[an error occurred while processing this directive] | Global Geology 2019, 22(1) 29-35 DOI: 10.3969/j.issn.1673-9736.2019.01.04 ISSN: 1673-9736 CN: 22-1371/P | ||||||||||||||||||||||||||||||||||||||||||||
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Influences of coarse grid selection on Kirchhoff beam migration | |||||||||||||||||||||||||||||||||||||||||||||
LI Jiabin1, SUN Hui1,2, ZHANG Zhihou1, HAN Fuxing3, LIU Minchen3 | |||||||||||||||||||||||||||||||||||||||||||||
1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China; 2. School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China; 3. College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China | |||||||||||||||||||||||||||||||||||||||||||||
ժҪ�� Kirchhoff beam migration is a beam migration method,which focuses on rapid imaging of geological structures.Although this imaging method ignores the amplitude information in the calculation process,it can calculate multi-arrival traveltime.This migration method takes into account both imaging accuracy and computa-tional efficiency.Kirchhoff beam migration employs coarse grid techniques in several key steps such as travel-time calculation,weight function calculation,and imaging calculation.The selection of the coarse mesh size has an important influence on the computational efficiency and imaging accuracy of the migration imaging meth-od.This paper will analyze this influence and illustrate the analysis results by the Marmousi data sets. | |||||||||||||||||||||||||||||||||||||||||||||
�ؼ����� Kirchhoff beam migration prestack depth migration coarse grid selection beam propagator trav-eltime calculation | |||||||||||||||||||||||||||||||||||||||||||||
Influences of coarse grid selection on Kirchhoff beam migration | |||||||||||||||||||||||||||||||||||||||||||||
LI Jiabin1, SUN Hui1,2, ZHANG Zhihou1, HAN Fuxing3, LIU Minchen3 | |||||||||||||||||||||||||||||||||||||||||||||
1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China; 2. School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China; 3. College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China | |||||||||||||||||||||||||||||||||||||||||||||
Abstract: Kirchhoff beam migration is a beam migration method,which focuses on rapid imaging of geological structures.Although this imaging method ignores the amplitude information in the calculation process,it can calculate multi-arrival traveltime.This migration method takes into account both imaging accuracy and computa-tional efficiency.Kirchhoff beam migration employs coarse grid techniques in several key steps such as travel-time calculation,weight function calculation,and imaging calculation.The selection of the coarse mesh size has an important influence on the computational efficiency and imaging accuracy of the migration imaging meth-od.This paper will analyze this influence and illustrate the analysis results by the Marmousi data sets. | |||||||||||||||||||||||||||||||||||||||||||||
Keywords: Kirchhoff beam migration prestack depth migration coarse grid selection beam propagator trav-eltime calculation | |||||||||||||||||||||||||||||||||||||||||||||
�ո����� 2018-11-02 ������ 2018-12-26 ����淢������ | |||||||||||||||||||||||||||||||||||||||||||||
DOI: 10.3969/j.issn.1673-9736.2019.01.04 | |||||||||||||||||||||||||||||||||||||||||||||
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Supported by projects of the Natural Science Foundation of China (No.41804100),the China Postdoctoral Science Foundation (No.2018M640910) and the Fundamental Research Funds for the Central Universities (No.2682018CX36). | |||||||||||||||||||||||||||||||||||||||||||||
ͨѶ����: SUN Hui | |||||||||||||||||||||||||||||||||||||||||||||
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����Email: sunhui@swjtu.edu.cn | |||||||||||||||||||||||||||||||||||||||||||||
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?ervený V, Popov M M, Pšen?ík I. 1982. Computation of wave fields in inhomogeneous media-Gaussian beam ap-proach. Geophysical Journal ofthe Royal Astronomical So-ciety, 70(1):109-128. French W S. 1975. Computer migration of oblique seismic re-flection profiles. Geophysics, 40(6):961-980. Gray S H. 2005. Gaussian beam migration of common-shot re-cords. Geophysics, 70(4):S71-S77. Hagedoorn J G. 1954. A process of seismic reflection interpre-tation. Geophysical Prospecting, 2(2):85-127. Hale D. 1992. Computational aspects of Gaussian beam migra-tion. DOI:10.2172/7200248 Hale D. 1992. Migration by the Kirchhoff, slant stack, and Gaussian beam methods. DOI:10.2172/7115487 Hill N R. 1990. Gaussian beam migration. Geophysics, 55(11):1416-1428. Hill N R. 2001. Prestack Gaussian-beam depth migration. Ge-ophysics, 66(4):1240-1250. Liu J, Palacharla G. 2011. Multiarrival Kirchhoff beam migra-tion. Geophysics, 76(5):WB109-WB118. Liu J, Marcinkovich C. 2013. Shot-profile Kirchhoff beam mi-gration//83th Annual International Meeting, SEG Ex-panded Abstracts. Nowack R L, Sen M K, Stoffa P L. 2003. Gaussian beam mi-gration for sparse common-shot and common-receiver da-ta//73th Annual International Meeting, SEG Expanded Abstracts. Schneider W A. 1978. Integral formulation for migration in two and three dimensions. Geophysics, 43(1):49-76. Sun Y, Qin F, Checkles S, et al. 2000. 3-D prestack Kirch-hoff beam migration for depth imaging. Geophysics, 65(5):1592-1603. Xu S, Lambare G, Calandra H. 2004. Fast migration/inver-sion with multivalued ray fields:Part 2-applications to the 3D SEG/EAGE salt model. Geophysics, 69 (5):1320-1328. Xu S, Lambare G. 2004. Fast migration/inversion with multi-valued ray fields:Part 1-method, validation test, and application in 2D to Marmousi. Geophysics, 69 (5):1311-1319. Yue Y B, Li Z C, Zhang P, et al. 2010. Prestack Gaussian beam depth migration under complex surface conditions. Applied Geophysics, 7(2):143-148. |
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