Abstract: Accurately predicting the well productivity in low permeability reservoir is crucial to reasonably develop it with efficiency. According to the porosity and permeability characteristics of low permeability reservoir in Changqing oil field, the sensitive analysis on reservoir factors which might affect well productivity by applying numerical simulation is conducted, determine the relationship between the single well productivity and oil layer thickness, permeability and oil saturation with the orthogonal analysis is determined, giving the regression formulae of single well productivity prediction with multi-factors. The method has been proved to be simple, convenient and reliable.

Key words: low permeability, well production, productivity prediction, equation