鄂尔多斯盆地定边县姬塬油区延9和长2油层组油藏特征研究
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摘要
鄂尔多斯盆地是一个多旋回叠合型盆地,油气资源非常丰富,油气勘探与开发的潜力很大。姬塬油田是鄂尔多斯盆地陕北定边地区的一个主要产油区,延安组延9和延长组长2油层组为研究区的两个主要含油层系,为了进一步地研究该区油气聚集的规律,有必要对延9及长2油层组油藏特征做细致的研究。
     本文以沉积学、石油地质学和测井学理论为指导,在收集大量地质、钻井、测井、试油等资料的基础上,将地质、地球物理、地球化学方法相结合,野外地质调查与室内地质研究相结合,采用多种测试方法及分析手段,对姬塬油区延9与长2油层组地层、构造、沉积、储层及油藏特征进行了深入研究,在此基础上总结了油气富集规律及控制因素。
     姬塬油区构造总体上为西倾单斜的构造背景上发育鼻隆构造。延9、长2沉积微相类型划分为河道砂坝、决口扇、天然堤、洪泛平原、分流河道、河间洼地等。延安组延9属河流相沉积环境,发育了北东向、近南北向河道砂体;延长组长2属于三角洲平原分流河道沉积,发育了北东向、北北东向、北北西向和近南北向展布的分流河道砂体。
     综合岩心分析数据和测井解释结果表明延9储层主要为一套中孔—低渗储层,个别低孔一特低渗,以Ⅱ类储层为主。长2储层物性较差,主要是特低孔—特低渗、低孔—特低渗和中孔—特低渗储层,个别中孔—低渗,以Ⅲ类储层为主,个别是Ⅱ类储层。
     研究区储层物性的好坏主要受沉积微相的控制。河道和分流河道水动力强,颗粒较粗,分选好,胶结物少,储层物性较好。其砂体的主体部位具有较高的孔隙度和渗透率,是油气聚集的有利地带,而向其边缘地带水动力减弱,颗粒变细,孔隙度和渗透率相应变小。河道间及分流河道间以粉砂质泥岩和泥岩为主,是油气聚集良好的侧向遮挡,一般不发育油层。同时成岩作用对储层物性的影响既有破坏性,也有建设性。破坏性作用主要是早期的机械压实、压溶与胶结充填作用;建设性的成岩作用主要是埋藏环境下成岩晚期的溶蚀作用,产生了大量的溶蚀孔,改善了储集条件。
     姬塬油区油气成藏条件研究表明长7烃源岩为主力生油岩,延长组主要以渗透性砂体作为油气运移通道,油藏主要分布在生烃中心及周边地区;三叠系顶部不整合面和侏罗系古河道砂体共同构成了延安组油气的主要运移通道,其油气主要分布在侏罗系古河道内及其不整合面附近。延安组延9油藏主要受前侏罗纪古地貌控制,圈闭条件主要是压实构造和岩性遮挡,河流相砂体是油气储集空间;延长组长2油层组由于差异压实作用易形成压实构造,在砂体发育带形成鼻状隆起和局部隆起构造,上倾方向若配上岩性遮挡,可形成构造—岩性油藏,分流河道相是油气富集有利区。
Ordos Basin is a polycyclic superposition basin which possesses abundant oil & gas resources and has bright prospects in oil & gas exploration. Jiyuan oilfield is one important generative area of oil of Dingbian area in Ordos basin. Yanan formation's Yan9 and Yanchang formation's Chang2 oil beds are two primary oil beds in it .For the sake of deeply researching and the rules of hydrocarbon accumulation and distribution, it is necessary to study characteristic of oil storage in the Yan9 and Chang2 oil beds.
     The theories of sedimentology and petroleum geology and borehole geophysics as direction, on the basis of collecting the data of geology, drilling, logging, oil testing, combining with geology, geophysics, geochemistry, combining with geology investigations in the field and research indoors, using many testing methods and analytical techniques, Yan9 and Chang2 oil beds of Jiyuan oilfield were deeply studied in strata, structure、sediment、reservoir characteristics and characteristic of oil storage.On the basis of these methods, the paper researched the rules of accumulation and the distribution of oil and gas and controlling factors of it.
     West monocline as background, nosing structures were developed in Jiyuan oil field. Sedimentary microfacies of Yan9 and Chang2 oil beds were river channel sand bar、crevasse splay、natural levee、flood plain, distributary channel, low-lying land between river channel and so on. Yan9 reservoir developed meandering river sediment and sand bodies' configuration presented a band shape of north-east and nearly south-north trend. Chang2 reservoir developed distributary channel deposit of delta plain and sand bodies' configuration presented a band shape of north-east, north-north- east, north- north- west and nearly south-north trend.
