| 摘要: |
| 针对常规的非线性反演方法存在稳定性较差及易陷人局部极值的问题,采用小波变换将原问题分解在不同的 尺度上进行迭代反演，并以大尺度搜索为起点,逐步缩小尺度，最终降至目标函数的原始尺度，同时通过界约束以增 加解的稳定性。对理论模型和实际资料分别进行的叠前弹性波反演结果表明，所提方法能有效提高反演的稳定性及 精度。 |
| 关键词: 慢度法 小波变换 多尺度 叠前弹性波反演 |
| DOI：10.3969/j.issn.1673-5005.2010.02.008 |
| 分类号:P 631.443 |
| 基金项目:国家“863”高科技发展计划项目(2007AA060504) |
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| Multi-scale prestack elastic-wave inversion by wavelet transform based on slowness method |
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YIN Wen1,2,HAN Wen-gong1,WANG Yan-guang1,SHEN Guo-qiang1,3
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(1. Geophysical Research Institute of Shengli Oilfield Company limited t SINOPEC, Dongying 257022, China;2. Vocation College, Dong Ying City, Dongying 257091，China;3. College of Geo-Resources and Information in China University of Petroleum, Dongying 2570619China)
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| Abstract: |
| Due to the problems of poor stability and falling into local minimum easily in routine nonlinear inversion，wavelet transform was used to decompose original problem to different scale and iterative inversion. Then, scale was reduced step by step with the great scale search as the beginning so as to fall to primitive scale of the objective function ultimately. Simultaneously ，search boundaries were set up to stabilize the solutions. The results by the inversion of theoretical model and real seismic data show that the proposed method can effectively improve the stability and accuracy of the inversion. |
| Key words: slowness method wavelet transform multi-scale prestack elastic-wave inversion |
