The resin sealed column (RESECO) setup for flow-through experiments on solid rocks under high temperature and high pore pressure conditions

Abstract

High-pressure flow-through experiments on solid rock samples are commonly conducted with experimental setups using a confining pressure to restrict the flow to the rock. These setups are often spacious, costly, and difficult to replicate by other researchers due to their individual nature. This work presents the RESECO (resin sealed column) setup which allows flow-through experiments on solid rock without a confining pressure. The column setup is only slightly larger than the sample size and has material costs per sample of a few Euros. The fluid flow is confined to the rock by a cast of epoxy resin using a metal column as an outer casing. The functionality was verified by comparing experimental results with a conventional triaxial cell. Four different rock types with varying hydraulic properties were tested and proven compatible with the setup. Additional endurance tests were performed to investigate the physical limits with regard to pore pressure and temperature. The RESECO setup can be operated with pore pressures of at least 40 MPa and temperatures up to 95 °C, and is therefore suitable for many high-pressure, high-temperature experiments, while being easily reproducible.