| 多项式的井间地震速度场反演方法 |
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| 引用本文： | 乐友喜,曾有良.多项式的井间地震速度场反演方法[J].物探与化探,2006,30(2):169-171,174. |
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| 作者姓名： | 乐友喜 曾有良 |
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| 作者单位： | 中国石油大学,地球资源与信息学院,山东,东营,257061 |
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| 摘 要： | 基于契比雪夫多项式的旅行时反演方法,不需进行入射角扫描,首先用多项式表示出深度和慢度,计算出从源点到接收点的旅行时间,通过与实际时间的误差修改模型参数,经过反复迭代,最终得到地下复杂构造的界面形态和速度变化。与网格化速度反演方法相比,计算的未知数少,对初始地质模型的依赖性小。模型试算表明,在初始地质模型与实际地质模型差别较大时,仍能取得比较好的反演结果。
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| 关 键 词： | 射线追踪 井间地震 多项式 速度反演 层析成像 |
| 文章编号： | 1000-8918（2006）02-0169-03 |
| 收稿时间： | 2005-09-14 |
| 修稿时间： | 2005-09-14 |
THE CROSSWELL SEISMIC VELOCITY INVERSION METHOD BASED ON POLYNOMIAL |
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| YUE You-xi,ZENG You-liang.THE CROSSWELL SEISMIC VELOCITY INVERSION METHOD BASED ON POLYNOMIAL[J].Geophysical and Geochemical Exploration,2006,30(2):169-171,174. |
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| Authors: | YUE You-xi ZENG You-liang |
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| Institution: | Institute of Earth Resourees and Information, University of Petroleum, Dongying 257061, China |
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| Abstract: | The method determines the incidence angle for every ray through scanning, and hence has very large computation work and needs to provide a relative precise preliminary geologic model. This paper introduces a kind of travel time inversion method based on polynomial. First, the depth and slowness can be expressed hy Chebyshev polynomial. Then the structure and velocity variation of the complex construction can be acquired through iteration. Compared with the grid velocity inversion, this method has less unknown numbers, and does not need to provide a precise preliminary geological model. Model calculations show that the result achieved is close to the actual geologic model. |
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| Keywords: | ray tracing crosswell seismic polynomial velocity inversion tomographic imagery |
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