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1、中国科技论文在线http://www.paper.edu.cn#四川东部长兴组白云岩储层成岩系统研究张兵，杨凯*（成都理工大学"油气藏地质及开发工程"重点实验室，成都610059）5摘要：在岩心观察与描述、野外剖面实测和样品采集的基础上，结合镜下薄片鉴定、Ｘ衍射分析、物性分析和地球化学特征分析，对四川东部长兴组白云岩储层沉积－成岩系统进行了深入研究。认为长兴组台地边缘生物礁、台地边缘浅滩为最重要的沉积相带，颗粒白云岩、生物礁白云岩和晶粒白云岩为最主要的储集层岩性，晶间孔、晶间溶孔和超大溶孔为最有效10的储集空间，孔洞缝复合型储层为最优质的储集类型。综合分析认为，长兴组沉积－成
2、岩系统与白云岩储层在时空上具有良好的耦合关系，区域上的台地边缘礁滩相控制了长兴组储层的分布范围，而不同成岩系统对储层的贡献程度不同，混合热液成岩系统对储层贡献最大，并形成高孔高渗的孔洞缝复合型优质储层。关键词：四川东部；长兴组；沉积相；储层类型15中图分类号：P618.13DiageneticsystemsofDolomiteReservoirinChangxingformationZHANGBing,YANGKai20(StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversity
3、ofTechnology,Chengdu610059)Abstract:Basedonthedetailedcoreobservationanddescription,filedprofilesmeasurementandsamplecollection,usingthemicroscopicthinsectionidentification,scanningelectronmicroscopyandX-raydiffractionanalysis,wedothestudyonthereservoirsedimentary-diageneticsystemaboutthe25
4、DolomiteinChangxingformationofEasternSichuan,andmakesurethedifferenttypesofdolomite.Wethinkthattheinlandseatrougheastchangxingformationinkaijiang-Liangpingmainlyhasfivesedimentaryfaciesdevelopment,includingforeslope,platformedgereef,platformedgeshallow,openplatformandrestrictedplatform.Theg
5、raindolomite,biologicalreefdolomiteandcrystallinedolomitearethemainreservoirlithology.Wetaketheintergranularsolutionpores,intercrystallineporeand30supersolutionporesasthemosteffectivereservoirspace,andholesewcompositereservoirasthehighestqualityreservoirtype.Throughthecomprehensiveanalyses,
6、ithasthefavorablecouplingrelationshapeinthespace-timebetweenthesedimentary-diageneticsysteminchangxingformationanddolomitereservoir.Theregionalplatformedgereeffaciescontrolsthedistributionofchangxingformationreservoir,differentdiageneticsystemonthereservoircontributionhavethedifferentdegree
7、.35Mixedhydrothermaldiagenesissystemhasthebiggestcontributionforthereservoir,andwhichcanformthehighholeandpermeabilitycomplexhighqualityreservoirsItype.Keywords:EasternSichuan;ChangxingFormation;Sedimentaryfacies;Reservorstpyes;0引言40含油气盆地沉积和成岩作用所构建的沉积－成岩
