河控三角洲水下分流河道砂体储集层构型精细分析

20134PETROLEUMEXPLORATIONANDDEVELOPMENTVol.40No.2181文章编号：1000-0747(2013)02-0181-07DOI:10.11698/PED.2013.02.06河控三角洲水下分流河道砂体储集层构型精细分析——51赵小庆1,2，鲍志东1,2，刘宗飞1，赵华1,2，柴秋会1,2（1.中国石油大学（北京）地球科学学院；2.中国石油大学（北京）油气资源与探测国家重点实验室）基金项目：国家科技重大专项（2008ZX05030-005-01；2011ZX05004-004-007）摘要：基于“模式拟合、动态验证”的研究思路，结合密井网区10口取心井、257口井测井资料及近10年的生产动态资料，对松辽盆地扶余油田探51区块泉四段扶余油层三角洲前缘水下分流河道储集层进行分析，探究水下分流河道储集层内部构型单元的空间展布特征及识别标志。结果表明：研究区目的层单河道砂体宽度为300～500m，其识别标志分别为：河道间沉积、邻井砂体高程差异、河道砂体厚度差异、相邻砂体的“厚—薄—厚”组合；单河道砂体内部4级构型界面的倾角为0°～2°。明确了水下分流河道储集层中单河道砂体及单河道砂体内部增生体的测井响应特征及识别方法，建立了研究区目的层水下分流河道砂体的三维构型模型，为全区水下分流河道砂体解剖提供了定量、可靠的地质模式。图11表1参25关键词：河控三角洲；扶余油田；储集层构型；水下分流河道砂体；隔层；夹层中图分类号：TE122.1文献标识码：AAnin-depthanalysisofreservoirarchitectureofunderwaterdistributarychannelsandbodiesinariverdominateddelta:AcasestudyofT51Block,FuyuOilfieldZhaoXiaoqing1,2,BaoZhidong1,2,LiuZongfei1,ZhaoHua1,2,ChaiQiuhui1,2(1.CollegeofGeosciences,ChinaUniversityofPetroleum,Beijing102249,China;2.StateKeyLaboratoryofPetroleumResourceandProspecting,ChinaUniversityofPetroleum,Beijing102249,China)Abstract:Guidedbytheconceptof“modelfitting,dynamicvalidation”,andbasedonthedataof10coringwells,257loggingwells,andtheproductionperformanceinthedensespacingareaduringthepasttenyears,theunderwaterdistributarychannelsandreservoirinK1q4ofT51Block,FuyuOilfield,SongliaoBasin,wasanalyzedtoexaminethespatialdistributionandidentificationmarksofthearchitectureswithinthereservoir.Resultsindicatedthatthesinglechannelsandbodyis300–500mwideandcanbeidentifiedbysuchmarksasinter-channelsediments,sandelevationdifferencebetweenwells,differenceofchannelsandthickness,and“thick-thin-thick”sandsassociation;thedipangleofthefourth-orderinterfaceis0°–2°.Besides,theloggingresponsecharacteristicsandidentificationmethodofsinglechannelsandbodiesandtheirinterioraccretedbodiesweredefinedforthereservoir.A3Darchitecturemodelisestablishedfortheunderwaterdistributarychannelreservoirinthestudyarea,providingaquantitativeandreliablegeologicalmodelforanalysisofunderwaterdistributarychannelsandsinthewholearea.Keywords:riverdominateddelta;FuyuOilfield;reservoirarchitecture;underwaterdistributarychannelsand;barrier;interlayer0[1][2][3][4-6]5111182Vol.40No.2图1扶余油田构造位置图[7][8-9]300～500m200m196561990990%[10]22.1水下分流河道砂体构型级次划分Miall[1][11][12]612Miall334456462.2单一河道识别标志及定量规模51413[8-9]2.2.1单一河道的识别标志[13]425①2②20134——51183图2扶余油田东区泉四段不连续河道间砂体作为单一河道砂体分界线模式图3扶余油田东区泉四段两条河道高程差异作为单一河道砂体分界线模式图4扶余油田东区泉四段两条河道厚度差异作为单一河道砂体分界线模式图5扶余油田东区泉四段砂体“厚—薄—厚”特征作为单一河道砂体分界线模式3③184Vol.40No.24④542.2.2单一河道的规模[3]167300～