ObjectiveTheYubeiareaislocatedinthemid-eastMaigaitislopeofsouthwesternTarimBasin,China,withanexplorationhistoryofseveralyears.RecentexplorationhaspreliminarilyindicatedthattheOrdoviciancarbonateformationsinthisareahavesomeoilandgaspotential.Carbonatemicrofaciesprovidesmaterialbasisforreservoirdevelopment,sealformationandhydrocarbon