     The paper synthesized a lot of the data of core analysis and result of log interpretation . Yan9 reservoir was moderate porosity-low permeability in the majority, low porosity-ultra low permeability individually. The kind of Yan9 reservoir was II type . Chang2 was worse than Yan9 in physical property of reservoir, Main porosity and permeability types of which were ultra low porosity-ultra low permeability, low porosity-ultra low permeability, moderate porosity- ultra low permeability .some was moderate porosity-low permeability. The reservoir types were mainly as III type, some was II type of Chang2.
     The physical property of reservoir was determined by sedimentary microfacies in researching field. Because the hydrodynamic pressure of Fluvial channel and distributary channel were very strong and the size of grain was large, well gradation, as well as less cementing material, the physical property was well. The main part of sand body which was vantage ground for the hydrocarbon accumulation often had higher porosity and permeability. But the characteristic of the boundary of sand body was opposite to it. The lithology of interchannel and interdistributary area were mainly silty mudstone and mudstone, it was the good lateral barrier and oil usually didn't accumulate in there. The diagenesis had both constructive and destructive effect to the physical property of reservoir.. The destructive effect was mechanical compaction or pressolution and cemented fill in the early period. The constructive effect was denudation in late diagenesis in the environment of burial and developed a lot of emposieu which improved the physical property of reservoir.
     The researching of the condition of oil accumulation indicated Chang7 was the main oil source rock in the Jiyuan oilfield. Permeable sandstone was the main petroleum migration pathway of Yangchang Formation, and oil reservoir distributed chiefly at hydrocarbon generation center or regions around it. Surface of Triassic unconform ity and ancient stream channel sandbody of Jurassic constituted the major migration pathway of Yanan Formation, the oil reservoir accumulated primarily in the ancient stream channel and places near the surface of unconform ity.Yan9 oil reservoir was dominated by Jurassic palaeogeomorphology. The traps were mainly compacted structure and stratigraphy barrier. Fluvial facies accumulated oil.Chang2 oil reservoir usually developed compacted structure because of differential compaction and had nosing structure and arched structure in well developeing sand body, where would developed structural-lithologic reservoir if having stratigraphy barrier in the updip direction. Distributary channel facies was in favor of accumulating oil.
引文
1、武富礼、李文厚、李玉宏、席胜利,鄂尔多斯盆地上三叠统延长组三角洲沉积及演化,古地理学报,2004.8,6(3),P307—P315
