各向异性介质地层中多极源声波测井的现状与发展

STATUS QUO AND DEVELOPMENT OF THEACOUSTIC MULTIPOLE LOGGINGIN ANISOTROPIC FORMATION

多极源声波测井最初是针对直接横波速度测井这一目的而被提出并发展起来的．然而在实际情况中，多极源声波测井的意义除主要集中在横波测量（特别是在软地层时）上以外，更为重要的意义是对井孔周围地层的各向异性作出可能的分析和判断．因此，各向异性介质地层中多极源声波测井的研究已越来越被人们关注和重视，近年来已取得了很大的进展．本文在消化、吸收大量文献的基础上，对各向异性多极源声波测井的发展进行了回顾和分析，对具有非轴对称的地层－井眼模型中多极源声波测井问题的诸方法进行了论述，阐明了各向异性多极源声波测井方法的优越性及其产生和发展的必然性，并分析了未来的可能发展趋势和方向．

coustic multipole logging was presented and developed for the purpose of the direct shear wave logging. However,in actual situation,not only was the acoustic multipole logging focused on the survey of the shear wave (especially in soft formation),but it is also possibly more important to analyze and judge the anisotropy of the formation surrounded the fluid-filled borehole. So the acoustic multipole logging in anisotropy has been concerned and paid attention to,and has been progressing rapidly. On the basis of many references,it is reviewed and analyzed the development of the acoustic multipole logging in anisotropic formation in this paper. The methods about acoustic multipole logging in nonaxisymmetric formation-borehole model are expounded. The superiority and necessity of methods of acoustic multipole logging in anisotropy are explained. The possible developing tendency and directions in future are also analyzed.