FLECAS-HT is a unique flow-through system enabling the simultaneous measurement of permeability and electrical resistivity (co-axial 4-electrode arrangement) on rock cylinders with a diameter of 30 mm and a length of 75 mm at temperatures of up to 500 °C. Currently, FLECAS-HT can be operated at a maximum confining Ar-gas pressure of 40 MPa, and a pore fluid pressure of 25 MPa. Due to the corrosive nature of high enthalpy aqueous fluids, the sample must be encapsulated with a gold tube.

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FLECAS was designed as versatile and transportable core analysis system for the investigation of consolidated and unconsolidated rocks under reservoir temperature and pressure conditions. It comprises a measuring setup for the measurement of porosity, permeability, electrical resistivity, ultrasonic compressional and shear wave velocities and amplitudes. The system was applied to
(1) study of gas hydrate bearing sediments in the frame of the Mallik 2002 gas hydrate production research well …

The lab contains devices that can be used to monitor chemical and physicochemical parameters in natural and synthetic geothermal fluids. For instance,

• A versatile fluid-chemical monitoring unit (“FluMo”) has been developed that enables online and in-situ measurements of a variety of physico-chemical parameters at different surface locations of a geothermal fluid loop.
• The Fluidflow Monitor and Reactor Unit (FluMoRe), consisting of two 50 L stainless steel vessels, enables storage and …

The High-Temperature Fluid Measuring Cell is a flow-through device that allows measuring the electrical conductivity of highly corrosive aqueous fluids in dependence of pressure and temperature. So far, the facility was used to study geothermal high-temperature reservoirs at temperatures up to 425 °C and fluid pressures up to 350 bar. Beyond the determination of intrinsic fluid properties, the measuring cell is capable to study the effect of fluid–rock interactions at supercritical conditions.

LARS is large volume experimental apparatus for the investigation of anthropogenic induces and natural occurring reservoir processes under simulated in situ conditions in the lab. The sediment sample has a diameter of 0.45 m and a length of 1.35 m. This large sample allows the installation of "model wells" for the injection and production of pore fluids as well as the installation of different sensors to monitor various physical parameters during an experiment.
The apparatus was set up …

In the laboratory for fluid chemistry, various devices are used to determine the chemical properties of geothermal fluids.

In the laboratory for fluid physics, various devices are used to determine the properties of geothermal fluids: density, viscosity, electrical conductivity, thermal conductivity, heat capacity, sonic velocity.

With the mechanical testing system (MTS) hydrostatic pressures up to 140 MPa and temperatures up to 200 °C can be simulated. The pressure and temperature within the chamber are continuously monitored by an external pressure sensor and two internal thermocouples (Type K). Within the pressure chamber, the thermocouples are located at top and bottom of the test specimen. To measure the axial and lateral strains of the sandstone samples, two axial extensometers and one circumferential chain …

The experimental task is to realize controlled long-term investigations on the permeability evolution of sedimentary rocks at simulated pressure- and temperature conditions pertinent to geothermal reservoirs.
Therefore, The investigations are performed in a set of two apparatuses that allow a variety of continuous petrophysical measurements at a maximum temperature, lithostatic- and pore pressure of 200 °C, 140 and 50 MPa, respectively. The typical flow rate is 15 ml/h and the anticipated …

One of the most important reservoir parameters is permeability, which defines the ability of a liquid to flow through a porous medium. Various set-ups are available in our laboratories to determine the permeability under different pT conditions. The standard sample sizes (D/L) are 25 mm/50 mm and 30 mm/40 mm. The permeability is always measured in a stationary manner (Darcy or Darcy-Klinkenberg), but it is also possible to determine low permeabilities using the transient pressure pulse method. …