Diagnosis and quantitative characterization method for sandstone reservoir water-flooding development channeling strip

The invention relates to a sandstone reservoir water injection development channeling stripe diagnosis and quantitative characterization method which comprises the following steps: establishing a numerical simulation model of a reservoir containing a channeling stripe by applying a numerical simulation method based on evaluation area geology, fluid and production materials; a water content derivative is introduced into the numerical simulation model, and qualitative diagnosis is carried out on a reservoir internal channeling strip according to a simulation result; r and S are defined as water content derivative characteristic values, M is defined as a channeling strip development index, a numerical simulation method is applied, the water injection development process under the conditions of different initial water saturation degrees and different channeling strip development indexes M is simulated, and according to the water content simulation results of the oil producing well under different conditions, the