In order to accurately predict the well capacity in the fracture of the low permeability gas reservoir

it is necessary to consider the multi-factors. The studies show that the relation between the threshold pressure gradient and the average reservoir permeability of the low permeability gas reservoir is the power function. The deformation of the media function makes the stress sensitiveeffect more serious

and the slippage effect makes the gas seepage resistance down and increases the well productivity. Accordingto the conformal transformation theory

we established a prediction model of fracturing well productivity

which considered thestress sensitivity

the slippage effect and the changed threshold pressure gradient

and studied the effects on the productivity. Theresults showed that

with the increase of the stress sensitivity coefficient

the gas well output decreases

and the pressure of the lowwell bottom flow is more affected. The lower the flow pressure of the bottom hole is

the more obvious the gas well output changeswith the increase of slip coefficient. The threshold pressure gradient factors greatly affect the well productivity in a certain range.Therefore

it is necessary to consider the influence of many factors on the gas well productivity in the prediction of the productioncapacity of the low permeability gas reservoir.