冀中坳陷隐蔽型潜山油藏类型与成藏模拟.pdf

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1、石油勘探与开发2012年4月PETR0LEUMEXPLORATIONANDDEVELoPMENTV_01．39No．2137文章编号：1000-0747(2012)02．013707冀中坳陷隐蔽型潜山油藏类型与成藏模拟赵贤正，金凤鸣，崔周旗，韩春元，曾溅辉2，王权，郭凯2(1．中国石油华北油田公司；2．中国石油大学(北京))基金项目：国家科技重大专项(2011ZX05006．005)；中国石油天然气股份有限公司科技项目(2011D0703)摘要：基于近年来冀中坳陷隐蔽型潜山油藏勘探进展，分析隐蔽型潜山油藏的类型和成藏特点，并通过油气运聚模拟实验剖析隐蔽型潜山油藏的油气运聚

2、机制。潜山油藏可分为容易发现的潜山顶(头)聚油的常规型潜山油藏和不易发现的潜山坡及潜山内幕聚油的隐蔽型潜山油藏。有效隔(盖)层的存在是潜山内幕油藏形成的重要条件，控山断层是其最主要的油气运移通道；潜山坡油藏圈闭的形成需2个遮盖条件，即顶部由不整面之上的泥质盖层遮挡，侧面由潜山内幕隔层形成封堵，不整合面是其主要油气运移通道。二维油气运聚模拟实验表明，输导通道(断层或不整合面)与潜山储集层渗透率的比值及充注动力决定潜山油气的优先充注部位，当断层或不整合面为高效输导层时，油气优先充注潜山顶部，形成潜山顶(头)油藏；当断层或不整合面的渗透性变差或其本身具非均质性，而潜山内幕或潜山

3、坡又存在高渗透性储集层时，则油气优先向潜山内幕或潜山坡充注，形成潜山内幕或潜山坡油藏。图7表2参20关键词：冀中坳陷；隐蔽型潜山油藏；聚油机理；成藏模拟中图分类号：TEl22．1文献标识码：ATypesofsubtleburied．hilloilreservoirsandtheiraccumulationsimulationinJizhongDepression，BohaiBayBasinZhaoXianzheng，JinFengming，CuiZhouqi，HanChunyuan，ZengJianhui，WangQuan，GuoKai(1．PetroChinaHuabe

4、iOilfieldCompany，Renqiu062552，China；2．ChinaUniversityofPetroleum，Beijing102249，China)Abstract：Thetypesofsubtleburied-hillresevoirsandtheiraccumulationcharacteristicsareanalyzedbasedontheexplorationprogressionofsubtleburied-hillreservoirsintheJizhongDepressioninrecentyears．Thesereservoirsa

5、reclassifiedintoeasilydiscoveredburied-hillheadreservoirs．anddifficultlydiscoveredburied-hillslopereservoirsandburied-hillinternalreservoirs．Effectivesealisthekeyfactorfortheformationofbuffed-hillinternalreservoirs，andmountaincontrollingfaultsaretheimportanthydrocarbonmigrationpathways．As

6、forbuffed—hillslopereservoirs，twosealingconditionsmustbesatisfied，includingtheargillaceouscaprocksatthetopoftheunconformitiesandtheburied-hillinternalbarriersattheflank，andtheunconformitiesactastheprimarymigrationpathways．Simulationexperimentsonpetroleummigrationandaccumulationbya2Dexperi

7、mentalmodelshowthatthepreferentialcharginglocationofhydrocarbonisdeterminedbythechargingforceandthepermeabilityratiooftransportpathways(faultsorunconformities)tobuffed-hillreservoirs．Whenfaultsorunconformitiesarehigh-efficiemtransportpathways，hydrocarbonwillchargeth