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超声成像测井回波幅度偏心校正方法

Echo amplitude eccentricity correction method for ultrasonic imaging logging

  • 摘要: 超声成像测井过程中因仪器偏心状况而造成图像资料不利于后期解释处理,需要对声成像图像资料进行幅度偏心校正,但是关于幅度偏心校正还没有较好的方法,为了解决此问题,需研究幅度图像的偏心校正方法。该文提出基于理论幅度曲线计算的幅度偏心校正方法,首先计算不同偏心率的理论幅度曲线,同时精心设计了具体的计算实例,通过实验室加工的声学样品开展偏心校正测试,结果显示理论幅度曲线计算结果与实际观测数据的吻合度较高,证明了该校正方法的可靠性,最后完成了实井数据处理,取得了良好效果。这为进一步定量分析井壁幅度图像提供了更加真实的数据,为后续仪器偏心校正技术的优化以及地层特征分析提供了强有力的支持,进一步提升了资料处理结果的准确性,丰富了储层有效性评价手段。

     

    Abstract: Due to the eccentricity of the instrument during the ultrasonic imaging logging process, the image data is not conducive to later interpretation and processing, it is necessary to perform amplitude eccentricity correction on acoustic imaging data. However, there is currently no good method for amplitude eccentricity correction. To solve this problem, it is necessary to study the eccentricity correction method for amplitude images. This article proposes an amplitude eccentricity correction method based on theoretical amplitude curve calculation. Firstly, theoretical amplitude curves with different eccentricities are calculated, and specific calculation examples are carefully designed. Eccentricity correction tests are carried out on acoustic samples processed in the laboratory, and the results show a high degree of agreement between the theoretical amplitude curve calculation results and the actual observation data, proving the reliability of this correction method. Finally, real well data processing is completed, and good results are achieved. This provides more realistic data for further quantitative analysis of wellbore amplitude images, and provides strong support for the optimization of instrument eccentricity correction technology and formation feature analysis in the future, improving the accuracy of data processing results and enriching reservoir effectiveness evaluation methods.

     

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