In order to study the productivity characteristics of low permeability reservoirs with natural fractures

we established a prediction model of natural fractured reservoir productivity considering stress sensitivity differences between matrix and natural fractures based on the theory of plane radial flow. After that

we derived the productivity equation of natural fracture reservoir considering the difference of matrix and natural fracture stress sensitivity. Then taking the basic data of the low permeability oilfield as an example

we calculated and analyzed the influence of fracture parameters

matrix stress sensitivity coefficient and crack stress sensitivity coefficient on productivity by the productivity equation above. The results showed that with the increase of matrix stress sensitivity coefficient

the oil well productivity decreased. When the crack width was small

the stress sensitivity of fractures had a significant impact on the oil production. Therefore

in the low permeability reservoirs with natural fractures

increasing the length of the fractures and linking more microcracks would be beneficial to the increase of production.