The existence of vugs (empty holes or cavities) in naturally fractured reservoirs has long been observed and can be contributed significantly to reserves of underground natural resources, such as oil, natural gas, and groundwater. A new multi-continuum conceptual model has been developed for investigating multiphase flow behavior through vuggy fractured reservoirs. The conceptual model, based on geological data and observations of core examples from carbonate formations in China, has been implemented into a three-dimensional, three-phase...