    2、付金华、罗安湘、喻建等,西峰油田成藏地质特征及勘探方向,石油学报,2004.3,25(2),P25—P29
    3、付金华、郭正权等,鄂尔多斯盆地西南地区上三叠统延长组沉积相及石油地质意义,古地理学报,2005.2,7(1),P34—P44
    4、王琪、史基安等,鄂尔多斯盆地盐池—姬塬地区三叠系长2砂岩成岩演化特征与优质储层分布,矿物岩石,2005.12,25(4),P98—P105
    5、杨友运等,印支期秦岭造山活动对鄂尔多斯盆地延长组沉积特征的影响,煤田地质与勘探,2004.5,32(5),P7—P9
    6、赵俊兴、陈洪德,鄂尔多斯盆地侏罗纪早中期甘陕古河的演化变迁,石油天然气地质,2006.4,27(2),P152—P158
    7、赵俊兴、陈洪德、张锦泉,鄂尔多斯盆地下侏罗统富县组沉积体系及古地理,岩相古地理,1999.10,19(5),P40—P46
    8、魏斌、魏红红、陈全红、赵虹,鄂尔多斯盆地上三叠统延长组物源分析,西北大学学报(自然科学版),2003.8,33(4),P447—P450
    9、聂永生、田景春、夏青松等,鄂尔多斯盆地白豹—姬塬地区上三叠统延长组物源分析,油气地质与采收率,2004.10,11(5),P4—P7
    10、彭寿昌、何幼斌,湖成三角洲平原与前缘的鉴别—以姬塬地区长2油组为例,内蒙古石油化工,2005,12期,P100—P102
    11、孙宜显、李维锋、王宏伟,鄂尔多斯盆地姬塬地区长2油层组曲流河三角洲沉积,河南石油,2006.3,20(2),P7—P9
    12、王峰、王多云、高明书等,陕甘宁盆地姬塬地区三叠系延长组三角洲前缘的微相组合及特征,沉积学报,2005.6,23(2),P218—P224
    13、王桂成、马维民等,鄂尔多斯盆地富县探区三叠系延长组沉积特征,西北大学学报(自然科学版),2003.10,33(5),P608—P612
    14、杨华、窦伟坦等,鄂尔多斯盆地低渗透油藏勘探新技术,中国石油勘探,2003.3,8(1),P32—P40
    15、麻平社、张旭波、韩艳华,姬塬—白豹地区低电阻率油层成因及解释方法,测井技术,2006.2,30(1),P84—P87
    16、谢忠、方林林等,利用测井新技术精细描述和评价复杂砂岩储层,国外测井技术,2004.6,19(3),P8—P10
    17、席胜利、刘新社、王涛,鄂尔多斯盆地中生界石油运移特征分析,石油实验地质,2004.6,26(3),P229—P235
    18、赵文智、胡素云、汪泽成等,鄂尔多斯盆地基底断裂在上三叠统延长组石油聚集中的控制作用,石油勘探与开发,2003.10,30(5),P1—P5
    19、李德生,重新认识鄂尔多斯盆地油气地质学,石油勘探与开发,2004.12,31(6),P1—P7
    20、宋凯、吕剑文等,鄂尔多斯盆地定边—吴旗地区前侏罗纪古地貌与油藏,古地理学报,2003.11,5(4),P497—P507
    21、周瑞、胡学智,鄂尔多斯盆地西北部灵盐定地区油藏类型及其控制因素,石油实验地质,2001.12,23(4),P390—P394
    22、王建民,鄂尔多斯盆地南部中生界大中型油田形成条件与勘探策略,石油勘探与开发,2006.4,33(2),P145—P149
    23、X. M. Xiao、B. Q. Zhao、Z. L. Thu, Z. G. Song、R. W. T. Wilkins, "Upper Paleozoic petroleum system, Ordos Basin, China", Marine and Petroleum Geology, 2005.4
    24、杨晓萍、裘怿楠,鄂尔多斯地上三叠统延长组浊沸石的形成机理、分布规律与油气关系,沉积学报,2002.12,20(4),P628—P632
    25、时志强、韩永林、赵俊兴.鄂尔多斯盆地早侏罗世富县期冲积扇沉积,成都理工学院学报,2002.8,29(4),P390—P393
    26、王琪、史基安、王多云等,鄂尔多斯盆地西部三叠系长2油层组砂岩成岩演化特征,天然气地球科学,2005.6,16(3),P261—P268
    27、高润峰,陕北张天渠油田延长组储层划分与注水开发研究,山西科技,2005,4期P86—P87
    28、姚泾利等,鄂尔多斯盆地南部延长组沉积特征与物源探讨,西安石油学院学报(自然科学版),2000.9,15(5),P7—P9
    29、王宝清、蒋继辉等,鄂尔多斯盆地白于山地区三叠系延长组长4+5储层特征,西安石油大学学报(自然科学版),2005.3,20(2),P1—P5
    30、赵长永、张春生、张兵,油坊庄地区上三叠统长21沉积微相研究,内蒙古石油化工,2005,11期,P64—P65
    31、郑浚茂、庞明,碎屑储集岩的成岩作用研究[M],北京:中国地质大学出版社,1988,P25—P98
    32、黄思静、武文慧等,大气水在碎屑岩次生孔隙形成中的作用—以鄂尔多斯盆地三叠统延长组为例,地球科学—中国地质大学学报,2003.7,28(4),P419—P424
    33、朱世全、黄思静、姚鹏等,姬塬地区上三叠统长2油层组高岭石胶结与储层评价,沉积与特提斯地质,2006.3,26(1),P88—P91
    34、窦伟坦,鄂尔多斯盆地城华地区长3~3油组油气富集的控制因素,西安石油学院学报,1999.9,14(5).P1—P4
    35、Jinxing Dai、Jian Li、Xia Luo, Wenzheng Zhang、Guoyi Hu、Chenghua Ma、Jianmin Guo、 Shouguo Ge, "Stable carbon isotope compositions and source rock geochemistry of the giant gas accumulations in theOrdos Basin, China", Organic Geochemistry, 36 (2005) 1617-1635
    36、邓军、王庆飞等,鄂尔多斯盆地演化与多种能源矿产分布,现代地质,2005.12,19(4),P538—P545
    37、杨华、张文正,论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用:地质地球化学特征,地球化学,2005.3,34(2),P147—P154
