临盘油田盘河构造西翼沙四段断层封堵样式.pdf

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1、2013年8月大庆石油地质与开发Aug．，2013第32卷第4期PetroleumGeologyandOilfieldDevelopmentinDaqingVo1．32No．2DOI：10．3969／J．ISSN．1000—3754．2013．04．002临盘油田盘河构造西翼沙四段断层封堵样式赵可英郭少斌(中国地质大学(北京)能源学院，北京100083)摘要：临盘油田断裂系统非常复杂，断块油藏占90％以上。盘河构造西翼砂体十‘分发育，砂地比达70％，但封堵性仍然很好。早期的断层封堵理论——“砂砂见面不堵，砂泥见面封堵”和“泥岩涂抹”不能

2、很好地解释盘河构造西翼沙四段断层封堵现象。为了弄清研究区断层封堵样式，对钻井、测井等地质资料进行分析，发现断层附近砂岩发生碳酸盐胶结充填是一种普遍现象，并对胶结充填带的成因和胶结变化带对油气的封堵作用进行分析，提出断层胶结充填封堵油气的观点。研究结果表明：研究区断层发育，断层附近砂岩物性急剧变差，自然电位几乎没有幅度，声波时差变小，而电阻率明显升高；油层多、累计厚度大，油柱高度却不大，一般20～40m。关键词：断层封堵；碳酸盐胶结；胶结充填；油气封堵；盘河构造西翼；临盘油区中图分类号：TEl22．1文献标识码：A文章编号：1000—37

3、54(2013)04-000704MoDEoFTHEFAULTBLoCKINSHAMEMBER_4INTHEWESTERNLIMBoFPANHESTRUCTUREoFLINPANOILFIELDZHAOKeying，GUOShaobin(FacultyofEnergyResources，ChinaUniversityofGeosciences，Beifing100083，China)Abstract：ThefracturesystemsofLinpanOilfieldareverycomplexandthefau1t—blockoilr

4、eservoirsaremorethan90％．ThesandbodyinthewesternlimbofLinheStructureiswelldeveloped，thesandstoneandformationra—tiocanreach70％，fortunatelytheblockingcharacteristicsisverygood．Theearlyfaultsealingtheoriesshowthat”whensandstonemeetingwithsandstone，theblockingisnotlikelytohap

5、pen；justtheoppositeoccurswhilesand—stonetouchingwithmudstone；andasthesandstonecoatedbythemudstone，thepluggingphenomenoncannotbemadeclearfortheShaFaultMember4inthewesternlimbofPanheStructure．Inordertoclarifythemodeofthefaultblocking，bymeansoftheanalysesofthegeologicaldata

6、，suchasdrilling，WellloggingandSOon，thecorn—moBphenomenonofthecarbonatecementationhappensinthesandstonenearthefaults．Atthesametime，theana—lysesofthegenesisgofthecementedandfilledbeltandtheactionofthebeltchangesonthehydrocarbonpluggingareconducted，finallytheviewpointofhydr

7、ocarbonpluggingbyfaultcementationandthefillingispresented．Thestudyresultsshowthatthefaultsintheresearchedregionarewelldeveloped，thephysicalpropertiesofthesand-stonenearthefaultsdeterioraterapidly，theself-potentialalmosthasnoamplitude，theintervaltransittimedecrea—ses，butt

8、heresistivityincreasessignificantly；therearemanyoillayers，whichcumulativethicknessisprettygreat，收稿日期：20