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井下电视成像技术是基于数字视频体制的井下实时成像技术,成像测井的结果采用展开式钻孔柱状图方式表示,直观形象,便于分析,对工程钻探测井起到举足轻重的作用。文章结合某水库工程坝基透水率勘察,对勘察过程中钻孔透水率异常段采用井下电视成像技术进行分析,并结合钻孔岩芯和地质压水试验成果对比分析,确定坝基透水率较大段岩体的具体成因,从而对坝基防渗处理提供科学依据。
Downhole TV imaging technology is a downhole real-time imaging technology based on digital video system. The result of imaging logging is expressed by exploding borehole histogram, intuitive image, easy to analyze and play an important role in engineering drilling logging. Combined with the investigation of water permeability of dam foundation of a reservoir project, the downhole TV imaging technique is used to analyze the abnormality of the permeability of borehole during the investigation. Based on the comparative analysis of the drilling core and the comparison of the test results, The specific causes of rock mass, so as to provide a scientific basis for anti-seepage treatment of dam foundation.