    38、张润合、郑兴平等,鄂尔多斯盆地上三叠统延长组四、五段泥岩生烃潜力评价,西安石油学院学报(自然科学版),2003.3,18(2),P9—P13
    39、许明旺、李伟、曹开松等,鄂尔多斯盆地富县地区油气成藏规律研究,西部探矿工程(增刊),2005.6,111期,P81—P82
    40、游瑜春、傅强,吴旗地区上三叠统长2组沉积相研究,同济大学学报,2003.8,31(8),P906—P910
    41、陈荷立,油气运移研究的有效途径,石油与天然气地质,1995.6,16(2),P126—P130
    42、席胜利、刘新社,鄂尔多斯盆地中生界石油二次运移通道研究,西北大学学报(自然科学版),2005.10,35(5),P628—P632
    43、喻建、宋江海等,鄂尔多斯盆地中生界隐蔽性油气藏成藏规律,天然气工业,2004.12,24(12),P35—P37
    44、秦红、王多云等,鄂尔多斯盆地镇北地区三叠系延长组长3油层组储油砂体成因及成藏特征研究,天然气地球科学,2006.6,17(3),P391—P396
    45、赵靖舟、蒙晓灵、杨县超,鄂尔多斯盆地北部姚店油田南区长6段沉积相特征及其控油规律,石油勘探与开发,2006.2,33(1),P49—P52
    46、唐民安、孙宝岭,鄂尔多斯盆地泾川地区中生界油气富集受控因素及勘探方向,河南石油,2000,4期,P4—P6
    47、赵志东,鄂尔多斯盆地中生界低孔低渗储层地球化学评价方法,特种油气藏.2004.10,11(5),P22—P24
    48、吴朝东,延安地区延安组沉积岩类型及储集性能,岩石学报,1996.11,12(4),P606—P618
    49、解艳岭、庄军,鄂尔多斯盆地南部延安组砂体粒度特征,西安矿业大学学报,1998.12,27(4),P428—P432
    50、王新民、郭彦如、付金华等,鄂尔多斯盆地延长组长8段相对高孔渗砂岩储集层的控制因素分析,石油勘探与开发,2005.4,32(2),P35—P38
    51、张承泽、原海涛、杨琴,富县地区延长组6段沉积特征研究,重庆石油高等专科学校学报,2004,6卷,P8—P10
    52、刘化清、廖建波等,鄂尔多斯盆地环县地区长6沉积体系展布特征,沉积学报,2005.12,23(4),P584—P588
    53、马素萍、漆亚玲等,西峰油田延长组烃源岩生烃潜力评价,石油勘探与开发,2005.6,32(3),P51—P54
    54、宋凯、吕剑文、杜金良等,鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系,古地理学报,2002.8,4(3),P59—P65
    55、孙长青、赵克斌等,鄂尔多斯盆地中部油气聚集区带地球化学特征研究,2003.11,39(6),P46—P48
    56、刘勇、金晓辉等,鄂尔多斯盆地延长组油气初次运移特征,西安石油学院学报,1997.1,12(1),P8—P11
    57、赵靖舟、武富礼等,陕北斜坡东部三叠系油气富集规律研究,石油学报,2006.9,27(5),P24—P27
    58、温爱琴、范久霄,鄂尔多斯盆地镇—泾地区三叠系烃源岩地化特征及勘探前景,河南石油,2003.3,17(2),P15—P17
    59、王琪、陈国俊等,鄂尔多斯盆地盐池—姬塬地区三叠系长4+5砂岩成岩演化特征与优质储层分布,沉积学报,23(3),P397—P404
    60、李凤杰、王多云、张庆龙等,鄂尔多斯盆地陇东地区延长组沉积相特征与层序地层分析,沉积学报,2006.8,24(4),P549—P554
    61、孙卫、何娟,姬塬延安组储层水驱油效率及影响因素,石油与天然气地质,1999.3,P26—P29
    62、吕小理、王鑫峰、邓君,陕北富县探区延长组砂岩成岩作用及储层特征研究,内蒙古石油化工,2001.5,27卷,P153—P155
    63、王起琮、李文厚、赵虹等,靖边—安塞地区延长组长1段沉积相特征,西北大学学报(自然科学版),2006.2,36(1),P107—P111
    64、黄思静、张萌、朱世全等,砂岩孔隙成因对孔隙度/渗透率关系的控制作用—以鄂尔多斯盆地陇东地区三叠系延长组为例,成都理工大学学报(自然科学版),2004.12,31(6),P648—P653
    65、Lifei Zhang、Min Sun、Shiguang Wang、Xueyuan Yu, "The compjosition of shales from the Ordos basin, China: effects of source weathering and diagenesis", Sedimentary Geology 116 (1998) 129-141
    66、Zhouliang Zhang、Keqin Sun、Jarun Yin, "Sedimentology and sequence stratigraphy of the Shanxi Formation(Lower Permian) in the northwestern Ordos Basin, China:an alternative sequence model for fluvial strata "Sedimentary Geology 112 (1997) 123-136
    67、Fouch, T D、Pithman J K、Wesley J B、Ethridge F G, "Sedimentology, diagenesis, and reservoir character of Paleogene fluvial and lacustrine rock,Uinta intermontane basin, Utah; evidence from the Altamont and Red Wash fields.U.S",Geological Survey Circular, 1990.4
    68、A.D Mail,Facies Architecture in Clastic Sedimentary Basin,In Kleinspeh K.L,Paola C(eds),New Perspectives in Basin Analysis.New York:Springer-Verlag, 1998, P67-P81
