Two-phase pore-fluid distribution in fractured media: acoustic wave velocity vs saturation |
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| Authors: | Xi Duan Xiang-Jun Liu |
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| Institution: | 1.Department of Geosciences,Southwest Petroleum University,Chengdu,China;2.Department of Science,Southwest Petroleum University,Chengdu,China |
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| Abstract: | The acoustic wave velocity varies with fluid saturation and pore-fluid distribution. We use a P-wave source and the staggered grid finite-difference method, with second-order accuracy in time and eighth-order accuracy in space, to simulate the acoustic wave field in a fractured medium that is saturated with a two-phase pore fluid (gas & water). Further, we analyze the variation of acoustic wave velocity with saturation for different pore-fluid distribution modes. The numerical simulation method is simple and yields accurate results. |
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