Multi-component AVO response of thin beds based on reflectance spectrum theory  

作　　者：Chen Tiansheng Liu Yang 

机构地区：[1]CNPC Key Lab of Geophysical Exploration, China Universityof Petroleum, Beijing 102249, China

出　　处：《Applied Geophysics》2006年第1期27-36,共10页应用地球物理（英文版）

基　　金：The research was supported by the Notion's Fifteenth Scientific and Technological Breakthrough Project: Research of Vector and Mountain Seismic Exploration (No.2001BA605A-12).

摘　　要：Seismic AVO analysis now is one of the major criteria for recognizing potential hydrocarbon reservoirs. Volume scattering information that carries information of stratigraphic structure, lithology, and pore fluid is more useful for seismic exploration. However, traditional AVO analysis is based on the Zoeppritz equation, which only contains single-interface information. Quantitative interpretation of the thin bed thickness is essential to thin bed structure interpretation, reservoir description, and lateral reservoir prediction. The reflectance spectrum equation based on the elastic wave propagation matrix in the frequency domain derived in this paper shows that both interfaces and intervals have an effect on amplitude. The equation includes information about both single interfaces and volume scattering. Since the reflectance spectrum equation is a continuous function of thin bed thickness and frequency, it is convenient to analyze the effects of a single frequency and bed thickness on the reflectance spectrum. Bed thickness is analyzable until the bed thickness is vanishingly small. These characteristics can＇t be achieved by Fourier transform. The propagation of seismic waves is complex and various wave modes exist simultaneously. The reflectance spectrum includes various propagating wave modes and multiples and is better for simulating multi-component thin bed AVO responses than the ray tracing method.地震 AVO 分析现在是为认出潜在的烃水库的主要标准之一。带 stratigraphic 结构，岩性学，和毛孔液体的信息的体积散布信息为地震探索是更有用的。然而，传统的 AVO 分析基于 Zoeppritz 方程，它仅仅包含单个接口的信息。薄床厚度的量的解释对薄床结构解释，水库描述，和侧面的水库预言必要。基于在频率的有弹性的波浪繁殖矩阵，域在这篇论文导出的反射光谱方程证明接口和间隔在振幅上有效果。方程关于单个接口并且体积散布包括信息。因为反射光谱方程是薄床厚度和频率的连续功能，在反射光谱上分析单个频率和床厚度的效果是方便的。床厚度是可被分析的直到床厚度是 vanishingly 小的。这些特征不能被 Fourier 变换完成。震波的繁殖是复杂的，各种各样的波浪模式同时存在。反射光谱包括各种各样的宣传波浪模式和 multiples 并且对模仿多部件更好薄床 AVO 回答比跟踪方法的光线。

关 键 词：AVO MULTI-COMPONENT thin bed reflectance-spectnun. 

分 类 号：P631.4[天文地球—地质矿产勘探]