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我站自行研制的D6—2型补偿声速测井仪的设计特点:采用电缆对称浮地传输和峰值时差获取方式,排除了测井过程中信号幅度变化和比较电平调节对测量数值的影响,明显地减少了测量误差;采用干扰抑制方案,使得本机对声速测井过程中的主要干扰——碰撞干扰具有较强的抑制能力;机内设有声波时差累计单元,可完成所测井段声波时差的累计和记录;机内设有声幅测量单元,可在套管井内做固井质量检查测量。为了便于仪器的检查和调节,本机还设有简易的二踪电子示波器以及测量数码显示等。野外试验和生产实践表明,仪器性能达到设计指标。
The design features of the D6-2 compensated sonic logging tool developed by our station: The symmetrical floating transmission and peak time difference acquisition methods are used to eliminate the influence of signal amplitude change and comparison level adjustment on the measured values during logging, The measurement error is obviously reduced; the interference suppression scheme is adopted to make the local machine have a strong suppression ability to the main interference in the sound velocity logging process - the collision interference; the sound wave time difference accumulating unit is provided in the machine to complete the logging section Acoustic wave of accumulated and recorded time; machine equipped with a sound amplitude measurement unit can be done in the cased hole cementing quality inspection and measurement. In order to facilitate the inspection and adjustment of the instrument, the machine also has a simple two-track electronic oscilloscope and measurement of digital display. Field experiments and production practices show that the performance of the instrument meets the design specifications.