2013 · 20 citations · 0 references
EngineeringPetroleum EngineeringReservoir CharacterizationReservoir EngineeringSubsurface Fluid FlowPetrophysical AnalysisPetrophysical EvaluationPore Structure AnalysisPorosity AnalysisReservoir ArchitectureTight Oil ReservoirsFluid DistributionNuclear Magnetic Resonance Pore AnalysisNuclear Magnetic Resonance StudiesOil SaturationOil Saturation PropertiesPore-size DistributionPoresTight Reservoir Characterization
The Chang7 tight oil reservoir in Ordos basin was tested by nuclear magnetic resonance(NMR). The results show that the pore size distribution of Chang7 tight oil reservoir is extremely wide, with big size pores, intermediate size pores, small pores, micro-pores and nano-pores all existed. The parameters, such as pore size, pore composition, principal pore type, are closely related to compactness of the reservoir. Almost all pores, from big size to nanometer size in tight oil reservoir contains oil, and the oil saturation in micro-pores and nano-pores are acceptably high. The identification of pore types in tight oil reservoir, especially micro-pores and nano-pores, and cognition of oil saturation in these pores have great significance to the exploration and development of tight oil resources in Ordos basin.