Geoelectrical verification of fluid movements after the KTB Injection Test using surface / vertical electrode systems

目的是估计大注入试验后大量淡水下推后KTB-site电导率的变化。由于注入水与含盐地壳水的电导率存在显著差异，地电方法适合探测近4000 m深度的此类变化和运动。为了达到更好的分辨率，表面测量必须由垂直电剖面系统（VES）完成，该系统是在早期研究JA 590/19-1和JA 590/19-2（孔表面测量）期间开发的。在淡水注入试验后，安排了三次不同时间间隔的地面井眼测量。他们的结果将与2002年至2003年生产试验之后的前测量结果进行比较（JA 590/19-2项目）。每隔7周和6个月进行一次测量，以监测发生的液体运动及其恢复平衡。最后提供了自2001年以来所做的所有测量的最终解释。此外，导孔的非套管部分的瞬态记录仪将记录自然电场。

The aim is the estimation of changes in conductivity at KTB-site after the big injection test when a large amount of fresh water was pushed down. Because of the significant differences of the conductivity between injected water and saline crust water, geoelectrical methods are qualified for detecting such changes and movements in a depth of nearly 4000 m. For reaching better resolutions, the surface-measurements have to be completed by the Vertical Electrical Profiling System (VES), which was developed during the earlier researches JA 590/19-1 and JA 590/19-2 (hole-surface-measurements). Three surface-hole-measurements in different temporal intervals were scheduled after the fresh water injection test. Their results will be compared with former measurements beyond the production test from 2002 till 2003 (project JA 590/19-2). Measurements in an interval of seven weeks and an interval of six months will monitor occurred fluid movements and their returning to balance. It is finally provided to give a final interpretation of all measurements that have ever been done since 2001. Additionally the natural electrical field will be recorded by transient recorders in the uncased part of the pilot hole.