原名「台灣學術線上」
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項次 書目
1
題名:Prestack Inverse-Ray Imaging of A 2D Homogeneous Layer: A Tutorial Study    
著者:Tan K. Wang
出版地區:台灣
出版城市:台北市
學科:地球科學
關鍵字:Common offset ; Common shot ; Complex structure ; Image source ; Prestack depth migration ; Reflected ellipse ; Travel time
刊名:Terrestrial, Atmospheric and Oceanic Sciences
卷期:13卷4期(2002.12)
頁碼:399-416
語言:英語
摘要: 英文摘要PDF

Traveling directions of an inverse ray for the common shot, the common midpoint and the common offset gathers are explicitly determined from the geometry of reflected rays and an envelope of two reflected ellipses in a 2D homogeneous irregular layer. I find that a common shot gather and a common offset gather can be applied to image the structural velocity and interface. However, due to the symmetry of the travel-time hyperbola, a common midpoint gather is not suitable for structural imaging. Furthermore, from a common offset gather, the poststack inverse ray is proved as a special case of the prestack inverse ray. Error analysis of the prestack inverse ray indicates that the method of elliptic envelope provides more accurate imaging at far offsets than the method of ray geometry if the travel-time picks are limited along a reflected hyperbola. Alternatively, when the travel-time picks are sufficient, the method of ray geometry is superior to the method of elliptic envelope. The prestack inverse ray is also applied to image a sedimentary basin. The results suggest that the best way for applying the prestack inverse ray is to determine the layer velocity from ray geometry and to image the structural interfaces by considering both methods.




本卷期目次
Terrestrial, Atmospheric and Oceanic Sciences 13卷4期 (2002.12)
Prestack Inverse-Ray Imaging of A 2D Homogeneous Layer: A Tutorial Study/ Tan K. Wang
Numerical Simulations with MM5 3DVAR Initialization/ Ching-Yuang HuangYing-Hwa KuoWei Huang
Typhoon Rainfall over Taiwan Area: The Empirical Orthogonal Function Modes and Their Applications on the Rainfall Forecasting/ Tien-Chiang Yeh
The Biennial Oscillations in Taiwan/ Mong-Ming Lu
Possible Sources of the Difference between a Model Prediction and Observations of Bow Shock Crossings/ Aleksey V. DmitrievJih-Kwin ChaoYa-Hui YangChing-Huei LinDe-Jin Wu
Reduction in Sunshine Duration over Taiwan: Causes and Implications/ Shaw-Chen LiuChung-Ho WangChein-Jung ShiuHsiu-Wu ChangChang-King HsiaoShuh-Haung Liaw
The Penghu Submarine Canyon off Southwestern Taiwan: Morphology and Origin/ Ho-Shing YuJen-Fu Chang
Discussion and Comparison of the Mapping Functions in Radio Frequencies/ Hao-Jian YanGui-Xia ZhangPeng GuoZheng-Jie Hong
 
   
 
   

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