苏丹Melut盆地构造、沉积和油气成藏研究
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摘要
Melut盆地属于拉张裂陷中的弱反转被动裂谷盆地,具有裂谷盆地典型的构造特征。综合运用各类资料,在研究层位白垩系—古近系共识别出从SB1到SB8的8个层序界面,建立了全盆地的白垩系—古近系层序地层格架。与Melut盆地在白垩纪和古近纪经历的三个裂陷阶段和一个坳陷阶段相对应,划分为4个长期基准面旋回,分别是K1段、K2段、Samma-Lau组和Jimidi-Agor组。
     通过钻/测井相、地震相和少量岩心分析,并结合重矿物、粒度分析等资料,在Melut盆地识别出了辫状三角洲体系、扇三角洲体系、河道-冲积平原体系、滑塌浊积扇和湖相等5种沉积体系类型。沉积特征和充填演化过程表现为:盆地地形高差相对不大,宏观沉积相带分异性不明显;两次强裂陷阶段形成了厚层烃源岩和大套稳定泥岩盖层;盆地构造格局相对稳定,物源方向具有继承性,岩石成分单一;盆地内的构造调节带控制了大型砂体的展布。
     Melut盆地从早白垩世到古近纪强烈的伸展断陷活动,为盆地广泛形成断陷型深湖盆和优越的成烃环境,为富油气凹陷的形成提供了先决条件。盆地内多个凹陷就属于这类湖盆,如北部凹陷、东部凹陷、中部凹陷、西部凹陷和南部凹陷。勘探实践表明,每个裂陷期形成一套烃源层,控制着一定地质时期的富油气区从盆地演化史、沉积层序特征及地球化学分析来看,Melut盆地应以白垩系烃源岩为主。
     根据Melut盆地的构造发育、沉积演化、石油地质特征,建立了油气跨时代聚集的模式。紧紧围绕Melut盆地白垩系生油、古近系储油这一明显不同于Muglad和Doba等盆地的特点,提出了一系列新观点,包括:“晚期增温”导致盆地热演化时间迟滞,控制了晚期排烃和晚期成藏,油气跨越巨厚储层段进行长距离垂向和侧向运移,并在盆地横向构造调节带上优势聚集等,丰富了裂谷盆地的石油地质学,达到了国际领先水平。
     明确了北部凹陷是一个富油气系统,通过对地层、构造、成藏组合等条件分析和成藏组合研究,在Melut盆地北部共划分了10个有利的成藏带,这些成藏带一般以背斜圈闭为主,Yabus和Samma组砂体发育,单储系数高。为进一步新增储量奠定了坚实的基础,为进一步勘探提供了新的接替区。
Melut basin is a weakly-inversed passive rift basin within extension tectonic background and demonstrates typical tectonic features of intra-cratonic rift basin. Comprehensively applying many kinds of data, this paper established the stratigraphical framework from Cretaceous to Paleogene formations in the basin after divided eight sequence boundaries from SB1 to SB8 in Cretaceous -Paleogene ages. The paper also set up four long-term base-level cycles, including Early Cretaceous, Late Cretaceous, period from Samma Fm to Lau Fm and period from Jimidi Fm to Agor Fm, which correspond with the three rifting stages and one depressing stage during Cretaceous -Paleogene ages in the basin.
     Five sedimentary systems were identified based on drilling data, log facies, seismic facies and results of core analysis, together with results of heavy mineral and grain-size analysis. These systems include braided river delta, fan delta, river-alluvial plain, collapse turbidite fan and lacustrine facies. Sedimentary features of the basin and its filling evolution history are resulted from low intra-basin relief, indistinct differentiation of macro-facies, thick source rocks and cap rocks, relatively stable tectonic architecture and successive provenance with simple ingredient composition; consequently, distribution of major sand bodies in the basin was controlled by the structural accommodation zones.
