一种利用走时近似实现各向异性参数估计方法

By establishing a travel time correction model on common center point seismic gathers and utilizing nonlinear relationships and weighted recursion of travel times with zero offset between layers, the problem of large computational load and severe coupling in the anisotropic parameter estimation of existing technologies is solved, achieving efficient and stable parameter estimation, which is suitable for seismic data processing under complex geological conditions.

CN122218817BActive Publication Date: 2026-07-17JILIN UNIVERSITY
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN UNIVERSITY
Filing Date
2026-05-21
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing methods for estimating anisotropic parameters are computationally intensive, highly dependent on the initial model, and have severe coupling between parameters. Especially in multilayer anisotropic media and under large offset conditions, the inversion process is prone to getting trapped in local extrema, making it difficult to guarantee stability and efficiency.

Method used

By acquiring common midpoint seismic gathers, the emission two-way travel times of reflection events are extracted, a travel time correction model is established, and anisotropic parameters are introduced to construct a nonlinear relationship between reflection two-way travel time and offset. Travel time correction processing is performed to obtain equivalent parameters. Then, using weighted recursion of inter-layer zero offset travel times, the inter-layer correction velocity and non-hyperbolic anisotropic parameters are extracted. Finally, the final estimated values ​​of the anisotropic parameters are obtained through interpolation.

Benefits of technology

It significantly reduces the coupling degree of parameter estimation, improves the stability and efficiency of parameter estimation, and can provide more accurate parameter support for seismic data processing in complex geological areas. It is suitable for seismic imaging and parameter inversion of VTI media.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122218817B_ABST
    Figure CN122218817B_ABST
Patent Text Reader

Abstract

本申请属于地震勘探技术领域，为一种利用走时近似实现各向异性参数估计方法，包括：获取共中心点地震道集并进行预处理；提取共中心点地震道集的反射事件的发射双程走时，采用共中心点地震道集建立走时校正模型，所述走时校正模型引入各向异性参数构建反射双程走时与偏移距的非线性关系；根据反射双程走时与偏移距的非线性关系对不同地层分别进行走时校正处理，获得各层等效参数；从等效参数中剥离出层间校正速度和层间非双曲各向异性参数；计算每一层的各向异性参数；在共中心点地震道集上按固定道间距重复走时校正和等效参数的剥离，获得稀疏参数分布，插值得到各向异性参数的最终估计值。能够有效提高各向异性参数估计的精度与稳定性。
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Seismic anisotropy parameter full waveform inversion method and device

    CN103713315A

  • Non-hyperbolic velocity scanning and dynamic correction method

    CN104834009A