| 不依赖子波的弹性波混合域全波形反演 |
| |
| 引用本文： | 杨涛,张会星,史才旺. 不依赖子波的弹性波混合域全波形反演[J]. 石油地球物理勘探, 2019, 54(2): 348-355. DOI: 10.13810/j.cnki.issn.1000-7210.2019.02.013 |
| |
| 作者姓名： | 杨涛 张会星 史才旺 |
| |
| 作者单位： | 1. 中国海洋大学, 山东青岛 266100;2. 青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室, 山东青岛 266071;3. 海底科学与探测技术教育部重点实验室, 山东青岛 266100 |
| |
| 基金项目： | 国家重点研发计划项目“声信号对极区冰层和海底的响应及其声学参数观测技术”（2018YFC1405900）、国家自然科学基金项目“OBN宽频多分量地震资料的纵横波联合逆时偏移方法研究”（41674118）、“部分饱和孔隙介质中地震波的衰减和频散机理研究”（41204089）和国家科技重大专项“东海深层大型气田勘探评价技术”（2016ZX05027-002）联合资助。 |
| |
| 摘 要： | 震源子波的准确性直接影响全波形反演的建模效果，获取准确的实际子波十分困难。本文基于去子波影响的褶积法，提出弹性波混合域不依赖子波的全波形反演策略。基于二阶弹性波应力-位移方程的混合域反演理论，把观测地震记录与模拟记录的特征道、模拟记录与观测记录的特征道在频率域做乘积运算，构造了不依赖子波的弹性波混合域全波形反演目标函数，推导了反传震源的理论公式。最后，对Overthrust模型进行试算，得到了较好的反演结果，验证了该方法的可行性。
|
| 关 键 词： | 全波形反演 弹性波方程 混合域 子波 褶积 |
| 收稿时间： | 2018-08-18 |
Wavelet-independent elastic wave full waveform inversion in hybrid domain |
| |
| YANG Tao,ZHANG Huixing,SHI Caiwang. Wavelet-independent elastic wave full waveform inversion in hybrid domain[J]. Oil Geophysical Prospecting, 2019, 54(2): 348-355. DOI: 10.13810/j.cnki.issn.1000-7210.2019.02.013 |
| |
| Authors: | YANG Tao ZHANG Huixing SHI Caiwang |
| |
| Affiliation: | 1. Ocean University of China, Qingdao, Shandong 266100, China;2. Laboratory of Marine Mineral Resource Evaluation and Detection, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong 266071, China;3. Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Qingdao, Shandong 266100, China |
| |
| Abstract: | The accuracy of seismic wavelet can directly affect the modeling effect of full waveform inversion.In practice,it is very difficult to get the exact wavelet.In view of this problem,we develop a strategy of elastic wave full waveform inversion in hybrid domain based on the convolution for wavelet-influence removal.Based on the second-order elastic wave stress-displacement equation,we carry out a theoretical calculation of full waveform inversion.The objective function of the full waveform inversion of the elastic wave in hybrid domain is obtained by the multiplication of seismic records with characteristic traces of simulated records and the multiplication of simulated records with characteristic traces of seismic records.The theoretical formula of the reverse source is derived.Finally,numerical calculations on the Overthrust model obtain good inversion results,which verify the feasibility of the proposed approach in hybrid domain. |
| |
| Keywords: | full waveform inversion elastic wave equation hybrid domain wavelet convolution |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《石油地球物理勘探》浏览原始摘要信息 |
|
点击此处可从《石油地球物理勘探》下载全文 |
|
