Conventional Reservoirs

Topics: Petroleum, Petroleum geology, Natural gas Pages: 21 (8317 words) Published: April 16, 2013
The Niger Delta Petroleum System:  Niger Delta Province, Nigeria, Cameroon, and Equatorial Guinea, AfricabyMichele L. W. Tuttle,  Ronald R. Charpentier,  and Michael E. BrownfieldOpen-File Report 99-50-H|

Chapter ATertiary Niger Delta (Akata-Agbada) Petroleum System (No. 701901), Niger Delta Province, Nigeria, Cameroon, and Equatorial Guinea, Africaby Michele L. W. Tuttle, Michael E. Brownfield, and Ronald R. CharpentierABSTRACT  In the Niger Delta province, we have identified one petroleum system--the Tertiary Niger Delta (Akata-Agbada) petroleum system. 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. The delta proper began developing in the Eocene, accumulating sediments that now are over 10 kilometers thick. The primary source rock is the upper Akata Formation, the marine-shale facies of the delta, with possibly contribution from interbedded marine shale of the lowermost Agbada Formation. Oil is produced from sandstone facies within the Agbada Formation, however, turbidite sand in the upper Akata Formation is a potential target in deep water offshore and possibly beneath currently producing intervals onshore.Known oil and gas resources of the Niger Delta rank the province as the twelfth largest in the world. To date, 34.5 billion barrels of recoverable oil and 93.8 trillion cubic feet of recoverable gas have been discovered. In 1997, Nigeria was the fifth largest crude oil supplier to the United States, supplying 689,000 barrels/day of crude.INTRODUCTION  The Niger Delta is situated in the Gulf of Guinea (fig. 1) and extends throughout the Niger Delta Province as defined by Klett and others (1997). 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). These depobelts form one of the largest regressive deltas in the world with an area of some 300,000 km2 (Kulke, 1995), a sediment volume of 500,000 km3(Hospers, 1965), and a sediment thickness of over 10 km in the basin depocenter (Kaplan and others, 1994).The Niger Delta Province contains only one identified petroleum system (Kulke, 1995; Ekweozor and Daukoru, 1994; this study). This system is referred to here as the Tertiary Niger Delta (Akata –Agbada) Petroleum System.1  The maximum extent of the petroleum system coincides with the boundaries of the province (fig. 1). The minimum extent of the system is defined by the areal extent of fields and contains known resources (cumulative production plus proved reserves) of 34.5 billion barrels of oil (BBO) and 93.8 trillion cubic feet of gas2 (TCFG) (14.9 billion barrels of oil equivalent, BBOE) (Petroconsultants, 1996a). Currently, most of this petroleum is in fields that are onshore or on the continental shelf in waters less than 200 meters deep (fig. 1), and occurs primarily in large, relatively simple structures. A few giant fields do occur in the delta, the largest contains just over 1.0 BBO (Petroconsultants, Inc., 1996a). Among the provinces ranked in the U.S. Geological Survey's World Energy Assessment (Klett and others, 1997), the Niger Delta province is the twelfth richest in petroleum resources, with 2.2% of the world’s discovered oil and 1.4% of the world’s discovered gas (Petroconsultants, Inc. 1996a).In 1908, the German Nigerian Bitumen Corporation drilled the first wells in the vicinity of the tar seep deposits in the northern portion of the delta (Frost, 1997). However, significant oil shows were not found in Tertiary rocks until the early 1950’s. Shell-British Petroleum brought the first well on stream in 1958 at 5,100 barrels per day. From 1958 until the Biafran War in 1967, exploration and production increased in Nigeria. The war curtailed both activities until its end in 1970, when world oil prices were rising and Nigeria again could...