    69、J.S. Reed*、K.A. Eriksson, M. Kowalewski,"Climatic, depositional and burial controls on diagenesis of Appalachian Carboniferous sandstones:qualitative and quantitative methods", Sedimentary Geology 176(2005) 225-246
    70、H.RJo*、S.KXhough,"Architectural analysis of fluvial sequences in the northwestern part of Kyongsang Basin(Early Cretaceous),SE Korea"Sedimentary Geology 144(2001)307-334
    71、S. Schmid、R.H. Worden、Q.J. Fisher,"Diagenesis and reservoir quality of the Sherwood Sandstone(Triassic), Corrib Field, Slyne Basin, west of Ireland"Marine and Petroleum Geology 21(2004)299-315
    72、Rodrigo Dias Lima、Luiz Fernando De Ros*,"The role of depositional setting and diagenesis on the reservoir quality of Devonian sandstones from the Solimoes Basin, Brazilian Amazonia"Marine and Petroleum Geology 19(2002) 1047-1071
    73、Attila Ciner、Erdal Kosun、Max Deynoux,"Fluvial, evaporitic and shallow-marine facies architecture, depositional evolution and cyclicity in the Sivas Basin(Lower to Middle Miocene)", Central Turkey Journal of Asian Earth Sciences 21(2002) 147-165
    74、M. Royhan Gani*、M. Mustafa Alam,"Fluvial facies architecture in small-scale river systems in the Upper Dupi Tila Formation, northeast Bengal Basin, Bangladesh" Journal of Asian Earth Sciences 24(2004) 225-236
    75、Makoto Ito、Masaki Matsukawa、Takahiro Saito、Douglas J. Nichols,"Facies architecture and paleohydrology of a synrift succession in the Early Cretaceous Choyr Basin", southeastern Mongolia Cretaceous Research 27(2006) 226—240
    76、Aysegul Yildiz、Ali Gurel,"Palaeontological, diagenetic and facies characteristics of Cretaceous/Paleogene boundary sediments in the Ordu, Yavuzlu and Uzunisa areas", Eastern Pontides, NE Turkey Cretaceous Research 26(2005) 329—341
    77、Eric E.Hiatt、Kurt Kyser、Robert W.Dalrymple,"Relationships among sedimentology, stratigraphy, and diagenesis in the Proterozoic Thelon Basin, Nunavut, Canada: implications for paleoaquifers and sedimentary-hosted mineral deposits"Journal of Geochemical Exploration 80(2003)221-240
    78、YusongYuan、ShengbiaoHu、Hongjun Wang、Fenjing Sun,"Meso-Cenozoic tectonothermal evolution of Ordos basin, central China: Insights from newly acquired vitrinite reflectance data and a revision of existing paleothermal indicator data", Journal of Geodynamics, 2006.7
    79、Chunfang Cai、Guoyi Hu、Hong He、Jian Li、Jianfeng Li、Yasheng Wu,"Geochemical characteristics and origin of natural gas and thermochemical sulphate reduction in Ordovician carbonates in the Ordos Basin, China" Journal of Petroleum Science and Engineering 48(2005) 209-226
    80、Chunfang Cai、Hongtao Li、Mingkuan Qin、Xiaorong Luo、Feiyu Wang、Guangxi Ou,"Biogenic and petroleum-related ore-forming processes in Dongsheng uranium deposit, NW China" Ore Geology Reviews, 2006.4

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