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《Progress In Geophysics》 2003-02
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Three dimensional finite difference numerical simulation of elastic wave propagation under borehole conditions

YANG Hui-zhu1, ZHANG You-sheng1, TAO Guo2(1.Department of Engineering Mechanics, Tsinghua University, Beijng 100084, China;2.Department of GeoSciences, University of Petroleum, Beijing 102249, China)JZ)  
The improved Higdon absorbing boundary condition was derived in this paper. Various borehole and formation conditions were simulated using the fourth order accuracy in space and second order accuracy in time centered finite difference method. The numerical simulate result of orthorhombic medium formation and elliptic borehole conditions are presented. The wave field of monopole and dipole source are simulated and analysed, which agree well with the theory of elastic wave propagation.It indicates that with the improved Higdon absorbing boundary condition , the three dimensional program on acoustic log can be used to simulate the wave field of complex borehole conditions.
【Fund】: 石油天然气集团中青年创新基金开放项目 ( 2 0 0 2CXKF- 4) .
【CateGory Index】: P631.81
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