The application of multi-layer mining technology in reservoir is gradually extensive. Production splitting and stratification evaluation are regarded as important links

which affect the accuracy of dynamic reserve calculation and the reliability of development policy adjustment. However

the conventional formation coefficient（

Kh

） production splitting method still fails to fully consider the dynamic factors such as reservoir connectivity and pressure difference. Based on darcy formula and other seepage theory

a new production splitting method is put forward to clarify the role of the production of each layer in the development of reservoir. This method introduces the concept of “permeability contribution rate”

which is defined

as the ratio of permeability of each layer to the sum of all permeability of high

middle and low layers

and comprehensively considers the relationship between permeability contribution rate

water content

and splitting coefficient

and proposes the production splitting of multi-layer mining with different permeability layers. Based on the research of eight groups of different permeability levels and polynomial regression calculation

the mathematical model for splitting of liquid production is established for different permeability layers considering water content

permeability range and other parameters. Through the comparison between the numerical simulation and the experimental test results

the splitting mode has small error and high accuracy

which can meet the needs of field application.