General description of preferential migration passage in water-flood sandstone reservoir

Due to long-term water-flood development in sandstone reservoir,the preferential migration passage has made the water-flooding become low efficiency and invalid recycles,and make the stimulation measures difficult.In this article,by use of production logging data,coring well data,tracer monitoring data,well test data and production performance data,the quantitative or qualitative identification for the existence and development of edge water drive sandstone reservoir channel and its classification method have been studied.It is pointed out that in terms of macroscopic throats parameter calculation,the spatial distribution of channel parameters has not been solved.As for the preferential migration passage development degree classification,the property parameters classification has not been carried out.Therefore,it is of great significance for countermeasures adjustment of preferential migration passage differentiation.