P-SV波AVO响应特征影响因素分析  

ANALYSIS OF INFLUENCE FACTORS FOR AVO RESPONSE CHARACTERISTICS OF PSV WAVE

作　　者：刘思思[1] 牛滨华[1] 孙春岩[2] 贾冀辉[1] 杨奎[2] 

机构地区：[1]中国地质大学地球物理与信息学院,北京100083 [2]中国地质大学工程技术学院,北京100083

出　　处：《物探化探计算技术》2011年第3期273-279,227,共7页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：为了使响应特征更为明确,便于进行AVO分析和岩性参数的反演,这里针对P-SV波反射系数近似公式,分别对四个理论模型进行了定量计算,并与Zoeppritz方程精确解进行了精度对比分析。结果表明:当小角度入射时,近似公式有很高的近似精度。最后用四类AVO类型进行了P-SV波AVO正演,详细地分析了影响转换波AVO响应特征的根本因素,其主要对横波波阻抗最敏感,这对基于P～SV波的AVO反演精度的提高及多解性的降低具有重要的意义。AVO technology is an effective method in predicting and deciding the fluid properties and lithology of the reservoir.To make the response characteristics clearer and the inversion of AVO analysis and lithologic parameter easier,according to the approximate valuation of reflection coefficient on P-SV wave,the paper carried out quantitative calculation on four theoretical models respectively,and precise comparative analysis with the exact solution of Zoeppritz equation.At last,four AVO models were used in forward modeling of P-SV and the fundamental factors on affecting the response characterizes of converted wave AVO were analyzing in detail which is significant to the improvement of precision and the reduction of interpretation ambiguity on AVO inversion based on AVO.

关 键 词：P-SV波 能量分布 反射系数 AVO正演 

分 类 号：P631.4[天文地球—地质矿产勘探]