GeologicalScienceandTechnologyInformation Vol.36 No.3 May 2017 doi: /j.cnki.dzkq ,,. [J].,2017,36(3): , 1 1, 2 (1.

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1 GeologicalScienceandTechnologyInformation Vol.36 No.3 May 2017 doi: /j.cnki.dzkq [J] (3): (1. ( ) ; ) : 2 ; 3 : ; ; ; ; :P :A : (2017) [21-23] [1-2] [3-4] [5-6] : [7-8] [9-11] 10km 2 Philippi [12] 56% ;Scholz [13] 70% ;Sibson [14] [24] ;Hopper [15] ; Cartwright [16] 1 [ ] : : (2016ZX ) : (1986 ) huzhw@cnooc.com.cn

2 3 : 39 NW km 2 - NWW NWW - (Ar-Pt 1 ) - EW NE-NNE (Pt 2-3 ) [1-225] ( 1) Ar. ;Pt ; -O ;C2-P. - ;T ;T3. ;J ;J3-K1. - ;K2. ;Ek. ;Es. ;Ed. ;Q+N. + 1 Fig.1 GeneralgeologyofBohaiSea NE-NNE EW NW :1 2 (Y ) ( P ) NNE-SSW ;2 NW-SE (R ) ;3 NE-SW (T) ( 2) NWW- EW NNE NNE-SSW NE-SW EW NW-SE 4 ( 2)

3 [26-28] Fig.2 Faultdistributionand Riedeltheoryforshear faultsofbohaisea 1% ~ 10% [29-31] 6 ( 3) ; ; [11] 3 ( - 4) 3 4 ( ) [732] Fig.3 StyleoffaultstructureinBohaiSea Fig.4 Shapeoffaultsurfaceanditsmigrationtype

4 3 : A Y 146 ; m 1.0 m ( 4) ( 5) 5 Qp. ;N2m. ;N1g. 26-A Fig.5 StructuralconfigurationofboundaryfaultofBozhong26-A Oilfield H L H/L 1 H/L H/L m 2 [32] 30.7 m ( 6) 3.3 ( 3)

5 地质科技情报４２２０１７年图６垦利１０４油田断裂样式及其结构段划分类型Ｆｉｇ６ＦａｕｌｔｓｔｒｕｃｔｕｒｅａｎｄｉｔｓｔｙｐｅｏｆｔｅｘｔｕｒｅｄｉｖｉｄｉｏｎｏｆＫＬ１０４Ｏｉｌｆｉｅｌｄ程中多表现为多条断裂与不整合面或连通骨架砂体成藏从而控制油气纵向成藏层系和平面分布范围组成立体式油气输导网络油气输导体系中以断裂作用最为重要垂向上断裂作为有效桥梁沟通烃根据不同断裂组合关系下油气垂向输导与侧向分流源岩区油气与不同层系连通砂体和不整合面平面上型垂向输导型和逐级截流型３种类型４１侧向分流型渤中２５１油田渤中２５１南油多条断裂组合背景下油气运移路径复杂化使油气运移的方向发生改变或油气运移过程中发生侧向分流根据断裂结构中主干断裂和次级断裂的组合特征及其差异输导油气的能力将断裂分为油源断裂截流断裂和分流断裂３种类型油源断裂是指断至特征渤海海域典型油气成藏类型划分为侧向分流田渤中２５１油田和渤中２５１南油田同属渤中２５１构造分别位于该构造边界断层上升盘和下降盘图７渤中２５１油田为被断裂复杂化的背斜构有效烃源岩区沟通成熟烃源岩并使油气向烃源岩造油气藏主要含油层段为沙二段和沙三段的扇三外运移的断裂渤海海域这类断裂往往为在印支期角洲和辫状河三角洲渤中２５１南油田为岩性油气ＮＷＷ近ＥＷ向和燕山期ＮＮＥ向基底断裂格局上继承性发育的新生代控凹边界断裂截流断裂是藏及岩性构造油气藏主要含油层段为明下段河指虽未直接与有效烃源岩区接触但多断至深部古近流极浅水三角洲两大油田探明石油地质储量超２亿ｍ３为渤海油田的主力生产油田之一为断裂系与油源断裂发育演化过程相似在油气二次运移差异控藏作用下的复式成藏油气区在渤海海域极早期即对油气具有截流作用的断裂此类断裂多为具代表性新生代以在喜山期形成的与油源断裂相伴生的ＮＥ向或近ＥＷ向持续活动的控带断裂分流断裂多断裂差异输导模式导致油气分别在深浅层聚集成藏该油田断裂输导类型为侧向分流型图７为新近系构造运动期形成的浅层次生张扭性断层多条油源断裂直接与烃源岩区接触油气二次运移与主干油源断裂搭接并连通油气进一步向浅层运初期即开始多路径侧向分流油气一部分油气通过移对油气向浅层进行重新调整和分配成藏４典型实例分析及成藏模式由于断裂在油气运移过程中垂向输导和侧向分流作用造成不同断裂结构组合下油气差异输导模式最终导致油气在不同成藏层位和构造部位聚集早期边界断层及派生断层向陡坡带运移在沙河街组背斜圈闭中聚集成藏属于自生自储型油藏另一部分油气继续向浅层分流通过次级断裂和油源断裂搭接将油气进一步输送至浅层明化镇组属它源断控以垂向运移为主的成藏模式整体呈现双向供油深浅分流差异富集的成藏特征

