越来越多的砂岩油藏或气藏测井研究发现,地层裂缝十分发育,塔里木油田大北地区部分井每米裂缝发育多达十几条,为此建立了低孔多裂缝气藏渗流模型。对模型进行了数值求解,绘制并分析了油藏参数、裂缝条数和裂缝分布影响下的压力动态典型曲线。结果表明:流体在多裂缝系统的流动特征与裂缝条数和裂缝分布有关,压力动态曲线主要分为三个流动阶段:线性流段、椭圆流段和拟径向流段。裂缝导流能力和裂缝半长越大,裂缝线性流段越明显,椭圆形流段出现得越晚。 More and more sandstone reservoirs or gas reservoir logging studies have found that the formation fractures are well developed, some wells in the Dabei area of ​​Tarim Oilfield developed as many as a dozen cracks per meter, for which a multi-fractured gas reservoir porosity and permeability model . The model was solved numerically, and the typical dynamic curves of pressure under the influence of reservoir parameters, number of fractures and distribution of fractures were drawn and analyzed. The results show that the fluid flow in multi-fracture system is related to the number of fractures and fracture distribution. The pressure dynamic curve is mainly divided into three stages: linear flow, elliptical flow and quasi-radial flow. The greater the fracture conductivity and fracture half-length, the more obvious the linear flow section, and the oval flow section appears later.