Fluid production test at the KTB-VB

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The Kontinentale Tiefbohrprogramm der Bundesrepublik Deutschland (KTB) was enormously successful. It has revealed a wealth of geoscientific data and new results of unrivalled quality and broadness. However, several of the main objectives have only been marginally investigated, and the scientific potential of the two KTB boreholes, the 4.0 km deep pilot hole (KTB-VB) and the 9.1 km deep main hole (KTB-HB) has by no means fully exploited. The general aim of this and accompanying projects is to study energy and fluid transport processes in continental fault systems at the KTB drill site. For that purpose it is proposed to carry out a fluid production test during a period of 12 months in the KTB-VB. During the test various geophysical, hydraulic and geochemical parameters will be monitored in real-time. Samples of uncontaminated deep seated crustal fluids and gases will be taken regularly for further detailed geochemical, geobiological and isotopic investigations. Data and samples will be provided to several research groups from different institutions for further detailed evaluation. Within this project, the operational work, and tasks of the science team will be co-ordinated, also geochemistry and isotopic composition of crustal gases will be investigated in detail.