Discovery of Fans in Melut Rift Basin,South Sudan and Its Petroleum Geological Significance&nbsp;

SHI Zhong-sheng，WANG Tian-qi，FANG Le-hua，HE Wei-wei，BAI Jie，SU Yu-ping，PANG Wen-zhu

doi:10.11764/j.issn.1672-1926.2015.01.0081

Natural Gas Geoscience >

2015 , Vol. 26 >Issue 1: 81 - 89

DOI: https://doi.org/10.11764/j.issn.1672-1926.2015.01.0081

Discovery of Fans in Melut Rift Basin,South Sudan and Its Petroleum Geological Significance

Expand

1.Research Institute of Petroleum Exploration & Development-Northwest,PetroChina,Lanzhou 730020,China；
2.Key Laboratory of Reservoir Characterization,CNPC,Lanzhou 730020,China；
3.China Petroleum and Natural Gas Exploration and Development Company,Beijing 100083,China

Received date: 2014-05-12

Revised date: 2014-08-01

Online published: 2015-01-10

Fold

Abstract

Melut Basin is a rift basin formed under the control of central Africa shear zone,with the passive rift basin character in Cretaceous and active rift basin character in Tertiary.In the long exploration activity,braided river and braided delta are the main exploration targets.By integrating geological and geophysical methods,the study identified a series of fans in North Melut sub-basin,including Abyat fan delta in the east of the sub-basin and Ruman subaqueous fans in west of the sub-basin.The fans mainly formed in the initial passive rift stage of Melut Basin and developed in the Cretaceous source rock of Al Renk Formation and formations close to the source rocks,such as Galhak Formation and Al Gayger Formation,with good oil source and reservoir-caprock assemblage.The discovery of fans in Melut Basin proved that central Africa Rift Basins also can develop fan deltas and subaqueous fans with good accumulation conditions and potential in the initial passive rift stage just like active rift basins.The research further expands the exploration potential and space for central Africa Rift Basins.

Key words： South Sudan; Melut Basin; Passive Rift Basin; Subaqueous fan; Fan delta

Cite this article

SHI Zhong-sheng，WANG Tian-qi，FANG Le-hua，HE Wei-wei，BAI Jie，SU Yu-ping，PANG Wen-zhu . Discovery of Fans in Melut Rift Basin,South Sudan and Its Petroleum Geological Significance [J]. Natural Gas Geoscience, 2015 , 26(1) : 81 -89 . DOI: 10.11764/j.issn.1672-1926.2015.01.0081