References: CITED IN CHAPTER AAvbovbo, A. A., 1978, Tertiary lithostratigraphy of Niger Delta: American Association of Petroleum Geologists Bulletin, v. 62, p. 295-300.Beka, F. T., and Oti, M. N., 1995, The distal offshore Niger Delta: frontier prospects of a mature petroleum province, in, Oti, M.N., and Postma, G., eds., Geology of Deltas: Rotterdam, A.A. Balkema, p. 237-241.Burke, K., 1972, Longshore drift, submarine canyons, and submarine fans in development of Niger Delta: American Association of Petroleum Geologists, v. 56, p. 1975-1983.Bustin, R. M., 1988, Sedimentology and characteristics of dispersed organic matter in Tertiary Niger Delta: origin of source rocks in a deltaic environment: American Association of Petroleum Geologists Bulletin, v. 72, p. 277-298.Demaison, G., and Huizinga, B.J., 1994, Genetic classification of petroleum systems using three factors: charge, migration, and entrapment, in, Magoon, L.B., and Dow, W.G., eds., The Petroleum System--From Source to Trap, AAPG Memoir 60: Tulsa, American Association of Petroleum Geologists, p. 73-89.Doust, H., and Omatsola, E., 1990, Niger Delta, in, Edwards, J. D., and Santogrossi, P.A., eds., Divergent/passive Margin Basins, AAPG Memoir 48: Tulsa, American Association of Petroleum Geologists, p. 239-248.Edwards, J.D., and Santogrossi, P.A., 1990, Summary and conclusions, in, Edwards, J.D., and Santogrossi, P.A., eds., Divergent/passive Margin Basins, AAPG Memoir 48: Tulsa, American Association of Petroleum Geologists, P. 239-248.Ejedawe, J.E., 1981, Patterns of incidence of oil reserves in Niger Delta Basin: American Association of Petroleum Geologists, v. 65, p. 1574-1585.Ejedawe, J.E., Coker, S.J.L., Lambert-Aikhionbare, D.O., Alofe, K.B., and Adoh, F.O., 1984, Evolution of oil-generative window and oil and gas occurrence in Tertiary Niger Delta Basin: American Association of Petroleum Geologists, v. 68, p. 1744-1751.Ekweozor, C. M., and Daukoru, E.M, 1984, Petroleum source bed evaluation of Tertiary Niger Delta--reply: American Association of Petroleum Geologists Bulletin, v. 68, p. 390-394.Ekweozor, C. M., and Daukoru, E.M, 1994, Northern delta depobelt portion of the Akata-Agbada(!) petroleum system, Niger Delta, Nigeria, in, Magoon, L.B., and Dow, W.G., eds., The Petroleum System--From Source to Trap, AAPG Memoir 60: Tulsa, American Association of Petroleum Geologists, p. 599-614.Ekweozor, C. M., Okogun, J.I., Ekong, D.E.U., and Maxwell J.R., 1979, Preliminary organic geochemical studies of samples from the Niger Delta, Nigeria: Part 1, analysis of crude oils for triterpanes: Chemical Geology, v 27, p. 11-28.Ekweozor, C.M., and Okoye, N.V., 1980, Petroleum source-bed evaluation of Tertiary Niger Delta: American Association of Petroleum Geologists Bulletin, v. 64, p 1251-1259.Energy Information Administration, 1998a, <http://www.eia.doe.gov/emeu/cabs/ngriasar.html>Energy Information Administration, 1998b, <http://www.eia.doe.gov/emeu/world/country/cntry_NI.html>Evamy, B.D., Haremboure, J., Kamerling, P., Knaap, W.A., Molloy, F.A., and Rowlands, P.H., 1978, Hydrocarbon habitat of Tertiary Niger Delta: American Association of Petroleum Geologists Bulletin, v. 62, p. 277-298.Frost, B.R. ,1997, A Cretaceous Niger Delta Petroleum System, in, Extended Abstracts, AAPG/ABGP Hedberg Research Symposium, Petroleum Systems of the South Atlantic Margin, November 16-19, 1997, Rio de Janeiro, Brazil.GeoMark Research, Inc., 1998, OILS: Oil Information Library System, version 1.0: Houston, Texas, GeoMark Research, Inc., [database available from GeoMark Research, Inc., 9748 Whithorn Drive, Houston, TX 77095].Haack, R.C., Sundararaman, P., and Dahl, J., 1997, Niger Delta petroleum System, in, Extended Abstracts, AAPG/ABGP Hedberg Research Symposium, Petroleum Systems of the South Atlantic Margin, November 16-19, 1997, Rio de Janeiro, Brazil.Hospers, J., 1965, Gravity field and structure of the Niger Delta, Nigeria, West Africa: Geological Society of American Bulletin, v. 76, p. 407-422.Hunt, J.M., 1990, Generation and migration of petroleum from abnormally pressured fluid compartments: American Association of Petroleum Geologists Bulletin, v. 74, p. 1-12.Kaplan, A., Lusser, C.U., Norton, I.O., 1994, Tectonic map of the world, panel 10: Tulsa, American Association of Petroleum Geologists, scale 1:10,000,000. Klett, T.R., Ahlbrandt, T.S., Schmoker, J.W., and Dolton, J.L., 1997, Ranking of the world’s oil and gas provinces by known petroleum volumes: U.S. Geological Survey Open-file Report-97-463, CD-ROM.Kulke, H., 1995, Nigeria, in, Kulke, H., ed., Regional Petroleum Geology of the World. Part II: Africa, America, Australia and Antarctica: Berlin, Gebrüder Borntraeger, p. 143-172.Lambert-Aikhionbare, D. O., and Ibe, A.C., 