6 第３期胡志伟等渤海海域断裂对油气优势运移通道的影响及其控藏类型４３图７渤中２５１和渤中２５１南油田油气运聚类型侧向分流型Ｆｉｇ７Ｐｅｔｒｏｌｅｕｍｍｉｇｒａｔｉｏｎａｎｄａｃｃｕｍｕｌａｔｉｏｎｔｙｐｅｏｆｂｚ２５１ａｎｄＢＺ２５１Ｓｏｉｌｆｉｅｌｄｓｌａｔｅｒａｌｄｉｓｔｒｉｂｕｔａｔｉｏｎ４２垂向输导型蓬莱１５２油田蓬莱１５２油田主要含油层位为明下段和馆陶作为主要油源断裂沟通深层油气伴生的截流断裂与主干油源断裂在深部古近系的竖滑段搭接或组位于庙西北洼陡坡带属于典型受控于边界断裂并列这种组合极大增强了油气垂向运移能力油的断块油气藏边界主控断层及其派生断层极为发源断裂与截流断裂联合作用下高效输导油气向浅层育变形复杂构造样式多样断裂油气输导模式及运移成藏呈现主断供油深层截流浅层富集特征图８蓬莱１５２油田作为渤海海域近年来在边封堵能力联合控制着高丰度油藏的分布剖面上断裂组合样式可分为坡坪式马尾式及阶梯缘小凹陷发现的亿吨级大油田多口探井揭示油层式等多种类型此类断裂样式基本涵盖了渤海海域厚度超百米整体上油藏厚度大测试产能高储量绝大部分复杂断裂类型丰度大这与其断裂主控作用下高效的垂向输导型该油田断裂输导类型为垂向输导型控边断裂运聚模式密不可分图８蓬莱１５２油田油气运聚类型垂向输导型Ｆｉｇ８Ｐｅｔｒｏｌｅｕｍｍｉｇｒａｔｉｏｎａｎｄａｃｃｕｍｕｌａｔｉｏｎｔｙｐｅｏｆｐｌ１５２Ｏｉｌｆｉｅｌｄｖｅｒｔｉｃａｌｍｉｇｒａｔｉｏｎ４３逐级截流型渤中２６３油田渤中２６３油田位于渤南低凸起西段边界大断位于花心内瓣的ＢＺ２６３４井获得６８８ｍ厚的油气控制形成的断块圈闭群油气主要分布于明下段层位于花心外瓣的ＢＺ２６３１井获得４２ｍ厚的油气层ＢＺ２６３６井则只获得２８４ｍ厚的油气层远离油源断裂的ＢＺ２６３８井则只获得１９１ｍ厚的含剖面上断裂样式主要为依附于边界断裂发育的复油水层层下降盘为受边界断裂及其派生的次级断裂联合杂Ｙ字构造或似花状构造勘探实践结果表明该油田断裂输导类型为逐级截流型边界断裂

