全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

三维保幅弯曲射线Kirchhoff叠前时间偏移方法与应用

DOI: 10.6038/cjg20131028, PP. 3534-3541

Keywords: 弯曲射线,保幅,时间偏移

Full-Text   Cite this paper   Add to My Lib

Abstract:

地震勘探是寻找油气的重要手段之一.对于复杂构造地区,地震偏移成像成为地震资料处理流程中最重要的一环.由于叠前时间偏移尤其是Kirchhoff叠前时间偏移适应性强、计算效率高、成本低的自身特点,该方法在油气勘探中发挥着重要作用.对于该方法的成像精确性的研究有着重大的科研和工业价值.本文利用弯曲射线方法计算走时,加入保幅权函数,结合去假频技术、MPI并行技术,以SEG三维盐丘模型和某区域三维实际资料为研究对象,实现三维保幅弯曲射线Kirchhoff叠前时间偏移.将该方法偏移结果与传统的叠前时间偏移方法偏移结果进行对比分析,结果表明:本文采用的方法主要有以下两方面的优越性:第一,引入了弯曲射线计算走时,实现了弯曲射线叠前时间偏移,提高了成像的精确性;第二,引入了保幅权函数,实现了保幅叠前时间偏移,提高偏移结果的信噪比.

References

[1]  Taner M T, Koehler F. Velocity spectra-digital computer derivation and applications of velocity functions. Geophysics, 1969, 34(6): 859-881.
[2]  Slotnick M. Lessons in Seismic Computing: A Memorial to the Author. Lawrence: Society of Exploration Geophysicists, 1959.
[3]  Tsvankin I, Thomsen L. Nonhyperbolic reflection moveout in anisotropic media. Geophysics, 1994, 59(8): 1290-1304.
[4]  Yilmaz O Z. Seismic Data Analysis. Tulsa: Society of Exploration Geophysicists, 2001.
[5]  Hake H, Helbig K, Mesdag C S. Three-term Taylor series for t2 - x2-curves of P- and S-waves ober layered transversely isotropic ground. Geophysical Prospecting, 1984, 32(5): 828-850.
[6]  刘洋. 反射波分式展开时距方程及其精度分析. 石油物探, 2003, 12(4): 441-447. Liu Y. Fraction expansion time-distance equation of reflection wave and its accuracy analysis. Geophysical Progress for Petroleum (in Chinese), 2003, 12(4): 441-447.
[7]  Bleistein N. On the imaging of reflectors in the earth. Geophysics, 1987, 52(7): 931-942.
[8]  Schleicher J, Tygel M, Hubral P. 3-D true-amplitude finite-offset migration. Geophysics, 2005, 58(8): 1112-1126.
[9]  Winbow G A, Schneider W A. Weights for 3-D controlled amplitude prestack time migration. 69th Annual International Meeting, SEG, Expanded Abstracts, 1999: 1110-1113.
[10]  Zhang Y, Gray S, Yong J. Exact and approximate weights for Kirchhoff migration. 70th Annual International Meeting, SEG, Expanded Abstracts, 2000: 1036-1039.
[11]  Lee S, King D, Lin S. Efficient true-amplitude weights in Kirchhoff time migration. 74th Annual International Meeting. SEG, Expanded Abstracts, 2004: 1089-1092.
[12]  Lumley D E, Claerbout J F, Bevc D. Anti-aliased Kirchhoff 3-D migration. 64th Annnual Internat. Meeting, SEG, Expanded Abstracts, 1994: 1282-1285.
[13]  Wang C S. Accurate spatial directional derivative: Antialiasing Kirchhoff migration. Geophysics, 2004, 69(3): 811-816.
[14]  Castle R J. A theory of normal moveout. Geophysics, 1994, 59(6): 983-999.
[15]  Sun C W, Wang H W, Nartinez R D. Optimized 6th order NMO correction for long-offset seismic data. 72nd Annual International Meeting, SEG, Expanded Abstracts, 2002.
[16]  刘洪, 王秀闽, 曾锐等. 单程波算子积分解的象征表示. 地球物理学进展, 2007, 22(2): 463-471. Liu H, Wang X M, Zeng R, et al. Symbol description to integral solution of one-way wave operator. Progress in Geophysics (in Chinese), 2007, 22(2): 463-471.
[17]  Bleistein N, Cohen J, Jaramillo H. True-amplitude transformation to zero offset of data from curved reflectors. Geophysics, 1999, 64(1): 112-129.
[18]  张宇. 振幅保真的单程波方程偏移理论. 地球物理学报, 2006, 49(5): 1410-1430. Zhang Y. The theory of true amplitude one-way wave equation migration. Chinese J. Geophys. (in Chinese), 2006, 49(5): 1410-1430.
[19]  Abma R, Sun J, Bernitsas N. Antialiasing methods in Kirchhoff migration. Geophysics, 1999, 64(6): 1783-1792.
[20]  Wang C S. Kirchhoff antialiasing methods in the imaging domain. SEG Annual Meeting, 2000.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133