塔中奥陶系优质储集层特征及断裂控制作用.pdf

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1、石油勘探与开发7162011年12月PETR0LEUMEXPLORATIoNANDDEVEL0PMENTVO1．38No．6文章编号：1000—0747(2011)06—0716．09塔中奥陶系优质储集层特征及断裂控制作用罗春树，杨海军2一，李江海，谢会文2，黄广建2(1．北京大学地球与空间科学学院；2．中国石油塔里木油田公司勘探开发研究院；3．中国地质大学(北京))基金项目：国家科技重大专项“塔中碳酸盐岩礁滩型和层间岩溶型凝析气藏高效勘探开发”示范工程(2011ZX05049)摘要：塔中北坡上奥陶统礁滩体和下奥陶统鹰山组风化壳为两套优质储集层，早期分别受台地边缘高能相带和早奥陶世风化壳

2、的控制，后期受到断裂活动的整体改造。综合研究认为，塔中北坡奥陶系储集层的类型和分布规律均与断裂活动有关。塔中奥陶系两套优质储集层受3期重要断裂运动的控制：早奥陶世末的区域拉张奠定了塔中I号坡折带形成的基础，促进了下奥陶统鹰山组风化壳岩溶储集层的形成及随后上奥陶统礁滩体的沉积；奥陶纪末的大规模挤压运动促使塔中北坡发育盐相关构造(沿中寒武统的膏盐层产生滑脱与盐拱)，断裂同时改造礁滩体和风化壳储集层；志留纪末的走滑断裂活动对奥陶系储集层的改造有限，却控制着喜马拉雅期塔中奥陶系气侵的部位。图10表1参12关键词：碳酸盐岩；礁滩体；风化壳；塔中I号断裂；滑脱；盐拱；走滑断裂中图分类号：TEl21．

3、1文献标识码：ACharacteristicsofhighqualityOrdovicianreservoirsandcontrollingeffectsoffaultsintheTazhongarea，TarimBasinLuoChunshur，YangHaijun。，一，LiJianghai，XieHuiwen，HuangGuangjian(1．SchoolofEarthandSpaceSciences，PekingUniversity,Beijing100871，China；2．ResearchInstituteofExplorationandDevelopment，PetroCh

4、inaTarimOilfieldCompany，Korla841000，China；3．ChinaUniversityofGeosciences，Beijing100083，China)Abstract：TheexplorationduringrecentyearsinthenorthernslopeoftheTazhongarea，TarimBasin，indicatesthattheOrdovicianstratahavetwosetsofhighqualityreservoir,i．e．theUpperOrdovicianreef-beachbodyandtheYingshanFo

5、rmationweatheringcrustoftheLowerOrdovician，whichwererespectivelycontrolledbyhighenergyfaciesatplatformedgesandearlyOrdovicianweatheringCrustintheearlyperiodandmodifiedbyfaultinginthelaterperiod．ComprehensiveresearchshowsthatthetypesanddistributionrulesofOrdovicianreservoirsintheno．hemslopeoftheTa

6、zhongareaarerelatedtofaulting．ThispaperdemonstratesthecontrollingefectsofthreeperiodsoffaultingontheabovetwosetsofOrdovicianhighqualityreservoirs：(1)TheEarlyOrdovicianregionalextensionlaidthefoundationfortheformationofTazhongNo．1slopebreakandledtotheformationoftheYingshanweatheringcurstkarstreser

7、voirsinLowerOrdovicianandthesubsequentsedimentationofUpperOrdovicianreef-beachbodies；(21TheintensecompressionattheendofEarlyOrdovicianpromotedthedevelopmentofsaltrelatedstructuresintl1enorthernslopefthedetachmentandsal