一种基于动态目标泛函的全波形反演多解性评估方法

发布时间：2018-02-12 03:27

本文关键词： 全波形反演多解性目标泛函可靠性评估　出处：《中国石油大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：全波形反演是一种精度较高的地下速度建模方法,但其存在计算量巨大、反演多解性、初始模型依赖性强、适用条件苛刻等困难,生产实用化仍然较为困难。将基于动态目标泛函的全波形反演方法应用于反演解的讨论中,利用已有的反演解作为先验信息,通过动态调整目标泛函,在保证地下介质模型能够准确解释地震数据的前提下得到尽可能不同的反演结果。进一步根据数据约束强弱差异选取不同的反演策略,新方法能够对数据覆盖较弱区域的反演结果进行有效评估。在实现算法和反演流程的基础上,通过典型海底模型进行试算。结果表明,新方法能够在保证解的准确性前提下对全波形反演的特征给出合理分析,相对于传统方法计算效率也有了明显提高。
[Abstract]:Full-waveform inversion is a high precision modeling method for underground velocity, but it has many difficulties, such as huge computation, multi-solution inversion, strong dependence of initial model, harsh application conditions, and so on. The full waveform inversion method based on the dynamic target functional is applied to the discussion of the inversion solution. The existing inversion solution is used as the prior information and the target functional is dynamically adjusted. The inversion results are as different as possible on the premise that the underground media model can accurately interpret the seismic data. Further, different inversion strategies are selected according to the difference of data constraints. The new method can effectively evaluate the inversion results in the weak regions covered by the data. On the basis of the algorithm and the inversion flow, the typical submarine model is used to carry out a trial calculation. The results show that, The new method can reasonably analyze the characteristics of the full waveform inversion under the premise of ensuring the accuracy of the solution, and the computational efficiency of the new method is obviously improved compared with the traditional method.
【作者单位】：中国石油大学地球科学与技术学院;海洋国家实验室海洋矿产资源评价与探测技术功能实验室;
【基金】：山东省重大创新工程(2017CXGC1608,2017CXGC1602) 中国科学院战略性先导科技专项(XDA14010303) 国际合作重点项目(41720104006) 国家油气重大专项课题(2016ZX05006-004,2016ZX05014001,2016ZX05002)
【分类号】：P631.4

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