粘弹各向异性反射体模型方位地震AVO模拟及分析

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Bibliographic Details
Published in应用地球物理：英文版 Vol. 12; no. 3; pp. 441 - 452
Main Author 郭智奇 刘喜武 符伟 李向阳
Format Journal Article
LanguageEnglish
Published 2015
Subjects
反射体模型
广义各向异性Zoeppritz理论，方位AVO
粘弹各向异性
频散与衰减
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ISSN1672-7975
1993-0658

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Bibliography:Guo Zhi-Qi, Liu Xi-Wu, Fu Wei, and Li Xiang-Yang （1. Geo-Exploration Science and Technology Institute, Jilin University, Changchun 130026, China; 2. Exploration ＆ Production Research Institute, SINOPEC, Beijing 100083, China; 3. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum （Beijing）, Beijing 102249, China. 4. CNPC Key Laboratory of Geophysical Prospecting, China University of Petroleum （Beijing）, Beijing 102249, China）
Reflector, viscoelastic and anisotropic, dispersion and attenuation, generalized anisotropic Zoelopritz theory, azimuthal AVO
We propose a method for mOdeling azimuthal AVO responses from a fractured i reflector. The method calculates the integrated reflected wavetrains, and the wavetrains contain elastodynamic information including the contrast in impedance and anelasticity i across interfaces, the intemal anisotropic propagation, the dispersion and attenuation along i the wave path, and tuning and interference. The results suggest that for large angles of incidence, the velocity dispersion and attenuation increase the amplitudes of PP waves from the top and decrease those from the bottom. For azimuthal responses at specific angles of incidence, the reflected wavetrains of PP waves tend to have longer duration with increasing azimuth. In contrast, model-converted PSV and PSH reflections show stable azimuthal features and are less affected by the reflector thickness. The amplitudes of PSV reflections increase with increasing azimuth; moreover, the waves have no reflection energy at 0° and 90° azimuth and maximum amplitude at 45° azimuth.
11-5212/O
ISSN:1672-7975
1993-0658