针对多层层间无窜流，原始地层压力不同，各层物理、几何参数不同、无封隔器合采情况下的试井问题，考虑井 储与表皮，定义了多层合采试井的无量纲初始井筒压力，从而给出了试井模型样板曲线计算方法和分层参数的拟合方法。试井模型的限制条件如下：各层为均质油藏，内边界是全部射开直井，外边界可以是无限大，一条边界，角度油藏，封闭油 藏等任意几何形状。通过计算对其中几个典型情况下的多层油藏压力动态进行了分析。 Aiming at the problems of well test in the condition of no channeling flow between layers, different original formation pressures, different physical and geometrical parameters of each layer, Dimensionless initial wellbore pressure, and then gives the fitting method of curve calculation method and layering parameter of well testing model. Well testing model constraints are as follows: Each layer is a homogeneous reservoir, the inner boundary is all shot straight vertical wells, the outer boundary can be infinite, a boundary, angle reservoir, closed reservoir and other arbitrary geometry. Several typical cases of multi-reservoir pressure dynamics were analyzed.