弹性波阻抗公式精度及参数敏感性分析  

Accuracy and sensitivity analysis of elastic wave impedance formula

作　　者：冯清源 Feng Qingyuan(Shenhua Geological Exploration Co.,Ltd.,Beijing 102209,China)

机构地区：[1]神华地质勘查有限责任公司,北京102209

出　　处：《能源与环保》2019年第5期95-101,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

摘　　要：从表达形式、理论基础、假设条件出发,系统地介绍了7种纵波弹性阻抗的概念,比较了各弹性阻抗对4类AVO砂岩模型的近似精度,并分析各表达式对背景参数变化的敏感程度。研究结果表明,Verwest弹性波阻抗精度最高,尤其当入射角较大时,且与背景参数无关,稳定性好。Starting from the expression form,theoretical basis and hypothetical conditions,seven kinds of P-wave elastic impedance concepts were systematically introduced.The approximate accuracy of each elastic impedance to four types of AVO sandstone models was compared,and the sensitivity of each expression to the variation of background parameters was analyzed.The results showed that Verwest elastic wave impedance has the highest accuracy,especially when the incident angle was large,and it was independent of background parameters,and has good stability.

关 键 词：反射系数 弹性波阻抗 精度分析 敏感性分析 

分 类 号：TD712[矿业工程—矿井通风与安全]