鄂尔多斯盆地上三叠统延长组超低渗储层油气成藏启动压力研究

鄂尔多斯盆地上三叠统延长组超低渗储层油气成藏启动压力研究Title: Study on the Initiation Pressure of Oil and Gas Accumulation in t

鄂尔多斯盆地上三叠统延长组超低渗储层油气成藏启动压 力研究 Title:StudyontheInitiationPressureofOilandGasAccumulationinthe Ultra-LowPermeabilityReservoirsoftheUpperTriassicYan'anFormationin theOrdosBasin Abstract: TheOrdosBasinisoneofthemostsignificanthydrocarbonbasinsin China,withtheUpperTriassicYan'anFormationservingasanimportanttarget foroilandgasexploration.However,theultra-lowpermeabilitycharacteristics oftheYan'anFormationposechallengesforoilandgasaccumulation.This studyaimstoinvestigatetheinitiationpressureofoilandgasaccumulationin theultra-lowpermeabilityreservoirsoftheUpperTriassicYan'anFormation, focusingonthegeologicalandreservoirpropertiesthatinfluencethe initiationpressure.Theresearchfindingsprovidevaluableinsightsforthe understandinganddevelopmentoftheoilandgasresourcesintheOrdos Basin. 1.Introduction 1.1Backgroundandsignificance 1.2Researchobjectives 1.3Researchmethodsanddatasources 2.GeologicalSettingoftheOrdosBasin 2.1Tectonicevolution 2.2Stratigraphy 2.3Structuralcharacteristics 3.ReservoirCharacteristicsoftheUpperTriassicYan'anFormation 3.1Lithologyandsedimentaryfacies 3.2Porosityandpermeability 3.3Physicalpropertiesandpetrophysicalcharacteristics 4.InitiationPressureofOilandGasAccumulation 4.1Definitionandsignificance 4.2Factorsinfluencinginitiationpressure 4.3Methodsofinitiationpressuredetermination 5.ResultsandDiscussion