| 气枪激发信号传播的谱元法数值模拟研究 |
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| 引用本文： | 唐杰.气枪激发信号传播的谱元法数值模拟研究[J].地球物理学报,2011,54(9):2348-2356. |
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| 作者姓名： | 唐杰 |
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| 作者单位： | 中国石油大学地球科学与技术学院,东营 257061 |
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| 基金项目： | 国家自然科学基金项目(40574019)、科技部社会公益重点项目(2005DIA3J117)及中国石油大学(华东)博士科研基金(Y0901041)资助. |
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| 摘 要： | 为了研究气枪激发信号的波场,本文利用谱元法对双相介质中波的传播做了数值模拟,分析了波的传播特征.本文主要做了以下工作:(1)研究了使用谱无法(SEM)模拟孔隙弹性介质中波的传播,模拟结果表明,采用谱元法能有效解决双相介质的波场传播模拟问题.(2)验证了Biot理论中慢纵波的存在.双相介质中存在明显的慢纵波,流相波场的慢...
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| 关 键 词： | 气枪震源 场地条件 谱元法 多孔介质 Biot理论 |
| 收稿时间： | 2010-04-26 |
Study on SEM numerical simulation of airgun signal transition |
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| TANG Jie.Study on SEM numerical simulation of airgun signal transition[J].Chinese Journal of Geophysics,2011,54(9):2348-2356. |
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| Authors: | TANG Jie |
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| Institution: | School of Geosciences, China University of Petroleum, Shandong Dongying 257061, China |
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| Abstract: | In order to study the wave field excited by signal gun, we deduce the seismic wave equation from the theory of porous media based on averaged method. We do the numerical simulation of seismic wave propagation by the spectral element method. We mainly do the following work: (1) We present a numerical implementation of the Biot equations for 2-D problems based upon the spectral element method (SEM),the simulation result shows that SEM can simulate wave propagation effectively. (2) Validate the existence of the Biot's slow compressional wave. We study wave propagation at acoustic-poroelastic discontinuities. (3) We study wave propagation in compacted sediments with gradients in porosity, demonstrate the influence of porosity on phase velocity. (4) As the reservoir bottom is limited, we investigate the influence of fluctuant interface on wave propagation. |
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| Keywords: | Airgun source Field situation SEM Poroelastic Biot's theory |
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