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.
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收藏
页码：261 / 267
页数：6
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