声波测井技术的重要进展——偶极横波远探测测井

近年来单井反射声波远探测技术的一个重要进展是利用偶极声波探测仪器来发射和接收地层深部的反射信号。本文首先介绍了单井反射声波成像技术的研究进展。然后,从偶极横波成像原理、充液井孔中偶极远场辐射指向性、偶极声源激励下的井外声场分布、反射横波幅度和反射系数、偶极横波数据中的反射波分析和现场资料处理实例分析等方面详细论述了偶极声波远探测技术。最后,讨论了这门技术今后改进和发展的方向,通过本文读者可以了解偶极横波远探测技术的原理、方法、效果和应用前景。

Significant progress of acoustic logging technology: remote acoustic reflection imaging of a dipole acoustic system

An important recent advance in single-well acoustic reflection imaging is the utilization of a dipole acoustic system in a borehole to emit and receive elastic waves to and from a remote geologic reflector in formation.This paper first briefs on the status of the single-well imaging technology and follows up on the dipole shear wave imaging.It elaborates on several important aspects of dipole shear wave imaging,including dipole source radiation from a fluid-filled borehole,the distribution of the radiated wave-field in the formation,the reflection of shear waves from geologic boundaries in formation,and the reception of the reflected waves using dipole receivers in the borehole.Field data processing examples will be used to demonstrate the unit features of the dipole shear-wave imaging.Finally,we discuss future improvement and development trend of this technology.Through this paper,readers can have an understanding of the theory the methods of the newly-developed technology and its application scope.