Germany - Type of order: Delivery order Title of the contract: Supply of a NMR-B

Description

Type of order:
Delivery order

Title of the contract:
Delivery of a NMR borehole probe with accessories incl. functional test & training according to specifications

Brief description:
A research focus of the Research and Development Center for Mining Consequences at the
BGR is, among other things, the use of adapted monitoring tools for the scientific
scientific investigation of the effects of the dismantling of surface and underground mining sites.
Particularly relevant here are changes in groundwater quantity
(groundwater availability) and quality (groundwater contamination, e.g. with iron oxide and sulphate).
sulphate). The use of an NMR probe is particularly suitable for this purpose because
water content, pore space properties and, derived from this, iron content in the aquifer can be recorded in situ.
aquifer can be recorded in-situ. Recent research at the BGR has shown
that information about the redox state of the aquifer can be derived from NMR measurements
can be derived if certain conditions are met. In order to remain active in this
be able to continue to be active in this field and to be able to
depth-resolved ground truthing or to transfer them into new adapted applications, a new
applications, a new compact NMR probe is to be procured for use in groundwater monitoring
groundwater monitoring wells, which should fulfill the requirements listed in detail below.
requirements listed below.
This probe is intended to incorporate significant new advances in measurement technology made in recent years, particularly with regard to
years, particularly in terms of reducing the size of the device and thus making it easier to handle in the field.
handling in the field. The compact size also makes it possible to investigate areas that are
areas that are difficult to access or have restricted access and thus to obtain in-situ hydrogeological
parameters. Thanks to the compact design, it is possible to obtain high-resolution depth information
from the unsaturated and saturated zone. With the possibility of recording so-called T1-
T2 maps, current BGR research, for example in the field of iron contamination of groundwater or the
the iron contamination of groundwater or the degree of degradation of peat soils can be actively
be actively supported. Furthermore, the presence of at least two NMR
excitation frequencies and a diameter of the sensitive volume between 10 and 15 cm,
the monitoring of already developed groundwater measuring points. Due to the excitation frequencies used
frequencies in the range below 2 MHz, the measurement data obtained can be directly compared with laboratory
laboratory NMR data measured at the BGR and their evaluation can be combined or supplemented.
be combined or supplemented. With echo times of max. 500µs, it is possible to determine the relevant pore space, which
the subject of the BGR's current research questions described above.
investigations described above. The compact design of the probe offers the
The compact design of the probe allows it to be used in small groundwater measuring points with a maximum diameter of 51mm (2),
which can be sunk using the drilling equipment available at the FEZB.
be used. By using direct-push technology, measurements can also be carried out without
measuring points can be carried out without the need for a prior extension.

Opportunity closing date

07 October 2024

Value of contract

to be confirmed