Moving radius and moving boundary pressure are derived based on its star-tup pressure gradient.Productivity of vertical wells is derived on the above three parameters.

• 基于其启动压力梯度,推导出了宾汉流体的运动半径和运动边界压力求取公式在此基础上推导出了垂直井在稳态状态下的产能预测公式。