| 加权方向校正及插值预测吸收边界条件的三维波动方程叠前数值模拟 |
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| 引用本文： | 罗大清,宋炜,吴律,柏森林.加权方向校正及插值预测吸收边界条件的三维波动方程叠前数值模拟[J].石油地球物理勘探,1999(3). |
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| 作者姓名： | 罗大清 宋炜 吴律 柏森林 |
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| 作者单位： | 石油大学!北京(罗大清，宋炜，吴律)，辽河石油勘探局油藏工程处(柏森林) |
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| 摘 要： | 本文在研究Clayton吸收边界条件不足的基础上，给出了三维加权方向校正的Clayton吸收边界条件，并进一步提出了对三维模型角点反射进行衰减处理的插值预测波场法。数值计算表明，改进后的吸收边界条件对边界反射的处理效果，特别是插值预测波场法对边界边线、角点反射的处理效果明显优于Clayton吸收边界条件的处理效果。本文还利用该方法对一个典型的三维地质模型进行了三维波动方程叠前数值模拟，并取得了满意的结果。
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| 关 键 词： | 三维波动方程 叠前数值模拟 有限差分格式 吸收边界 加权方向校正 插值预测 |
3-D wave equation prestack numerical simulation using the absorbing boundary condition that needs weighting-directional correction and interpolation prediction |
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| Luo Daqing,Song Wei,Wu Lu and Bai.3-D wave equation prestack numerical simulation using the absorbing boundary condition that needs weighting-directional correction and interpolation prediction[J].Oil Geophysical Prospecting,1999(3). |
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| Authors: | Luo Daqing Song Wei Wu Lu and Bai |
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| Abstract: | The Clayton absorbing boundary condition that underwent 3-D weighting-di-rectional correction is advanced after analysing the disadvantage of original Claytonabsorbing boundary condition; and interpolated wave-field prediction method isused to attenuate some corner reflections of 3-D model. Numerical computationshows that new absorbing boundary condition gives better boundary reflection at-tenuation; and particularly, interpolated wave-field prediction method attenuatesedge and corner reflections much better than Clayton absorbing boundary condi-tion.This technique has been taken to achieve 3-D wave equation prestack numericalsimulation of a typical 3-D geology model, with satisfactory result. |
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| Keywords: | 3-D wave equation prestack numeric modeling finite difference scheme absorbing boundary weighting-direction correction interpolation prediction |
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