Abstract:In order to analyzed the transient production performance and transient pressure behavior of acid fracturing gas well of low permeability fractured carbonate reservoirs, the dynamic characteristic analysis model, considering acid fracturing degree and area, stress sensitivity, low-velocity Non-Darcy flow, was established. Logarithmic transformation and perturbation method are used to obtain the rate and pressure transient solution. The research results show that: First, there are eight flow stages in low permeability fractured carbonate acid fracturing gas well, inter-porosity flow can offset production decline. Second, low-velocity non-Darcy flow is obviously affected in middle and late stage, which will weaken the compensation effect of inter-porosity flow and reduce gas well productivity. Stress sensitivity is prominent in late stage, which has little effect on gas productivity and decline rate. Third, the higher the acid fracturing degree, the faster the decline rate, the more obvious the decrease of production performance. The bigger the area of acid fracturing reconstruction the stronger the stable production capacity. It is concluded that low-velocity Non-Darcy flow and stress sensitivity should be considered in low permeability fractured carbonate gas reservoir, and acid fracturing should be based on increasing the scope of construction in order to maintain the stable production capacity.