Abstract
A transient flow model of tree-shaped fractal reservoirs is built by embedding a fracture network simulated by a tree-shaped fractal network into a matrix system. The model can be solved using the Laplace conversion method. The dimensionless bottom hole pressure can be obtained using the Stehfest numerical inversion method. The bi-logarithmic type curves for the tree-shaped fractal reservoirs are thus obtained. The pressure transient responses under different fractal factors are discussed. The factors with a primary effect on the inter-porosity flow regime include the initial branch number N, the length ratio α, and the branch angle θ. The diameter ratio gB has a significant effect on the fracture radial flow, the inter-porosity and the total system radial flow regimes. The total branch level M of the network mainly influences the total system radial flow regime. The model presented in this paper provides a new methodology for analyzing and predicting the pressure dynamic characteristics of naturally fractured reservoirs.
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Project supported by the National Science Fund for Distinguished Young Scholars of China (Grant No. 51125019).
Biography: TAN Xiao-hua (1986-), Male, Ph. D. Candidate
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Tan, Xh., Li, Xp. Transient flow model and pressure dynamic features of tree-shaped fractal reservoirs. J Hydrodyn 26, 654–663 (2014). https://doi.org/10.1016/S1001-6058(14)60072-X
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DOI: https://doi.org/10.1016/S1001-6058(14)60072-X