     The intense rifting activities from Early Cretaceous to Paleogene had resulted in a quite favorable framework for development of deep lacustrine lakes and source-rich depressions. Both are fundamental elements for hydrocarbon-rich depressions. North depression is a depression of such kind in the basin. Exploration practices demonstrate that one set of source rock deposited in a given depression during a rifting stage controls its hydrocarbon distribution. The predominant source rock in the basin is Cretaceous shales based on tectonic evolution history, characters of stratigraphical sequences and geochemistry analysis.
     Era-spanning pattern of hydrocarbon enrichment was established based on tectonic development and sedimentary evolution of the basin and its Petroleum geologic properties . The pattern is distinguishable from that in Muglad and Doba basin. Several new viewpoints have been put forward based on the distinct features of hydrocarbon enrichment in the basin, where hydrocarbon was sourced by Cretaceous lacustrine shales and accumulated in Paleogene reservoir. These viewpoints include that "late geothermal increment" led to delay of thermal evolution and controlled late hydrocarbon migration and enrichment subsequently, and hydrocarbon was trapped predominately in the structural accommodation zones after migrating through a series of strata with giant thickness vertically and long distance horizontally. These new viewpoints have broadened the knowledge of petroleum geology of rift basin and reached international advanced level.
     The north depression has been recognized as an oil-rich petroleum system according to results of stratigraphical, structural studis and accumulation assemblage analysis. Ten favorable plays have been identified in the basin. These plays are rich of sand bodies in Yabus and Samma formations with high reserves per unit volume and possess anticlines as the main structure style. These conclusions have laid a sound foundation for the new discoveries and put forward subsequent prospective areas for the future exploration campaigns.
引文
1.包建平,王铁冠,脱羟基维生素E及其地球化学意义。江汉石油学院学报,1989,11(3):11-17。
    2.包建平,王铁冠,周玉琦等,1992,甲基菲比值与有机质热演化的关系。江汉石油学院学报,14(2):8-13。
    3.蔡功进,姜秀芳,范存堂,1995,东营盆地始新统沉积体系及盆地演化。沉积学报,V.13,增刊。
