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

使用表面/垂直电极系统对 KTB 注入测试后的流体运动进行地电验证

• 批准号: 5447954
• 负责人: Dr. Erik Danckwardt
• 金额: --
• 依托单位: Abteilung Geophysik
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5447954?language=en
• 关键词: Geoelectrical; verification; fluid; movements; after

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.

其目的是估算KTB现场在大量注入测试后，当大量淡水被推下时，电导率的变化。由于注入水与地壳盐水的电导率存在显著差异，地电学方法适合探测近4000 m深度的这种变化和运动。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。淡水注入试验后，安排了三次不同时间间隔的地面钻孔测量。他们的结果将与2002年至2003年生产试验（项目JA 590/19-2）之后的先前测量结果进行比较。间隔七周和六个月的测量将监测发生的流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，将通过瞬态记录仪记录先导孔未下套管部分的自然电场。