| 一阶速度-应力Biot双相各向同性介质弹性波 |
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| 引用本文： | 陈可洋.一阶速度-应力Biot双相各向同性介质弹性波[J].计算物理,2011,28(3):404-412. |
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| 作者姓名： | 陈可洋 |
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| 作者单位： | 中国石油大庆油田有限责任公司,勘探开发研究院,黑龙江,大庆,163712 |
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| 摘 要： | 提出一种等价的一阶双曲型速度一应力Biot双相各向同性介质弹性波波动方程,以实现双相介质混合波场中纯快慢纵波和纯横波波场分离的问题.应用散度和旋度理论证明双相介质等价方程波场分离的可行性,采用高阶交错网格有限差分法构建高精度正演算子,推导其PML吸收边界条件和稳定性条件,并对均匀双相介质和层状非均匀双相介质模型进行数值...
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| 关 键 词： | Biot双相各向同性介质 等效波场分离数值模拟方程 纯快慢纵波和纯横波 PML吸收边界条件 固相和流相 |
First-order Velocity-Stress Elastic Wave Field Separation Scheme for Biot Two-phase Isotropic Medium |
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| CHEN Keyang.First-order Velocity-Stress Elastic Wave Field Separation Scheme for Biot Two-phase Isotropic Medium[J].Chinese Journal of Computational Physics,2011,28(3):404-412. |
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| Authors: | CHEN Keyang |
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| Institution: | CHEN Keyang(Exploration and Development Research Institute of Daqing Oilfield Company Limited,Daqing163712,China) |
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| Abstract: | We propose an equivalent first-order hyperbolic velocity-stress Biot two-phase isotropic medium elastic wave equation in order to separate pure fast and slow compress waves and pure shear wave in full wave field of two-phase medium.Feasibility of the method is demonstrated with divergence and curl theory.In a high-order staggered-grid finite-difference scheme forward simulating operator is constructed.PML absorbing boundary condition and stability condition are derived.Isotropic and heterogeneous layered tw... |
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| Keywords: | Biot two-phase isotropic medium equivalent wave field separation numerical simulation equation pure fast & low p wave and s wave PML absorbing boundary condition solid phase and fluid phase |
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