    4.陈丹玲等,2001,陕西山阳盆地白垩系-古近系界限地层地球化学特征及其古气候意义,西北大学学报(自然科学版),31(4):157-162。
    5.戴俊生,陆克政,漆家福等,1998,渤海湾盆地早第三纪构造样式的演化。石油学报,19(4):15-19。
    6.邓宏文,王红亮等,1996,层序地层地层基准面的识别、对比技术及应用。石油与天然气地质,17(3)。
    7.邓宏文,王红亮等,1997,鄂尔多斯盆地晋西地区山西组层序地层与储层特征,层序地层及其在油气勘探开发中的应用,石油工业出版社。
    8.邓宏文,王红亮,李小猛,1997,高分辨率层序地层在河流相储层分析中的应用。石油与天然气地质,18(2)。
    9.邓宏文,王红亮,宁宁,2000,沉积物体积分配原理-高分辨率层序地层学的理论基础。地学前缘,No.4。
    10.邓宏文,王红亮,祝永军,T.A.Cross,2002,高分辨率层序地层学—原理及应用。地质出版社。
    11.窦立荣等,1999,苏丹Muglad盆地六区含油气系统研究和勘探目标选择与评价,石油勘探开发研究院(内部资料)。
    12.窦立荣,2001,油气藏地质学概论。北京:石油工业出版社。
    13.窦立荣等译,2002,Peter R.Rose著,油气勘探投资的风险分析与管理。北京:石油工业出版社。
    14.窦立荣,程顶胜,张志伟,2002,利用油藏地质地球化学特征综合划分含油气系统。地质科学,37(4):495-501
    15.樊太亮,黄伟,2000,苏丹Muglad盆地一区Abu Gabra组层序地层分析。中国地质大学(科研报告)。
    16.范迎风,苌衡等,2002,转换型Muglad盆地的走滑特征。石油勘探与开发,No.3。
    17.冯建辉、张亚敏等,2001,FL走滑型断陷油气富集特征。石油勘探与开发,No.6。
    18.冯亚东,2003,苏丹六区地层岩性特征及分层依据。内蒙古石油化工,Vol.29,No.3。
    19.付广,许凤鸣,2003,盖层厚度对封闭能力控制作用分析。天然气地球科学,14(3)。
    20.付广,陈章明等,1998,泥质岩盖层封盖性能综合评价方法探讨。石油实验地质,20(1)。
    21.甘克文,李国玉等,1984,世界含油气盆地图集。石油工业出版社。
    22.顾家裕等,1997,层序地层学及其在油气勘探开发中的应用论文集。石油工业出版社。
    23.胡朝元,孔志平等,2002,油气成藏原理。北京:石油工业出版社。
    24.胡见义,黄第藩等,1991,中国陆相石油地质理论基础。石油工业出版社。
    25.姜乃煌等译,1995,生物标记化合物指南—古代沉积物和石油中分子化石的解释。石油工业出版社。
    26.孔自超,李雷等,2001,苏丹六区区域勘探的重大发现及其意义。断块油气田,No.4。
    27.李国平等,1995,测井地质及油气评价新技术。石油工业出版社。
    28.李厚义等,2002,对低电阻率油层的一个误解及修正。测井技术,26(2):148-149。
    29.李景明,魏国齐等,中国大中型气田富集区带。北京:地质出版社,2002。
    30.李丕龙,富油断陷盆地油气环状分布与惠民凹陷勘探方向。石油实验地质,2001,23(2):146-148。
    31.林壬子,1998,油气勘探与油藏地球化学。北京:石油工业出版社。
    32.刘立、汪筱林,1994,当前沉积盆地研究的若干进展。世界地质,Vol.13,No.1。
    33.刘洛夫,徐新德等,1997,咔唑类化合物在油气运移研究中的应用初探。科学通报,42(4):420-422。
    34.刘兆生,2000,甘肃玉门旱峡早白垩世孢粉组合。微体古生物学报,17(3): 73-84。
    35.罗小平、王伟栋等,2003,苏丹M盆地萨加隆起储层包裹体特征与地热史研究,矿物岩石,No.3。
    36.罗小平、王海宏等,2003,苏丹M盆地萨加隆起储层有机包裹体地球化学特征。成都理工大学学报(自然科学版),No.3。
    37.罗小平、张同周等,2003,苏丹M盆地原油地球化学特征与母质的沉积环境探讨。地质地球化学,No.2。
    38.吕延仓等,2000,苏丹37区勘探开发可行性研究报告。中国石油化工集团公司中原石油勘探局(内部报告)。
    39.吕延仓、何碧竹等,2001,中非穆格莱德盆地福拉凹陷石油地质特征及勘探前景。石油勘探与开发,No.3。
    40.毛志强等,1999,塔里木盆地油气层低阻成因实验研究(Ⅰ)。测井技术,23(4):243-248。
    41.牛毓荃,徐怀大等译,C.E.佩顿编,1980,地震地层学(在油气勘探中的应用),石油工业出版社。
    42.欧朝阳等,2001,泌阳凹陷复杂油藏低阻油层测井解释方法及应用。测井技术,25(1):31-37。
    43.欧阳健等,1998,渤海湾油区测井低电阻油层勘探潜力分析。勘探家,3(4):37-42。
    44.欧阳健,王贵文等,1999,测井地质分析与油气层评价技术。北京:石油工业出版社,158~169。
    45.欧阳健等,2000,渤海湾地区低电阻油气层测井技术与解释方法。北京:石油工业出版社。
    46.欧阳健,2002,油藏中饱和度-电阻率分布规律研究。北京:石油勘探与开发,29(3):44-47。
