Research on Identification and Control of Dominant Seepage Channels in Medium and Low Permeability Reservoirs

The low-permeability branch network channel sand is developed in Block S, and it has entered the stage of ultra-high water cut development as a whole. In order to further tap the remaining oil and improve the water injection utilization rate, research on the identification and treatment of advantageous seepage channels is carried out. Using the eclipse tracer simulation method, combined with coring well data, relative permeability curve and dynamic data to establish a quantitative identification method for dominant seepage channels, and verify and classify it; Reasons for the formation of dominant seepage channels; finally, control measures are formulated for different types of dominant seepage channels. After implementation, ineffective water injection is effectively controlled and reservoir production is improved. This method can be applied to the S oilfield where the block is located, which can effectively improve the development effect of the oilfield.