苏里格气田低渗透储层微观孔隙结构特征及其分类评价方法.pdf

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1、第19卷第2期地学前缘(中国地质大学(北京)；北京大学)Vo1．19NO．22012年3月EarthScienceFrontiers(ChinaUniversityofGeosciences(Beijing)；PekingUniversity)Mar．2012苏里格气田低渗透储层微观孔隙结构特征及其分类评价方法李海燕，岳大力，张秀娟1．中国石油大学(Jg京)地球科学学院，北京1022492．大庆钻井工程公司，黑龙江大庆163412LiHaiyan，rueDali，ZhangXiujuane1．FacultyofGeosciences，ChinaUniversi

2、tyofPetroleum(Beijing)，Beijing102249，China2．DaqingDrillingEngineeringCompany，Daqing163412，ChinaLiHaiyan，YueDali，ZhangXi~uan．CharacteristicsofporestructureandreservoirevaluationoflowpermeabilityreservoirinSuligegasfield．EarthScienceFrontiers，2012，19(2)：133‘140Abstract：TakingtheShanla

3、ndHe8segmentsinSuligegasfieldas3nexample，thisstudyfocusedonthemi—croporestructuresoflowpermeabilityreservoir．Basedonthestudyofmercuryinjectiontest，scanningelec—tronmicroscope，andcastingsliceofcorewells，microporestructurewasclassifiedintofourtypesthrougha—nalysisofreservoirporetypesa

4、ndstructures．Characteristicsofeachmicroporestructurewasanalyzedinde—tail．Dualinfluenceofsedimentaryenvironmentanddiagenesisresultedinthecomplexityofthemicroporestructures．ItisindicatedthatthegeneticmechanismofthelowpermeabilityinSuligegasfieldisthestrongcompaction，fillingandcementat

5、ionofautogeneticmineralsduringdiagenesis．Reservoirspacewasdominatedbysecondarypores，andtheporethroatassemblagewasmainlylowpore-smallthroat．WiththeclusterandBayesdiscriminantanalyses，combinedwithsevenmacroandmicroheterogeneityparameters，discriminantfunctionoffourporestructuretypeswas

6、established，porestructuretypesforSuligegasfieldwererecognized，andtheuniversalevaluationmapsofmainminilayersweredrawn．FurtheranalysisindicatesthattypeIandtypeIIreservoirsareofhigh-quality，andconsideredasthefurthertargetsforexplorationanddeveiopmentof1OWpermeabilityShanlandHe8segments

7、．Keywords：lowpermeability；porestructure；discriminantanalysis；reservoirevaluation摘要：以苏里格气田盒8段和山1段为例，开展了低渗透储集层微观孔隙结构特征的研究工作。以取心井压汞测试、扫描电镜、铸体薄片等分析化验资料为基础，通过分析储层的孔隙结构和孔隙类型，将储层微观孔隙结构分为4类，分析了各类微观孔隙结构的特征。沉积环境和成岩作用的双重影响使得盒8段和山1段的储层孔隙结构非常复杂，造成本区储层特低渗透率的主要成因机制为成岩期强烈的压实作用及各种自生矿物的充填和胶结作用。主要的储集空

8、间为次生孔隙，孔喉组合主要为低孔小喉型