随钻四极横波测量的数据驱动频散处理方法  

A data-driven dispersive processing of LWD quadrupole wave data

作　　者：孔凡童 庄春喜[1] 苏远大[1] 唐晓明 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,青岛266580

出　　处：《地球物理学报》2017年第12期4938-4944,共7页Chinese Journal of Geophysics

基　　金：国家自然基金(41474092;41604109);山东自然科学基金(ZR2014DL009)资助

摘　　要：针对随钻四极横波测量中的频散效应,本文采用了一种数据驱动的频散处理方法.根据四极子声波频散数据计算慢度概率密度及其拟合函数,再对该函数寻边确定实际地层的横波慢度.该方法在对理论模拟数据及现场随钻测井数据处理中均取得了良好的应用效果,为随钻四极子横波测井提供了一种快速有效的处理方法.A data-driven dispersive method is developed to process the logging while drilling （LWD） quadrupole waveform data. A Slowness Probability Density （SPD） is first calculated from the LWD wave dispersion data and is subsequently fitted with a proper analytical function. By finding the edge of the function, the true formation shear slowness can be determined. We have applied the method to process synthetic and field LWD quadrupole wave data. The results show that the method corrects the dispersion effect in the waveform data and obtains accurate estimates of formation shear slowness.

关 键 词：随钻横波测井 四极子声波 频散效应 数据驱动 慢度概率密度 

分 类 号：P631[天文地球—地质矿产勘探]