Multicomponent prestack depth migration using the elastic screen method

被引:55
作者
Xie, XB [1 ]
Wu, RS [1 ]
机构
[1] Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Santa Cruz, CA 95064 USA
关键词
D O I
10.1190/1.1852787
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
A 3D multicomponent prestack depth-migration method is presented. An elastic-screen propagator based on one-way wave propagation with a wide-angle correction is used to extrapolate both source and receiver wavefields. The elastic-screen propagator neglects backscattered waves but can handle forward multiple-scattering effects, such as focusing/defocusing, diffraction, interference, and conversions between P-and S-waves. Vector-imaging conditions are used to generate a P-P image and a P-S converted-wave image. The application of the multicomponent elastic propagator and vector-imaging condition preserves more information carried by the elastic waves. It also solves the polarization problem of converted-wave imaging. Partial images from different sources with correct polarizations can be stacked to generate a final image. Numerical examples using 2D synthetic data sets are presented to show the feasibility of this method.
引用
收藏
页码:S30 / S37
页数:8
相关论文
共 36 条
[1]  
Aki K., 1980, QUANTITATIVE SEISMOL
[2]  
Aminzadeh F., 1997, SEG EAGE 3D MODELING
[3]   EXTRACTION OF P-WAVES AND S-WAVES FROM THE VERTICAL COMPONENT OF THE PARTICLE-VELOCITY AT THE SEA-FLOOR [J].
AMUNDSEN, L ;
REITAN, A .
GEOPHYSICS, 1995, 60 (01) :231-240
[4]   Stable wide-angle Fourier finite-difference downward extrapolation of 3-D wavefields [J].
Biondi, B .
GEOPHYSICS, 2002, 67 (03) :872-882
[5]   STUDIES ON CHANGING PROTEIN-LEVELS IN DEVELOPING AND GERMINATING-SEEDS OF LATHYRUS-SATIVUS L [J].
CHANDNA, M ;
MATTA, NK .
JOURNAL OF PLANT BIOCHEMISTRY AND BIOTECHNOLOGY, 1994, 3 (01) :59-61
[6]  
CHANG WF, 1987, GEOPHYSICS, V52, P1367
[7]   REAL DATA RESULTS OF KIRCHHOFF ELASTIC WAVE MIGRATION [J].
DAI, TF ;
KUO, JT .
GEOPHYSICS, 1986, 51 (04) :1006-1011
[8]   THE PHASE SCREEN METHOD FOR VECTOR ELASTIC-WAVES [J].
FISK, MD ;
MCCARTOR, GD .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1991, 96 (B4) :5985-6010
[9]  
FOWLER CMR, 1990, INTRO GLOBAL GEOPHYS
[10]   FORMATION VELOCITY AND DENSITY - DIAGNOSTIC BASICS FOR STRATIGRAPHIC TRAPS [J].
GARDNER, GHF ;
GARDNER, LW ;
GREGORY, AR .
GEOPHYSICS, 1974, 39 (06) :770-780