500m330m1186h=2.2426lnW−7.93871图6扶余油田东区泉四段单一河道砂体宽度与厚度关系7图7扶余油田东区泉四段第10小层单一河道砂体展布特征2.3单一河道内部构型解剖2.3.1单一河道内部构型模式Miall4[14-16]84—45—56—6图8单一河道砂体内部构型模式2.3.2四级夹层倾角的确定442.3.2.1单一河道内部夹层特征951J20135.8m20134——51185图9扶余油田探51区块邻区J20井泉四段水下分流河道砂体夹层垂向序列10cm420.1～0.3m1/32.3.2.2单一河道内部夹层倾角的确定4D21-30.4D21-29.2D21-33.4D21-31D21-30.410D21-29.2D21-33.4D21-31D21-30.4D21-29.2D21-3132D21-33.410[17-20]图10水下分流河道砂体内部隔夹层剖面分布图186Vol.40No.2tanθ=(h1h2)/L21表1扶余油田东区单一河道内部夹层倾角计算参数及结果h1/mh2/mL/m/(°)8.54.6112.72.03.11.544.51.86.03.346.11.54.32.255.81.75.52.373.52.05.34.175.72.040°～2°1034410[4]440°～2°2.4三维构型建模54555411[21-25]图11扶余油田探51区块扶余油层4小层三维储集层构型栅状图3514“”40°～2°4符号注释：GRAPISPmVRMINVΩ·mRMNORΩ·mR050.5mΩ·mΔtμs/mR252.5mΩ·mhmWmRLLSΩ·m；RLLDΩ·mLmh1h2参考文献：[1]MiallAD.Architectural-elementanalysis:anewmethodoffaciesanalysisappliedtofluvialdeposits[J].EarthSciRev,1985,22(2):261-308.[2],,,.[J].,2012,39(3):295-303.YangHua,FuJinhua,LiuXinshe,etal.AccumulationconditionsandexplorationanddevelopmentoftightgasintheUpperPaleozoicoftheOrdosBasin[J].PetroleumExplorationandDevelopment,2012,39(3):295-303.[3],,,.:[J].,2004,20134——5118726(3):32-35.WangZhenqi,HeZhenming,ZhangChangmin,etal.Analysisonreservoirhierarchyofdeltaicfrontoutcrops:TakingTanjiaheoutcropineasternOrdosBasinforexample[J].JournalofJianghanPetroleumInstitute,2004,26(3):32-35.[4],,,.[J].,2012,33(1):101-105.LiZhipeng,LinChengyan,DongBo,etal.Aninternalstructuremodelofsubaqueousdistributarychannelsandsofthefluvial-dominateddelta[J].ActaPetroleiSinica,2012,33(1):101-105.[5],,,.[J].,2006,30(5):1-3.MaShizhong,WangYibo,CuiYi,etal.Establishmentofthemodelforinter-architectureofunderwaterdistributarychannelinoil-gasarea[J].JournalofDaqingPetroleumInstitute,2006,30(5):1-3.[6],,,.[J].,2009,28(1):26-29.WenLifeng,WuShenghe,YueDali,etal.Studyonclassificationofdistributarychannelsandreservoirconfigurationinterface[J].PetroleumGeologyandOilfieldDevelopmentinDaqing,2009,28(1):26-29.[7].::[M].:,1993:358-360.EditorialCommitteeofPetroleumGeologyofJilinOilfield.PetroleumgeologyofChina:Vol.2:JilinOilfield[M].Beijing:PetroleumIndustryPress,1993:358-360.[8],,,.[J].,2007,31(3):4-7.ZhangQingguo,BaoZhidong,GuoYajun,etal.SedimentarycharacteristicsandmodeloftheFuyuoil-bearingreservoirinFuyuoilfield[J].JournalofDaqingPetroleumInstitute,2007,31(3):4-7.[9],,,.[J].,2008,29(3):334-341.HuXuezhi,BaoZhidong,NaWeihong,etal.SedimentaryfaciesofthefourthmemberoftheQuantouFormationinFuyuOilfield,thesouthSongliaoBasin[J].Oil&GasGeology,2008,29(3):334-341.[10].[J].,2007,28(3):75-79.LiYang.Progressofresear