    47.裘怿南,薛叔浩,应凤祥,1997,中国陆相油气储集层。石油工业出版社。
    48.孙贵霞,2000,歧50断块低阻油层研究。测井技术,24(4):291-294。
    49.孙黎娟,吴凡等,2001,M盆地淡水地层油层电性标准研究。测井技术,25(3):212-214。
    50.陶晓风,刘登忠,朱利东,2001,陆相盆地沉积作用与构造作用的关系。沉积学报,19(3)。
    51.童晓光,何登发,2001,油气勘探原理和方法。石油工业出版社。
    52.童晓光、窦立荣等,2003,21世纪初中国跨国油气勘探开发战略研究,石油工业出版社。
    53.童晓光等,2002,苏丹Muglad盆地1/2/4区高效勘探的理论与实践,CNODC内部资料。
    54.万从礼,金强,2000,花沟地区单断湖盆陡坡带和缓坡带沉积体系的组成与识别。石油大学学报(自然科学版),24(1)。
    55.王德发,孙永传等,1983,中国东部新生代滨海湖断陷盆地的沉积模式及油气分布。石油地质文集7—沉积相。地质出版社。
    56.王婧韫等,2001,FL走滑型断陷油气富集特征。石油勘探与开发,Vol.28,No.6。
    57.王骏,王东坡等,1997,裂谷盆地形成的动力学机制及其含油气性。长春地质学院学报,Vol.27,No.1。
    58.王培荣,1993,生物标志物质量色谱图集。北京:石油工业出版社。
    59.王培荣,生物标志物地球化学(内部资料)。
    60.汪望泉等,2001,中非穆格莱德盆地福拉凹陷石油地质特征及勘探前景。石油勘探与开发,Vol.28,No.3。
    61.王香婷,毕力刚,1998,渤海地区中侏罗世和早白垩世孢粉组合。中国海上油气(地质),12(5):318-328。
    62.魏永佩等,2003,位于巨型走滑断裂端部盆地演化的地质模型—以苏丹穆格莱德盆地为例。石油实验地质,Vol.25,No.2。
    63.吴崇筠,薛叔浩等,1992,中国含油气盆地沉积学,石油工业出版社。
    64.肖坤叶,黄人平等,2002,苏丹3/7区Melut盆地含油气系统研究与目标评价,CNODC研究中心科研报告。
    65.徐怀大,王世凤,陈开远,1990,地震地层学解释基础。中国地质大学出版社。
    66.徐志强等,1997,影响深层碎屑岩次生孔隙发育的因素。沉积学报,Vol.15 增刊:102-105。
    67.杨明慧,刘池阳,孙冬胜等,2002,冀中坳陷的伸展构造系统及其构造背景。大地构造与成矿学,26(2):113-120。
    68.于兴河编著,2002,碎屑岩系油气储层沉积学。石油工业出版社。
    69.岳华,张洪波,2002,Geosec平衡剖面技术在M盆地构造研究中的应用。勘 探地球物理进展,No.4。
    70.杨巍然、孙继源等,1994,大陆裂谷对比。中国地质大学出版社。
    71.杨巍然、纪克诚等,1995,大陆裂谷研究中的几个前沿课题。地学前沿,Vol.2,No.1—2。
    72.曾文冲,1991,油气藏储集层测井评价技术。北京:石油工业出版社,67-70。
    73.张厚福,方朝亮,1999,石油地质学。北京:石油工业出版社。
    74.张淑芹,刘伟强,郭军,2000,松辽盆地东南部晚侏罗世-早白垩世孢粉组合特征。大庆石油地质与开发,19(1):8-9。
    75.张新建等,2001,N凹陷的油源判识。石油与天然气地质,Vol.22,No.3。
    76.张新建,邓君,2003,油源对比对凹陷勘探的指导意义。河南石油,No.2。
    77.张亚敏,陈发景,2002,穆格莱德盆地形成特点与勘探潜力。石油与天然气地质,Vol.23,No.3。
    78.张亚敏等,2002,M走滑盆地形成演化与油气勘探。断块油气田,Vol.9,No.4。
    79.张亚敏等,2002,M盆地走滑特征与油气富集规律。西北大学学报(自然科学版),Vol.32,No.3。
    80.张一勇,李建国,2000,第三纪年代地层研究和中国第三纪年代地层表。地层学杂志,24(2):120。
    81.张映红译,S.Julio Friedmann,1997,裂陷盆地与强折离盆地。世界地质,Vol.16,No.4。
    82.赵澄林等,2001,油区岩相古地理。石油大学出版社。
    83.赵文智,何登发,1999,石油地质综合研究导论。石油工业出版社。
    84.中国地质大学能源系,2003,苏丹3/7区Melut盆地中北部Yabus-Adar组层序地层及储层预测(内部报告)。
    85.中国石油勘探开发公司研究中心,2002,苏丹3/7区Melut盆地含油气系统研究与目标评价(内部报告)。
    86.中国石油天然气勘探开发公司第一届勘探技术交流会文集,2002。
    87.周荣安等,2002,低电阻率油层解释方法。测井技术,26(3):201-204。
    88.周永胜,王绳祖,1999,裂陷盆地成因研究现状综述与讨论。地球物理学进展,第14卷,第3期。
    89.朱海虹,1988,断陷盆地沉积模式与石油分布的关系。《碎屑岩沉积相研究》,中国石油学会石油地质委员会编。
    90.朱扬明,1999,轻烃参数在塔里木原油分类中的应用。地球化学,28(1):26-33。
