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1. 发明授权

US3794976A Methods and apparatus for acoustically investigating earth formations using shear waves 失效
标题翻译：使用剪切波形进行地震波形调查的方法和装置
公开(公告)号：US3794976A
公开(公告)日：1974-02-26
申请号：US3794976D
申请日：1972-05-30
申请人： SCHLUMBERGER TECHNOLOGY CORP
发明人： MICKLER B
IPC分类号： G01V1/053 , G01V1/46 , G01V1/40
CPC分类号： G01V1/46 , G01V1/053
摘要： In the representative embodiments and modes for practicing the invention disclosed herein, one or more highly-damped acoustic transmitting transducers are arranged for respectively subjecting an adjacent wall surface of a borehole to an almost-instantaneous burst of acoustic energy having a duration which is so short that it may be considered to be a single impulse of acoustic energy in the borehole environment for propagating acoustic shear waves through the formation for reception by a broad-band acoustic receiving transducer disposed adjacent to a remote wall surface of the borehole. The electrical signals produced by these shear waves are processed to obtain measurements which are characteristic of anomalies such as fractures in the earth formation traversed by the acoustic waves.
摘要翻译：在用于实践本文公开的本发明的代表性实施例和模式中，布置了一个或多个高阻尼声发射换能器，用于分别使钻孔的相邻壁表面经历几乎瞬时的声能突发，其具有如此短的持续时间在井眼环境中可以认为是声波能量的单一脉冲，用于传播声波剪切波，通过布置在靠近钻孔远端壁表面的宽带声接收换能器接收。对这些剪切波产生的电信号进行处理，以获得具有异常特征的测量结果，例如由声波穿过的地层中的裂缝。

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