套管井中仪器偏心对井壁超声电视图象的影响及其校正

Influence of tool eccentricity in a well casing on the ultrasonic televiewer image and its correction processing

文章研究了在套管井中仪器偏心对井壁超声电视图象的影响，提出了基于计算影响所用模型的校正方法。实验结果表明，该方法能较好地消除由于仪器偏心所引起的超声电视图象中的两条垂直黑带，明显地改善图象的质量。经对比度增强后，井壁的细节更加清楚。

The influence of the tool eccentricity in oil well casing on the televiewer image is investigated. A correcting approach based on the computing model is proposed. The processing result shows that the approach can eliminate the vertical black strips on the image caused by the tool eccentricity, and improve reasonably the image quality. By contrast enhancing, the details of the image can be more clarifier.