geology of nigeria vincent kalu and stanless pee. Geological map of the niger delta and surroundings. Petroleum pipelines, spillages and the environment of the. Predicting petroleum generation is a critical issue in prospect evaluation for the deeper prospects because of its economic implications. Niger delta petroleum systems, nigeria, by richard c. Stratigraphy and sedimentology of the niger delta geologos. In the niger delta province, we have identified one petroleum system the tertiary niger delta akataagbada petroleum system. Sedimentological aspects of oil fields in the niger delta. Geological section through the sedimentary layers of the niger deltas mouth 9.
Petrophysical analysis was performed in two wells in the niger delta region, nigeria. The company operates around 3 oil blocks in its region after it acquired a 100% stake and operatorship of the omerelu farm out area in 2014 from the nnpcchevron jv. The niger delta is a wavedominated delta located on the continental margin of the gulf of guinea that formed in the paleogene. It seeks to operate as an integrated oil and gas company. The basin is deformed by large synsedimentaty faults, roll. The niger delta region in the light of the theory of. In 1997, 96% of the niger delta recoverable petroleum was in nigeria, 3. Maps showing the geological setting of the niger delta in a section 8. American association of petroleum geologists studies in geology 27, 110. Surface geology shown on the african plate, major cretaceous rift basins and breakup direction shown. The niger delta basin is located in the gulf of guinea on the west coast of africa.
Petroleum geology of the niger delta is described in evamy et al. The niger delta is the delta of the niger river sitting directly on the gulf of guinea on the atlantic ocean in nigeria. Our publiclyowned company and its subsidiaries continually strive to establish an active partnership with the host communities in which we conduct our operations. The niger delta basin has a total area of about 75,000 km 2 and occupies the coastal and part of the oceanward of the benue trough.
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. Pdf evaluation of reservoirs petrophysical parameters. 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. The study area is located onshore of the niger deltanigeria, it covers an area of 40,000 km2. The minimum extent of the petroleum system is defined by the areal extent of fields and contains known resources cumulative production. Nov, 2015 7the niger delta province petroleum geology i ss 2014 facies distribution of the niger delta fig. Niger delta petroleum systems, nigeria petroleum systems of. American association of petroleum geologists bulletin 56. The niger delta is one of the worlds largest tertiary delta systems and an extremely prolific. Geology department ahmadu bello university zaria, nigeria e. The first began with a marine incursion in the middle cretaceous and was terminated by a mild folding phase in santonian time. Reservoir characterization in o field in the niger delta. Mineral studies of the subsurface niger delta odigi.
A method to reduce the uncertainty of pressure prediction. Geology of niger delta petroleum reservoir petroleum. 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. But, there exists a variation in the nature and rate of sediment supply and accommodation space resulting in the pattern and nature of sediments deposited in. Petrophysical evaluation of uzek well using well log and core. This system is referred to here as the tertiary niger delta akata agbada petroleum system. In 1965, the delta 1 well was completed and the delta field opened in 1968 for production. The basin has matured through one cycle of successful exploration, and future success depends on linking the geology of the shelf and onshore areas to deep. Mineralogical studies of tertiary subsurface sediments in the niger delta have shown that smectite, kaolinite, mixed. The geology of the tertiary niger delta province has been described by several workers short and stauble, 1967. Pd 41 petroleum geology of the niger delta onepetro.
It is typically considered to be located within nine coastal southern nigerian states, which include. Fundamentals of petroleum geology pdf free download. The reservoir properties of the d3 sandstone in idje field of the niger delta region had been established. Nov 21, 2017 a the niger delta complex and b section through the continental shelf, slope and rise showing structural domains of niger delta cohen and mcclay 1996 full size image 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.
Proceedings of the ninth world petroleum congress 2, 209221. It has long been recognized that the prograding niger delta causes extensive gravity spreading with the offshore manifestation of this gravitydriven deformation consisting of substantial extension on the shelf and inner slope, and con. Niger delta petroleum systems, nigeria request pdf researchgate. The identified petroleum system within the niger delta province is the tertiary niger delta akataagbada petroleum system 1416.