7 ( 9) ( ) Fig.9 Petroleum migrationandaccumulationtypeofbz26-3oilfield(stepclosure) 5 (1) NWW- EW [2] NNE [M]. : 2012:1-36. [3] [J]. (3): [4] [J] (4): pliedgeophysics (3/4): (2) um Geology200017: [7] : (3) [9] [J] (1): : [1]. [M]. : 2009: : [5] BruhnRLParry W TYonkee W Aetal.Fracturingandhy- drothermalalterationinnormalfaultzones[j].pureand Ap- [6] HesthammerJJohansenT ESWatsL.Spatialrelationships withinfaultdamagezonesinsandstone[j].marineandpetrole-. [M]. : [8] Kim YSPeacockD CPSandersonDJ.Faultdamagezones [J].JournalofStructuralGeology200426(3): [10]. [M]. : 2000: [11]. (4) ence : SocietyofLondon : [J] (2): [12]PhilippiG T.Onthedepthtimeandmechanismofpetroleum generation[j].geochimicaetcosmochimica Acta196529: [13]ScholzC H.Earthquakeprediction:A physicalbasis[j].sci- [14]SibsonR HMoorcJMcFankinA H.Seismicpumping:Ahy- drothermalfluidtransportmechanism[j].journalofgeological [15] HooperE.Fluid migrationalonggrowthfaultincompacting

8 3 : 45 sediments[j].journalofpetroleum Geology199114(2): pressuredshalesequencesinthenorthseabasin[j].geology :447. [17]. [M]. 2. : [27]FowlesJBurleySD.Texturalandpermeabilitycharacteristic 1994:1-32. offaultedhighporositysandstones[j].marinepetroleumand [18]. [M]. : Geology199411: :4-30. [20]. tration:athree-dimensionalmodel[j].aapg Buletin1997 [J] (6): (9): [M]. : 1998: [24]. [J]. : (4): [25]. [J] (4): [16]CartwrightJA.Episodicbasin-widefluidexpulsionfrom geo- [21]. [M]. : 1984:1- [30]PangXiongqiJinZhijunJiangZhenxue.Quantitativemodelsof 208. hydrocarbonaccumulation[m ].Beijing:Petroleum Industry [22]. [M]. : Press2003: :1-65. [31]LiMingcheng.Basicprinciplesof migrationandhydrocarbon [23]. exploration[j].earthscience200429(4): [26] Gudmundsson ABergSLyslo K B.Fracturenetworksand fluidtransportinactivefaultzone[j].journalofstructurege- ology200123: [28]. [32]. [J] (4): InfluencesofFaultsonthePetroleum DominantMigrationPathway anditscontrolingreservoirtypesinthebohaiarea HuZhiwei 1 XuChanggui 1 YangBo 1 Deng Hui 2 (1.TianjinBranchofCNOOCLtd.Tianjin300452China; 2.EngineeringTechnologyBranchofCNOOCEnergyDevelopmentCo.Ltd.Tianjin300452China) [19]. : [J] (10): [M]. : 1998:6-33. [29]HindleA D.Petroleum migrationpathwaysandchargeconcen- Abstract:Faultingworksthroughhydrocarbonmigrationprocessandhasdiferentialcontrolonaccumula- tioninbohairiftbasinbutdominantmigrationpathwaycontrolstheformationofhydrocarbonenrich- mentzone.thisstudybasedonthedrilingand3dseismicinterpretationincombinationwiththebasin- formationmechanismandexplorationpracticeanalyzescomprehensivelytheprimaryreasonforthefor- mationofthefaultdominantmigrationpathwayaccordingtothefaulttextureandoriginmechanism.the resultsshowthatthefaultsurfaceshapedeterminesthemacrotrendsofhydrocarbonmigrationandaccu- mulationwhilethefaulttextureafectstheeficiencyofhydrocarbonmigrationandthefaultassemblages controlthedirectionofhydrocarbonpartialflow.thesethreecouplingfactorsofpotentialfieldandefi- ciencyandpartialflowaretheinnerreasonsoffaultdominantmigratinghydrocarbons.withatypicaloil- fieldasanexamplethispaperintroducestheverticalmigrationandlateralpartialflowunderthediferent faultassemblages.thehydrocarbonaccumulationpaternsafectedbydiferentmigrationincludevertical migrationandlateralpartialflowandstepclosure.theanalysisresultsthatthefaultsurfacedetermines themacrotrendsthefaulttextureafectsmigrationeficiencyandthefaultassemblagescontrolmigration directionaretheefectiveapproachforsearchinghydrocarbonenrichmentfaultblockinbohaisea. Keywords:dominanthydrocarbonmigration;originanalysis;verticalmigration;lateralpartialflow;Bohai Sea

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