渗透气藏孔喉致密存在应力敏感性,而且气井投产前普遍进行压裂,因此建立考虑应力敏感性的气井产能模型具有一定的意义。选用塔里木低渗透气藏的岩心开展应力敏感性实验,实验表明低渗透气藏存在较强的应力敏感性,渗透率越低,应力敏感性系数越大,应力敏感性越强。将压裂气井的渗流区域划分为裂缝两端的径向流和裂缝两边的线性流推导了考虑应力敏感性的压裂气井产能模型。应力敏感对压裂气井产能有较大影响,应力敏感性越强的气藏,产能损失率越高,随着井底流压的降低,应力敏感性引起的产能损失增加。压裂是改善受应力敏感性影响的低渗气藏气井产能的有效途径。 There is stress sensitivity in the pore-throat densification of gas reservoirs, and the fracturing is generally carried out before the gas well is put into operation. Therefore, it is of great significance to establish a well productivity model considering stress sensitivity. The core of the Tarim low-permeability gas reservoir is selected to conduct stress-sensitivity experiments. The experiments show that there is strong stress sensitivity in the low-permeability gas reservoirs. The lower the permeability is, the greater the stress sensitivity coefficient is and the greater the stress sensitivity is. Dividing the seepage area of ​​fractured gas wells into radial flows at both ends of the fractures and linear flows on both sides of fractures leads to the productivity model of fractured gas wells considering stress sensitivity. Stress sensitivity has a significant impact on the productivity of fractured gas wells. The more stress-sensitive gas reservoirs, the higher the capacity loss rate. With the decrease of bottom hole flow pressure, the productivity loss caused by stress sensitivity increases. Fracturing is an effective way to improve the productivity of gas wells in low permeability reservoirs affected by stress sensitivity.