    91.朱扬明,2000,油气生成温度计算及其在勘探中的应用。石油实验地质,22(2):167-171。
    92. Abdalla Y. Mohamed, Michael J. Pearson, 1999, Modeling Petroleum Generation in the Southern Muglad Rift Basin, Sudan, AAPC, V. 83, P(1943—1964).
    93. Abdalla Y. Mohamed, Michael J. Pearson, William A. Ashcroft, A. Jwhiteman, 2002, Petroleum maturation modelling, Abu Gabra-Sharaf area, Muglad Basin, Sudan, Journal of American Earth Sciences 35, 331-344.
    94. Chevron Oil Field Research Company, 1985, Reservoir Continuity Study, Yabus G, H, J, D&E Sands, Adar Area, Sudan.
    95. C. K. Morley, R. A. Nelson, etc., 1990, Transfer Zones in the East African Rift System and Their Relevance to Hydrocarbon Exploration in Rifts, AAPG, 74 (8): 1234-1253.
    96. Daniel J. Tearpock, Richard E. Bischke & Joseph L. Brewton, 1994, Quick Look techniques for Prospect Evaluation.
    97. Edward A. Beaumont & Norman H. Foster, 2000, Exploring for Oil and Gas Trap.
    98. ERC energy Resource Consultants LTD, Robertson Research International, Scott Pickford & Associates LTD, 1985, An appraisal of the Adar-Yale Structure.
    99. G. J. Genik, 1992, Regional framework, structural and petroleum aspects of rift basins in Niger, Chad and the Central African Republic, Tectonophysics, 213 (169-185).
    100. G. J. Genik, 1993, Petroleum Geology of Cretaceous-Tertiary Rift Basins in Niger, Chad, and Central African Republic, AAPG, V. 77, P (1405—1434).
    101. Guan, Ying-chun, 2001, Impact of dynamic mud invasion on Sw estimation in fresh water formations, Sudan Blocks 1/2/4, Muglad Basin: The Log Analyst, 40(3): 205~221.
    102. Hamada, G. M., Al-Awad, M. N. J., and Almalik, M. S. 2001, Log evaluation of low-resistivity sandstone reservoirs: SPE 70040.
    103. Leslie B. Magoon, Wallace G. Dow, 1994, The Petroleum System—from Source to Trap, P121-140, P189-200, P211-218.
    104. Mango F D. , 1990, The origin of light hydrocarbon in petroleum: A kinetic test of the steady state catalytic hypothesis. Geochim Cosmochim Acta, 54: 1315-1323.
    105. Marcio Rocha Mello and Barry J. Katz. 1997, Petroleum Systems of South Atlantic Margins. AAPG Memoir 73.
    106. Mar jrie Wilson and Rene Guiraud, 1992, Magmatism and rifting in Western and Central Africa, from Late Jurassic to Recent times, Tectonophysics, 213, 203-225.
