中文摘要：

提出了一种新的井内柏控圆弧阵相位控制方式，实现了对地层SH横波的定向发射和接收，在此基础上发展了一种刚用反射SH横波对井外反射体进行远探测的测井方法，旨在突破目前发展的偶极子SH横波远探测方法在地质体方位确定方面的局限性。数值模拟结果表明，合理的相位控制方式可以使得圆弧阵接收（发射）器能够对SH横波进行定向接收（发射），且在目标接收（辐射）方位，不存在SV波场及纵波场的干扰；改变声源和接收器的相位控制方式，可以通过SH波场对井外波阻抗不连续界面的进行扫描，其反射波清晰，方位分辨率高。与传统的单极子纵波远探测方法相比，一方面该方法具有较好的方位分辨能力，能够准确确定反射体在三维空间中的位置，另一方面SH反射波在洞穴、裂缝成像方面更具有优势。与传统的偶极SH横波远探测方法相比，由于该方法引入了具有SH横波定向接收功能的圆弧阵接收器，能够消除反射体方位测量的多解性。

英文摘要：

We propose a new phased control strategy to directionally emit （receive） SH waves into （from） the formation by the phased arc array, and based on this, a new approach to image the reflector outside of the borehole by reflected SH waves is developed, aiming at breakthrough the limitations of azimuth estimating by dipole SH reflection imaging. Numerical results show that the phased arc array with proper phased control strategy is able to directionally emit or receive the formation SH waves, and the SH wave field is not affected by the compressional waves and the SV waves in the target direction. It can scan the formations around the borehole with high azimuthal resolution by changing the phase of each element in arc array. Comparing to the traditional monopole reflection imaging method, on one hand the new proposed method is of good azimuthal resolution and is able to accurate locate reflector in the three-dimensional space, on the other hand the SH reflection imaging method has more advantages in the imaging of caves or fractures than the compressional reflection. Comparing to the traditional dipole SH reflection logging, the new method eliminate the uncertainty of reflector azimuth by utilizing the arc array receivers.