Characteristics of Dominant Flowing Channels and Throat Volume of Multi-Layer Sandstone Reservoirs in Liuzan Oilfield
For continental reservoirs with strong heterogeneity,long-term water injection may create dominant flowing channels,which will cause rapid water breakthrough in oil wells,thereby reducing the displacement efficiency and resulting in poor development results.Taking the Paleogene Oligocene Shahejie formation of Liuzan oilfield as an example,the litho-electric logging responses,reservoir heterogeneity,injection-production performance,and reservoir pore characteristics were analyzed,the characteristics of dominant flowing channels in the multi-layer sandstone reservoirs of the oilfield were described,and the conditions for the formation of dominant flowing channels in this ar-ea were determined.A calculation method for the throat volume of dominant flowing channels was established.With this method,the amount of profile control agent used in the subsequent operations was clarified to effectively plug the channels.The research results provide a technical support for subsequent oil production stabilization and water control in oilfields.
Liuzan oilfieldShahejie formationsandstonedominant flowing channelpore characteristicpore throat radiusthroat volumeoil stabilization and water control
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