It lies in the south western part of the benue trough, which is a much bigger tectonic. However, the recycling of carbon as co2 is not totally efficient in that a very small amount about 0. This is located within the niger delta basin and sits in 12 feet of water. 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. Niger delta petroleum systems, nigeria petroleum systems. Petroleum geology of the niger delta abstract the niger delta is a large, arcuate delta of the destructive, wavedominated type. Cenozoic niger delta the modern delta recent depositional environments and sedimen tary facies in the niger delta described by allen 1965, 1970 have furnished a lithogenetic model that relates facies variations of modem high energy, wavedominated, constructional, arcuatelobate trop ical deltas to depositional process fig.
The three main geological formations that make up the niger delta are the akata, agbada and benin formations. Petroleum hydrocarbons contamination of the environment associated with exploration, development and production operations is a common feature in oil producing nations around the world, especially in a developing country like nigeria where the incidence of facilities sabotage, operational failures, accidental discharges, pipeline vandalization and leakages, bunkering and artisanal refining is. Recoverable oil and gas produced plus proved reserves are much smaller than in nigeria. It has an aerial extent of 75,000 km 2 and a total estimated area of 300,000 km 2. In the niger delta province, we have identified one petroleum systemthe.
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. A considerable amount of new information, however, has become available since publication of those papers, including penetration of a tertiary oilprone source rock sequence in aroh2 well. Reservoir description and characterization of eni field. The basin consists of progradational, paralic sequences of akata, agbada and benin formations which builds southwards into the deep waters and. However, the recycling of carbon as co2 is not totally efficient in that a very small. The niger delta region of nigeria and petroleum hydrocarbons contamination. A sequence of undercompacted marine clays, overlain by paralic deposits, in turn covered by continental sands, is present throughout, builtup by the imbricated super position of numerous offlap cycles. Petroleum geology of the niger delta geological society, london. Udoh 1,2department of geology, university of port harcourt, port harcourt, nigeria. Niger delta akataagbada petroleum system of9950h, chapter a. Stratigraphy and sedimentology of the niger delta in. Hydrocarbon charge in petroleum systems of the niger delta. The trend has been helped by growing recognition within the. 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.
Reservoir geology and sequence stratigraphy of deep water sediments, offshore depobelt, niger delta, nigeria matthew o. Tertiary niger delta akataagbada petroleum system no. Stratigraphy and petroleum plays of the late to middle. 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 bida basin, also known as the midniger or nupe basin, is located in westcentral nigeria figure. Niger delta petroleum systems, nigeria request pdf. Structural and seismic facies interpretation of fabi field. The delta field is located offshore from nigeria on oil mining leases oml 49 and 95. Niger delta province, nigeria cameroon, and equatorial guinea, africa by michele l. Geologic map of the niger delta basin and the benue trough, and the oil fields in the region. An estimate of oil window in nigeria niger delta basin. The niger delta is a prolific oil province within the west african subcontinent.
The niger delta basin is located on the continental margin of the gulf of guinea in between latitudes 3 and 6 n and longitudes 5 and 8 e. The rocks within the petroleum system are from paleocene to recent in age. Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l. In most other oil provinces, there is a noticeable skewness in the distribution of field sizes, e. Thermal maturity evaluation and prediction of petroleum generation. Niger delta continental slope, deepwater deposits, turbidite channel systems, architecture models sedimentary architecture models of deepwater turbidite channel systems in the niger delta continental slope, west africa corresponding author. Sedimentary architecture models of deepwater turbidite. 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. Petroleum hydrocarbons contamination of surface water and. Niger delta petroleum resources plc upstream nigeria oil.
Fatona is also a leading authority on the geology of the niger delta oil and gas province. Engineering geology of the niger delta 67 sediments originating from the vast catchment area and geologic ally com plex hinterland fig. The tertiary petroleum system of the niger delta has most recently been discussed in papers by ekweozor and daukoru 1994 and stacher 1995. Department of geology, university of port harcourt, nigeria abstract. Petrophysical evaluation and reservoir geometry deduction. The coastal sedimentary basin of nigeria has been the scene of three depositional cycles. In more recent times, the environment in the niger delta has been at the centre of local and international discourse in seminars, conferences and even in the government. Hydrocarbon charge in petroleum systems of the niger delta, nigeria bj katz energy technology company, chevron, 1500 lousiana. 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.