eng Science and Education Publishing American Journal of Applied Mathematics and Statistics 2328-7292 2015-04-19 3 2 80 85 10.12691/ajams-3-2-7 AJAMS2015327 article Wen-wen Xia 1 Shun-chu Li lishunchu@163.com 1 Dong-dong Gui 2 Institute of Applied Mathematics of XiHua University, Chengdu, China Beijing Dongrunke Petroleum Technology Co.,Ltd., Beijing, China This paper introduces the fractal theory into composite reservoir with double-porosity, and establishes the radial seepage model of fractal composite reservoir with double-porosity. Based on the similar structure theory of solutions for the boundary value problem of differential equation, the similar structure expression of solutions can be obtained in Laplace space. The similar structure theory of solution which avoids the complex calculation is used to solve the model, meanwhile, the similar structure expression of solution reflects the influence of different parameters for the bottom pressure. http://pubs.sciepub.com/ajams/3/2/7/ajams-3-2-7.pdf radial seepage composite reservoir with double-porosity laplace transformation similarity kernel function similar structure