密度测井曲线对合成地震记录质量的影响

Effect of Density Log on Quality of Synthetic Seismogram

密度曲线对合成地震记录质量的影响很少被单独关注,依据制作合成地震记录的原理与方法,通过对反射系数公式简化处理,使声波曲线与密度曲线对反射系数的贡献由隐性化变得显性化,对密度测井曲线在制作合成地震记录时的作用进行了重新认识。通过使用一口井的试验资料,分析了密度测井曲线对合成记录质量的影响,使用实测密度曲线合成的地震记录质量优于用转换密度且显著高于用常数密度得到的合成记录。

Effect of density log on the quality of synthetic seismogram is rarely noticed.According to the theory and creation method of synthetic seismic records,we focused on making invisible contribution of acoustic log and density log to the reflection coefficient become explicit through simplified treatment of reflection coefficient formula in this article,which revaluated the effect of acoustic log and density log in making synthetic seismic records.Through the test of a given well data,we analyzed the effect of three different density access methods on the quality of synthetic seismogram respectively.The quality of synthetic seismogram using actually measured density is better than that using transition density and it’s significantly higher than that with constant density.