LARS (LArge Reservoir Simulator)
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 0.45m and a length of 1.35m. 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 together with section 4.2 with in the first funding phase of the SUGAR project. This project aims to study innovative methods for the production of methane from methane hydrate.
A prerequisite for these tests was the production of sufficient amounts of methane hydrate in the pore space of the sediment sample from methane dissolved in water. This hydrate formation mechanism is assumed to be responsible for the observed high hydrate accumulations in sandy reservoirs.
For the process monitoring of hydrate formation and hydrate decomposition during production an electrical resistivity tomography (ERT) with 375 electrodes was installed within the second funding phase of the SUGAR project. The ERT allows to distinguish between the conducting pore water and the electrically insulating methane hydrate/methane gas in the pore space.
The system allows to study hydrate formation processes as well as different hydrate production methods in a systematical way.