According to Oliver method, with perturbation theory and Laplace transform theory, approximate analytical solution of general heterogeneity gas reservoir is deduced.

• 运用扰动原理和Laplace变换的方法,按照Oliver的思路推导了一般非均质气藏的近似解析解。 同时,推导了径向非均质气藏的反求渗透率的ISA法、YA法和MYA法。