摘要
根据不同地质条件及测井环境下自然电位形成的原因,对氧化还原电位、扩散吸附电位、过滤电位等自然电位异常曲线特征进行了剖析。并用二个实例介绍了重锤蚀变及工业游散电流对自然电位测井的影响,如重锤蚀变所测曲线等效于叠加一个"底部梯度电极系"所产生的电位差,导致自然电位曲线与视电阻率曲线具有相似性,而工业游散电流则会产生不规则的锯齿状干扰。针对上述二种干扰对实测曲线的影响程度,提出了在测井过程中应采取的措施及处理办法。
According to origin of spontaneous potential under different geological condition and well logging environment, analyzed spontaneous potential anomalous trace characteristics of oxidation-reduction potential, diffusion-adsorption potential and electrofihration potential. Two examples were used to introduce impact factors of spontaneous potential logging from weight dropper electrical erosion and industrial stray current. Such as weight dropper electrical erosion measured trace is equivalent to stack a ＂ bottom gradient sonde＂ produced potential difference and caused similarity of spontaneous potential traces and resistivity traces. While industrial stray current will produce irregular serrated interference. In allusion to impact extent to measured traces from above two kinds of interference, put forward countermeasures and processing methods should be used during well logging.
出处
《中国煤炭地质》
2008年第12期20-23,共4页
Coal Geology of China
关键词
氧化还原电位
扩散吸附电位
过滤电位
自然电位
测井
oxidation-reduction potential
diffusion-adsorption potential
electrofiltration potential
spontaneous potential
well logging
