基于单偶极混合测量模式的反射波测井方法研究

作者：宫昊,陈浩,何晓,苏畅,王秀明,王柏村,严晓辉

摘要：In this paper,we theoretically and numerically study a combined monopole–dipole measurement mode to show its capability to overcome the issues encountered in conventional single-well imaging,i.e.,the low signal-to-noise ratio of the refl ections and azimuth ambiguity.First,the azimuth ambiguity,which exists extensively in conventional single-well imaging,is solved with an improved imaging procedure using combined monopole–dipole logging data in addition to conventional logging data.Furthermore,we demonstrate that the direct waves propagating along the boreholes with strong energy,can be effectively eliminated with the proposed combined monopole–dipole measurement mode.The reflections are therefore predominant in the combined monopole–dipole data even before the signals are filtered;thus,the refl ections’arrival times in each receiver are identifi ed,which may help minimize the diffi culties in fi ltering conventional logging data.The optimized processing fl ow of the combined measurement mode logging image is given in this paper.The proposed combined monopole–dipole measurement mode may improve the accuracy of single-well imaging.

发文机构：Tsinghua University State Key Laboratory of Acoustics University of Chinese Academy of Sciences Chinese Academy of Engineering

关键词：SingleWELLimagingAZIMUTHAMBIGUITYMULTICOMPONENTwaveseparation

分类号： P631.81[天文地球—地质矿产勘探][天文地球—地质学]