Arbeitsbericht NAB 21-22

TBO Bözberg-​2-1:Data Report

To provide input for site selection and the safety case for deep geological repositories for radioactive waste, Nagra has drilled a series of deep boreholes in Northern Switzerland. The aim of the drilling campaign is to characterise the deep underground of the three remaining siting regions.

The Bözberg-​2-1 exploratory borehole is the fourth borehole drilled within the framework of this project. The drill site is located in the southern part of the Jura Ost siting region.

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular from the drilling operations and including the drill site construction.

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular the photo documentation of the cuttings and core samples as well as the resinated core slabs.

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular a detailed description of all encountered lithologies and lithostratigraphic units.

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular the data from detailed microfacies analyses as well as ammonite-​ and palynostratigraphy, complementing the lithostratigraphic report (Dossier III).

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular from the detailed core goniometry and the characterisation of the tectonic structures observed in the drill cores.

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular from the wireline measurements (wireline logging, micro-​hydraulic fracturing and pressure-​meter testing).

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular from the hydrogeological investigations such as hydraulic packer testing.

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular the data from detailed laboratory analyses on core material for petrophysical and geochemical rock and porewater characterisation.

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular from geomechanical laboratory testing on core material, such as triaxial and oedometric testing.

In this report, first results from the Bözberg-​2-1 borehole are presented, in particular from the stochastic petrophysical log analysis combining selected wireline and Multi-​Sensor Core Logger as well as laboratory measurements.

In this report, the results from the Bözberg-​2-1 borehole are summarised in the form of a composite plot, including a short technical explanation of the information displayed.