13078.延氣2井區(qū)上古生界低滲致密砂巖氣藏研究

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3、hHe8～ShanxiGrouponfightsandstonegasreservoircharacterizationYanqi一2gaswellblockAbstractTIlispaperbasedonoilandgasreservoirgeologysedimentarypetrologystructuralgeologylogginggeologyandothertheories，withcoreobservation，sam

4、plingandanalysistest，loginterpretationandotherinformationinthestudyarea，fortheYanqi2gaswellblockoftightsandstonegasreservoirsconductedasmalllayeroffinegasreservoircontrast，structuralcharacteristicsresearch，sedimentaryfac

5、iesresearch，analysisofreservoircharacteristicsandotherexplorationresearch，conductedacomprehensiveevaluationoftightgasreservoirsByfinescalestratigraphiccorrelation，ThegroupfromHe8toShanxiissubdividedinto18singlelayerswith

6、theirsedimentarysubfaciesasdeltafrontThesedimentarymicrofaciesaredistributarychannelchannelmarginandinterdistributarybayThemouthbarandalluvialfanarerelativelylessdeveloped。ThedistributarychannelsofHe一8～ShanxiGroupareexte

7、ndingalongnorthsouthdirectionwith3～4channelsbetweenlkm～3kminwidthAttheintersectionareaofthosechannels，thesuperpositionwidthreachesto5km～10kmwhilethesandthicknessis5～l0mThebraidedoranastomosedfeaturesareformedduetothedist

8、ributarychannelsintersectingindifferentareasThegasbeatingsandisnotonlycontrolledbytheextensionofsedimentarymicrofacies，butalsotheeffectofdiagenesisTherefore，thereservoirisseverelyaffectedbysedimentaryenvironment，diagenes

9、is，physicalpropertyandgasaccumulationlevel111eresearchindicatedthatShanxiGroupsubdividedlayerShan23ismainlyformedinII、IIITypeFormationwhilesomeportionsdevelopTypeIShan22，Shan21Shanl3LayersaremainlydevelopingIVTypeFormati

10、ons，secondlyIIITypeShanl1He82andHe81LayersaretypeIII、IVFormationsThedeltasedimentarysystemandbarrierbarswhichformthelithologicaltrapsprovideaneffectivemigrationpathwayandaccumulationspaceforthenearbynaturalgasTheregional

11、tectonicscharacteristicsareofnocontrollingeffectonnaturalgasdistributionsincegashasbeenproducedfromboththehighandlowpositionofthegeologicalstructure111elocalstructuresalsodonotplayacontrollingroleongasdistributionsincebo