1984, Petroleum source-bed evaluation of the Tertiary Niger Delta: discussion: American Association of Petroleum Geologists Bulletin, v. 68, p. 387-394.Lehner, P., and De Ruiter, P.A.C., 1977, Structural history of Atlantic Margin of Africa: American Association of Petroleum Geologists Bulletin, v. 61, p. 961-981.Lewan M.D., 1984, Factors controlling the proportionality of vanadium to nickel in the bitumen of organic sedimentary rocks: Geochimica et Cosmochimica Acta, v. 48, p. 2231-2238Lewan, M.D., and Maynard, J.B., 1982, Factors controlling enrichment of vanadium and nickel in the bitumen of organic sedimentary rocks: Geochimica et Cosmochimica Acta, v. 46, p. 2547-2560.Magoon, L.B., and Dow, W.G., 1994, the petroleum System, in, Magoon, L.B., and Dow, W.G., eds., The Petroleum System--from Source to trap, AAPG Memoir 60: Tulsa, American Association of Petroleum Geologists, p. 3-24.Mbendi, 1996, <http://mbendi.co.za/cyngoi.html>Nwachukwu, S.O., 1972, The tectonic evolution of the southern portion of the Benue Trough, Nigeria: Geology Magazine, v. 109, p. 411-419.Nwachukwu,J.I., and Chukwurah, P. I., 1986, Organic matter of Agbada Formation, Niger Delta, Nigeria: American Association of Petroleum Geologists Bulletin, v. 70, p. 48-55.Nwachkwu, J.I., Oluwole, A.F., Asubiojo, O.I., Filby, R.H., Grimm, C.A., and Fitzgerald, S., 1995, A geochemical evaluation of Niger Delta crude oils, in, Oti, M.N., and Postma, G., eds., Geology of Deltas: Rotterdam, A.A. Balkema, p. 287-300.Oluwole, A.F., Adegoke, O.S., Kehinde, L.O. et al., 1985, Chemical composition of bitumen extracts from Nigerian tar sands, in, 3rd. International UNITAR/UNDP Heavy Crude & Tar Sand conf., Long Beach, CA, USA, 22.--31.7.85, Preprints 1, 467-480.Persits, F., Ahlbrandt, T., Tuttle, M., Charpentier, R., and Brownfield, M., 1997, Map of the geology, oil and gas field, and geologic provinces of Africa, U.S. Geological Survey Open-file Report 97-470A, CD-ROM.Petroconsultants, 1996a, Petroleum exploration and production database: Houston, Texas, Petroconsultants, Inc., [database available from Petroconsultants, Inc., P.O. Box 740619, Houston, TX 77274-0619].Petroconsultants, 1996b, PetroWorld 21: Houston, Texas, Petroconsultants, Inc., [database available from Petroconsultants, Inc., P.O. Box 740619, Houston, TX 77274-0619].Reed, K.J., 1969, Environment of deposition of source beds of high-wax oil: American Association of Petroleum Geologists Bulletin, v. 53, p. 1502-1506.Reijers, T.J.A., Petters, S.W., and Nwajide, C.S., 1997, The Niger Delta Basin, in Selley, R.C., ed., African Basins--Sedimentary Basin of the World 3: Amsterdam, Elsevier Science, pp. 151-172.Shannon, P. M., and Naylor N., 1989, Petroleum Basin Studies: London, Graham and Trotman Limited, p 153-169.Short, K. C., and Stäublee, A.J., 1965, Outline of geology of Niger Delta: American Association of Petroleum Geologists Bulletin, v. 51, p. 761-779.Smith-Rouch, L. S., Meisling, K.E., Hennings, P.E., and Armentrout, J.M., 1996, Tectono-stratigraphic computer experiments—Nigeria example: American Association of Petroleum Geologists Bulletin Abstracts, May 1996. Stacher, P., 1995, Present understanding of the Niger Delta hydrocarbon habitat, in, Oti, M.N., and Postma, G., eds., Geology of Deltas: Rotterdam, A.A. Balkema, p. 257-267.Thomas, 1995, Niger delta oil production, reserves, field sizes assessed: Oil & Gas Journal, November 13, 1995, p. 101-103.Tissot, B.P., and Welte, D.H., 1984, Petroleum Formation and Occurrence: Berlin, Springer-Verlag, p. 518.UNESCO, 1990, International Geologic Map of Africa. Paris, CGMW and UNESCO, scale 1:5,000,000.Udo, O.T., and Ekweozor C.M., 1988, Comparative source rock evaluation of Opuama Channel Complex and adjacent producing areas of Niger delta: Nigerian Association of Petroleum Explorationists Bulletin, 3, n. 2, p. 10-27.Udo, O.T., Ekweozor, C.M., and Okogun, J.I., 1988, Petroleum geochemistry of an ancient clay-filled canyon in the western Niger delta, Nigeria: Nigerian Association of Petroleum Explorationists Bulletin, v. 3, p. 8-25.Weber, K.J., 1987, Hydrocarbon distribution patterns in Nigerian growth fault structures controlled by structural style and stratigraphy: Journal of Petroleum Science and Engineering, v. 1, p. 91-104.Weber, K. J., and Daukoru, E.M., 1975, Petroleum geology of the Niger Delta: Proceedings of the Ninth World Petroleum Congress, volume 2, Geology: London, Applied Science Publishers, Ltd., p. 210-221.Whiteman, A., 1982, Nigeria: Its Petroleum Geology, Resources and Potential: London, Graham and Trotman, 394 p.Xiao, H., and Suppe, J., 1992, Origin of rollover: American Association of Petroleum Geologists Bulletin, v. 76, p. 509-229. |
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