References

［1］Rosendahl B R.Architecture of continental rifts with special reference to East Africa[J].Annual Review Earth Planetary Science,1987,15:445-503.
［2］Lowell J D.Structural Styles in Petroleum Exploration［M］.Tulsa,Oklahom:Oil and Gas Consultants International Inc.,1985:1-477.
［3］Turcotte D L,Emermann S H.Mechanisms of active and passive rifting[J].Tectonophysics,1983,94(1):39-50.
［4］Sengor A M C,Burke K.Relative timing of rifting and volcanism on earth and its tectonic implications[J].Geophysical Research Letters,1978,5(6):419-421.
［5］Wang Dongpo,Liu Li,Xue Linfu,et al.Geodynamic mechanisms for the formation of sedimentary basins and their classification[J].Sedimentary Facies and Palaeogeography,1998,18(3):8-10.［王东坡,刘立,薛林福,等.沉积盆地形成的地球动力学机制及其分类[J].岩相古地理,1998,18(3):8-10.］
［6］Dou Lirong,Pan Xiaohua,Tian Zuoji,et al.Hydrocarbon formation and distribution of rift basins in Sudan:A comparative analysis of them with rift basins in east China[J].Petroleum Exploration and Development,2006,33(3):255-261.［窦立荣,潘校华,田作基,等.苏丹裂谷盆地油气藏的形成与分布——兼与中国东部裂谷盆地对比分析[J].石油勘探与开发,2006,33(3):255-261.］
［7］Ouyang Wensheng,Zhang Zhihuan,Lu Huangsheng et al.Two extreme modes of reservoir sedimentation:Active rift and passive rift[J].Petroleum Exploration and Development,2007,34(6):687-690.［欧阳文生,张枝焕,陆黄生,等.储集层沉积的两种极端模式——主动裂谷和被动裂谷[J].石油勘探与开发,2007,34(6):687-690.］
［8］Jia Chengzao,Zhao Wenzhi,Zou Caineng,et al.Geological theory and exploration technology for lithostratigraphic hydrocarbon reservoirs[J].Petroleum Exploration and Development,2007,34(3):257-272.［贾承造,赵文智,邹才能,等.岩性地层油气藏地质理论与勘探技术[J].石油勘探与开发,2007,34(3):257-272.］
［9］Browne S E,Fairhead J D.Gravity study of the Central Africa Rift system:A model of continental disruption 1.The Ngaoundere and Abu Gabra Rifts[J].Tectonophysics,1983,94(1/4):187-203.
［10］Bermingham P M,Fairhead J D,Stuart G W.Gravity study of the Central African Rift system:A model of continental disruption 2.The Darfur domal uplift and associated Cainozoic volcanism[J].Tectonophysics,1983,94(1/4):205-222.
［11］Genik G J.Regional framework,structural and petroleum aspects of rift basins in Niger,Chad and the Central African Republic[J].Tectonophysics,1992,213(1/2):169-185.
［12］Guiraud R,Maurin J C.Early Cretaceous of western and Central Africa:An overview[J].Tectonophysics,1992,213(1/2):153-168.
［13］Mchargue T R,Heidrick T L,Livingston Jack E.Tectonostratigraphic development of the Interior Sudan rifts,Central Africa[J].Tectonophysics,1992,213(1/2):187-202.
［14］Genik G J.Petroleum geology of Cretaceous-Tertiary rift basins in Niger,Chad,and Central African Republic[J].AAPG Bulletin,1993,77(8):1405-1434.
［15］Wilson M,Guriaud R.Magmatism and rifting in Western and Central Africa,from Late Jurassic to recent times[J].Tectonophycics,1992,213(1/2),203-225.
［16］Jorgensen G J,Bosworth W.Gravity modeling in the Central African rift system,Sudan:Rift geometries and tectonic significance[J].Journal of African Earth Science,1989,8(2/3/4)：283-306.
［17］Tong Xiaoguang,Xu Zhiqiang,Shi Buqing,et al.Petroleum geologic property and reservoir-forming pattern of Melut Basin in Sudan[J].Acta Petrolei Sinica,2006,27(2):1-10.［童晓光,徐志强,史卜庆,等.苏丹迈卢特盆地石油地质特征及成藏模式[J].石油学报,2006,27(2):1-10.］
［18］Ibrahim A E,Ebinger C J,Fairhead J D.Lithospheric extension northwest of the Central African shear zone in Sudan from potential field studies[J].Tectonophycics,1996,255(1/2):79-97.
［19］Schull T J.Rift basins of Interior Sudan:Petroleum exploration and discovery[J].AAPG Bulletin,1988,72(10):1128-1142.
［20］Dou Lirong.Formation mechanism and model of oil and gas accumulations in the Melut Basin,Sudan[J].Bulletin of Mineralogy Petrology and Geochemistry,2005,24(1):50-57.［窦立荣.苏丹迈努特盆地油气成藏机理和成藏模式[J].矿物岩石地球化学通报,2005,24(1):50-57.］
［21］Lirong Dou,Kunye Xiao,Dingsheng Cheng,et al.Petroleum geology of the Melut Basin and the Great Palogue Field,Sudan[J].Marine and Petroleum Geology,2007,24(3):129-144.［22］Zhao Chenglin,Liu Menghui,Ji Youliang.Epositional Systems and Diagenesis of Lower Tertiary Clastic Rocks in Dongpu Sag［M］.Beijing:Petroleum Industry Press,1992.［赵澄林,刘孟慧,纪友亮.东濮凹陷下第三系碎屑岩沉积体系与成岩作用［M］.北京:石油工业出版社,1992.］
［23］Yu Xinghe.Clastic Reservoir Sedimentology［M］.Beijing:Petroleum Industry Press,2008.［于兴河.碎屑岩系油气储层沉积学［M］.北京:石油工业出版社,2008.］
［24］Kang Renhua,Liu Kuiyuan,Zhao Cuixia,et al.Sedimentary facies of the Shahejie Formation of Paleogene in Bonan sag of Jiyang Depression[J].Journal of Palaeogeography,2002,4(4):20-22.［康仁华,刘魁元,赵翠霞,等.济阳坳陷渤南洼陷古近系沙河街组沉积相[J].古地理学报,2002,4(4):20-22.］
［25］Zhou Shuxin,Wright V P,Pratt N H,et al.Lake Depositional System and Oil and Gas［M］.Beijing:Science Press,1991.［周书欣,赖特V P,普拉特N H,等.湖泊沉积体系与油气［M］.北京:科学出版社,1991.］
［26］Zhao Hongbing,Yan Ke.Depositional characteristics of glutenite and distribution pattern of fan on nearshore subaqueous fan[J].Fault-Block Oil & Gas Field,2001,18(4):438-441.［赵红兵,严科.近岸水下扇砂砾岩沉积特征及扇体分布规律[J].断块油气田,2001,18(4):438-441.］

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article

References