    107. Milton B. Dobrin & Carl H. Savit, 1992, Geophysical Prospecting (Fourth Edition).
    108. Peter J. Ortoleva, 1994, Basin Compartments and Seals, P39-52.
    109. Peter R. Rose, 1987, Dealing with risk and uncertainty in exploration: How can we improve? AAPG, V71, No. 1, P1-16.
    110. Peter R. Rose, 2001, Risk Analysis and Management of Petroleum Exploration Ventures, AAPG, P17-48.
    111. P. M. Bermingham, J. D. Fairhead and G. W. Stuart, 1983, Gravity study of the Central African rift System: A model of continental disruption, 2. The Darfur domal uplift and associated Cainozoic volcanism. Tectonophysics, 94 (205-222) .
    112. R. B. Elder, V. Attanucci, P. A. Clark, B. S. Carr, B. A. Gale, 1984, Adar-Yale Reservoir Analysis Study, Melut Block, Sudan.
    113. Rene Guiraud and Jean-Christophe Maurin, 1992, Early Cretaceous rifts of West and Central Africa: an overview , Tectonophysics, 213(1992)153-168.
    114. R.Guiraud, R.M. Binks, J.D.Fairhead and M. Wilson, 1992, Chronology and geodynamic setting of Cretaceous-Cenozoic Rifting in West and Central Africa, Tectonophysics, 213(227-234).
    115. R. M. Binks and J. D. Fairhead, 1992, A plate tectonic setting for Mesozoic rifts of West and Central Africa, Tectonophysics, 213 (141-151) .
    116. Roberson Co., 1985, The geology and petroleum potential of southern, central and eastern Sudan.
    117. Robertson , 1985, Research International, The Geology and Petroleum Potential of Southern, Central and Eastern Sudan, Vol.3.
    118. S. E. Browne and J. D. Fairhead, 1983, Gravity study of the Central Africa rift System: A medel of continental disruption, 1. The Ngaoundere and Abu Gabra rifts. Tectonophysics, 94 (187-203) .
    119. T.A.Cross, M. R.Maker, et. al., 1993, Application of High-resolution Sequence Stratigraphy to Reservoir Analysis. Proceedings of the 7th Exploration and Production Research Conference. Paris.Technip. 11-33.
    120. Talbot, M. R., 1988, The origin of lacustrine oil source rocks: evidence from the lakes of tropical Africa. In: Fleet, A.J., Kelts, K. & Talbot, M. R., (eds), Lacustrine Petroleum Source Rocks, Geological Society Special Publication.
    121. Ten Haven H L, 1996, Application and limitation of Mango light hydrocarbon parameters in petroleum correlation studies. Org Geochem, 24:957-976.
    122. Thomas J. Schull, Rift Basins of Interior Sudan: Petroleum Exploration and Discovery. AAPG, 72 (10): 1128-1142.
    123. Tim R. Mchargue , Tom L. Heidrick and Jack E.Livingston , 1992 , Tectonostratigraphic development of the Interior Sudan rifts, Central Africa, Tectonophysics, 213 (187-202) .
    124. U.Achauer, P.K.H.Maguire, J.Mechie, W.V.Green and the KRISP Working Group, 1992, Some remarks on the structure and geodynamics of the Kenya Rift, Tectonophysics, 213 (257-268) .
    125. U.S. Geological Survey World Petroleum Assessment 2000-Description and Results, U.S. Geological Survey World Energy Assessment Team.
    126. Wang Chiyuen et al. , 1995, Some Problems in Understanding Basin Evolution, 地学前沿, Vol.2, No. 3 —4.
    
    127. William Bosworth, 1992, Mesozoic and early Tertiary rift tectonics in East Africa, Tectonophysics, 209 (115-137) .
    128. Xiao Kunye et al., 2002, Regional structural mapping of Melut basin, Block3/7, Sudan, P22-30.
    129. Yang Ming-hui, Liu Chi-yang, Zhao Hong-ge, Zheng Da-hai, 2001, Sedimentary fills and hydrocarbon potential of rift basin: a case study from the Muglad basin, Sudan, Journal of Northwest University, 31 (2) . R. Guiraud, R. M. Binks, J. D. Fairhead and M. Wilson, 1992, Chronology and geodynamic setting of Cretaceous-Cenozoic Rifting in West and Central Africa, Tectonophysics, 213(227-234).

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