地球科学前沿    Vol.4 No.2 (April 2014)

东非裂谷系西支(湖区)油气资源潜力评价与分析
The Assessment and Analysis of the Potential of Oil and Gas Resources in Western Branch (Lakes) of the East African Rift

作者: 郭曦泽 , 侯贵廷 ：教育部造山带与地壳演化重点实验室，北京大学地球与空间科学学院，北京;

关键词: 东非裂谷系西支； 湖区； 构造演化； 沉积历史； 油气地质； Western Branch of the East African Rift； Lakes； Tectonic Evolution； Sedimentary History； Petroleum Geology

摘要:
随着油气资源的需求量不断增加，东非裂谷系西支(部分湖区)作为未来油气资源勘探的潜力地区，其勘探程度一直较低。由于各个盆地具有相对不同的沉积历史，为了掌握东非裂谷系西支的勘探前景，需要对各盆地及次级盆地进行详细的研究。本文从东非裂谷的整体地质概况开始，分析了东非裂谷的构造演化，将西支7个主要的地堑分别进行石油地质特征的研究，结合不同地区的勘探历史，得出对东非裂谷西支(湖区)油气资源的评价结果。认为Albert地堑和Tanganyika地堑油气资源很丰富，勘探潜力很大；Malawi地堑(Nyasa地堑)、Rukwa地堑、Ruhuhu地堑油气资源较为丰富，虽然勘探力度不足，但也具有一定的勘探潜力。

Abstract: With the increasing demand for oil and gas resources, part of the lakes of the western branch of the East African Rift, regarded as a potential area of oil and gas exploration in the future, have maintained a low level of exploration. Since each basin has a relatively different sedimentary history, we need to make exploration of each basin and sub-basin in detail to grasp the exploration prospects of the East African Rift System. In this paper, starting from the overall geological setting of the East African Rift, we analyze the tectonic evolution of the East African Rift, study the petroleum geological features of seven major grabens of the western branch, then combine with the exploration history of different regions, and we obtain the evaluation results of the western branch (Lakes) of the East African Rift. We think that the oil and gas resources of Albert Graben and Tanganyika Graben are very rich and have a great exploration potential; the oil and gas resources of Malawi Grabens (Nyasa Grabens), Rukwa Grabens, Ruhuhu Grabens are abundant. Although there is a lack of exploration and development, they still have a certain exploration potential.

文章引用: 郭曦泽 , 侯贵廷 (2014) 东非裂谷系西支(湖区)油气资源潜力评价与分析。 地球科学前沿， 4， 94-103. doi: 10.12677/AG.2014.42012

参考文献

[1] Morley, C.K., Ngenoh, D.K. and Ego, J.K. (1999) Introduction to the East African Rift System. American Association of Petroleum Geologists, 44, 1-18.

[2] 张可宝, 史卜庆, 徐志强, 等 (2008) 东非地区沉积盆地油气潜力浅析. 天然气地球科学, 6,869-874.

[3] 温志新, 童晓光, 张光亚, 等 (2012) 东非裂谷系盆地群石油地质特征及勘探潜力. 中国石油勘探, 4,60-65.

[4] Corti, G. (2009) Continental rift evolution, from rift initiation to incipient break-up in the Main Ethiopian Rift, East Africa. Earth-Science Reviews, 1, 1-53.

[5] Klerkx, J., Theunissen, K. and Delvaux, D. (1998) Persistent fault controlled basin formation since the Proterozoic along the Western Branch of the East African Rift. Journal of African Earth Sciences, 3, 347-361.

[6] Chakrabarti, R., Basu, A.R., Santo, A.P., et al. (2009) Isotopic and geochemical evidence for a heterogeneous mantle plume origin of the Virungavolcanics, Western rift, East African Rift system. Chemical Geology, 3, 273-289.

[7] Delvaux, D., Kervyn, F., Macheyeki, A.S., et al. (2012) Geodynamic significance of the TRM segment in the East African Rift (W-Tanzania), active tectonics and paleostress in the Ufipa plateau and Rukwa basin. Journal of Structural Geology, 37, 161-180.

[8] Chorowicz, J., Le Fournier, J. and Vidal, G. (1987) A model for rift development in eastern Africa. Geological Journal, 22, 495-513.

[9] Lindenfeld, M., Rümpker, G., Link, K., et al. (2012) Fluid-triggered earthquake swarms in the Rwenzori region, East African Rift—Evidence for rift initiation. Tectonophysics, 566, 95-104.

[10] Lærdal, T. and Talbot, M.R. (2002) Basin neotectonics of Lakes Edward and George, East African Rift. Palaeogeography, Palaeoclimatology, Palaeoecology, 187, 213-232.

[11] Smith, B. and Rose, J. (2002) New basin exploration-1; Uganda’s Albert Graben due first serious exploration test. Oiland Gas Journal, 100, 42-48.

[12] Smith, B. and Rose, J. (2002) New basin exploration-2; Meeting exploration challenges in Uganda’s remote Albert Graben. Oil and Gas Journal, 100, 36-39.

[13] Lezzar, K.E., Tiercelin, J.J., De Batist, M., et al.(1996) New seismic stratigraphy and Late Tertiary history of the North Tanganyika Basin, East African RiftSystem, deduced from multichannel and high-resolution reflection seismic data and piston core evidence. Basin Research, 8, 1-28.

[14] Morley, C.K., Wescott, W.A., Harper, R.M., et al. (1999) Geology and geophysics of the Rukwa Rift. American Association of Petroleum Geologists Studies in Geology, 44, 91-110.

[15] Dixey, F. (1941) The Nyasa rift valley. South African Geographical Journal, 23, 21-45.

分享
Top