Miocene stratigraphic characteristics of Semliki basin in Albertine Graben
|
摘要
For the purpose of reservoir characterization of oilfields discovered in Albertine Graben, it is necessary to study the regional stratigraphy and sedimentary characteristics. The Semliki outcrops display a complete stratigraphy of Miocene, and the sediments are likely to provide valuable analogues for the reservoirs at Albertine Graben oilfields. The outcrops were observed and described in detail, mainly including lithology, colour, thickness, grain size and sedimentary structure. The sedimentology, depositional environment, climate, reservoir geometries and dimensions were analyzed. The Miocene stratigraphic section of Semliki basin was finally established, with lithology, sedimentary structure, sedimentary cycle, interpretation and climate information on it. It provides an analogy for the reservoir characterization, especially provides a basis for appropriate prediction of reservoir geometries in the field.
For the purpose of reservoir characterization of oilfields discovered in Albertine Graben, it is necessary to study the regional stratigraphy and sedimentary characteristics. The Semliki outcrops display a complete stratigraphy of Miocene, and the sediments are likely to provide valuable analogues for the reservoirs at Albertine Graben oilfields. The outcrops were observed and described in detail, mainly including lithology, colour, thickness, grain size and sedimentary structure. The sedimentology, depositional environment, climate, reservoir geometries and dimensions were analyzed. The Miocene stratigraphic section of Semliki basin was finally established, with lithology, sedimentary structure, sedimentary cycle, interpretation and climate information on it. It provides an analogy for the reservoir characterization, especially provides a basis for appropriate prediction of reservoir geometries in the field.
For the purpose of reservoir characterization of oilfields discovered in Albertine Graben, it is necessary to study the regional stratigraphy and sedimentary characteristics. The Semliki outcrops display a complete stratigraphy of Miocene, and the sediments are likely to provide valuable analogues for the reservoirs at Albertine Graben oilfields. The outcrops were observed and described in detail, mainly including lithology, colour, thickness, grain size and sedimentary structure. The sedimentology, depositional environment, climate, reservoir geometries and dimensions were analyzed. The Miocene stratigraphic section of Semliki basin was finally established, with lithology, sedimentary structure, sedimentary cycle, interpretation and climate information on it. It provides an analogy for the reservoir characterization, especially provides a basis for appropriate prediction of reservoir geometries in the field.
引文
Ainsworth R B. 2005. Sequence stratigraphic-based analysis of reservoir connectivity: influence of depositional architecture: a case study from a marginal marine depositional setting. Petroleum Geoscience, 11: 257-276.
Cheng D S, Dou L R, Wang J J, et al. 2002. Geological characteristics of shales and oil seepages in the Albertine Graben, Uganda. Geochemical, 31(6): 532-538. (in Chinese with English abstract)
Chorowicz J. 2005. The East African rift system. Journal of African Earth Sciences, 43: 379-410.
Dou L R, Wang J J, Chen D S, et al. 2004. Geological conditions and petroleum exploration potential of the Albertine Graben of Uganda. Acta Geologica Sinica, 78(4): 1002-1010.
Kampunzu A, Bonhomme M, Kanika M. 1998. Geochronology of volcanic rocks and evolution of the Cenozoic Western Branch of the East African Rift System. Journal of African Earth Sciences, 26(3): 441-461.
Karner G D, Byamungu B R, Ebinger C J, et al. 2000. Distribution of crustal extension and regional basin architecture of the Albertine rift system, East Africa. Marine and Petroleum Geology, 17: 1131-1150.
Morley C K, Nelson R A, Patton T L, et al. 1990. Transfer zones in the East African Rift system and their relevance to hydrocarbon exploration in rifts. AAPG Bull., 74: 1234-1253.
Nelson R A, Patton T L, Morley C K. 1992. Rift-segment interaction and its relation to hydrocarbon exploration in continental rift systems. AAPG Bull., 76: 1153-1169.
Pickford M, Senut B, Adoto D. 1993. Geology and palaeobiology of the Albertine rift valley Uganda-Zaire: geology, vol. 1. CIFEG Orleans: Occasional Publication, 179.
Ring U. 2008. Extreme uplift of the Rwenzori Mountains in the East African Rift, Uganda: structural framework and possible role of glaciations. Tectonics, 27: 4018.
Wen Z X, Tong X G, Zhang G Y, et al. 2012. Petroleum geology features and exploration potential of basin group in East African Rift System. China Petroleum Exploration, (4): 60-65. (in Chinese with English abstract)
Yang X P, Gu L, Zhao P F, et al. 2014. The classifying and modeling of reservoir rock types in the development planning stage of an undeveloped oilfield. Petroleum Science and Technology, 32: 2405-2413.
Zhang X, Tong X G. 2001. Hydrocarbon prospective evaluation of Albert rift basin: an example of evaluation about least explored basins. Petroleum Exploration and Development. 28(2): 102-106. (in Chinese with English abstract)
Cheng D S, Dou L R, Wang J J, et al. 2002. Geological characteristics of shales and oil seepages in the Albertine Graben, Uganda. Geochemical, 31(6): 532-538. (in Chinese with English abstract)
Chorowicz J. 2005. The East African rift system. Journal of African Earth Sciences, 43: 379-410.
Dou L R, Wang J J, Chen D S, et al. 2004. Geological conditions and petroleum exploration potential of the Albertine Graben of Uganda. Acta Geologica Sinica, 78(4): 1002-1010.
Kampunzu A, Bonhomme M, Kanika M. 1998. Geochronology of volcanic rocks and evolution of the Cenozoic Western Branch of the East African Rift System. Journal of African Earth Sciences, 26(3): 441-461.
Karner G D, Byamungu B R, Ebinger C J, et al. 2000. Distribution of crustal extension and regional basin architecture of the Albertine rift system, East Africa. Marine and Petroleum Geology, 17: 1131-1150.
Morley C K, Nelson R A, Patton T L, et al. 1990. Transfer zones in the East African Rift system and their relevance to hydrocarbon exploration in rifts. AAPG Bull., 74: 1234-1253.
Nelson R A, Patton T L, Morley C K. 1992. Rift-segment interaction and its relation to hydrocarbon exploration in continental rift systems. AAPG Bull., 76: 1153-1169.
Pickford M, Senut B, Adoto D. 1993. Geology and palaeobiology of the Albertine rift valley Uganda-Zaire: geology, vol. 1. CIFEG Orleans: Occasional Publication, 179.
Ring U. 2008. Extreme uplift of the Rwenzori Mountains in the East African Rift, Uganda: structural framework and possible role of glaciations. Tectonics, 27: 4018.
Wen Z X, Tong X G, Zhang G Y, et al. 2012. Petroleum geology features and exploration potential of basin group in East African Rift System. China Petroleum Exploration, (4): 60-65. (in Chinese with English abstract)
Yang X P, Gu L, Zhao P F, et al. 2014. The classifying and modeling of reservoir rock types in the development planning stage of an undeveloped oilfield. Petroleum Science and Technology, 32: 2405-2413.
Zhang X, Tong X G. 2001. Hydrocarbon prospective evaluation of Albert rift basin: an example of evaluation about least explored basins. Petroleum Exploration and Development. 28(2): 102-106. (in Chinese with English abstract)