Fast near-surface model building with turning wave

被引：0

作者：

Guo Z. ^{[1
]}

Sun P. ^{[1
]}

Qian Z. ^{[1
]}

Li P. ^{[1
]}

Tang B. ^{[1
]}

Xiong D. ^{[1
]}

机构：

[1] Research & Development Center, BGP inc., CNPC, Zhuozhou, 072751, Hebei

来源：

Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | 2019年 / 54卷 / 02期

关键词：

Inversion; Near-surface; Statics; Tomography; Turning wave; Velocity model building;

D O I：

10.13810/j.cnki.issn.1000-7210.2019.02.003

中图分类号：

学科分类号：

摘要：

Conventional first-arrival travel time tomography based on iterative inversion is computationally intensive and time consuming, especially in a large-scale data processing. In order to improve the efficiency of near-surface modeling, a fast near-surface model building with turning wave is developed by assuming that the near-surface velocity is transversely constant within the maximum offset range and varies linearly with the depth. In order to improve the accuracy of inversion, a multi-datum correction method is adopted to reduce the influence of surface undulation on the inversion results. In order to enhance the stability of inversion, a local weighted ray parameter estimation is developed to increase the robustness with respect to noise. Synthetic and real data tests verify the validity and efficiency of the proposed method. © 2019, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.

引用

页码：261 / 267

页数：6