Different types of equipment are available. It is common to use cores of consolidated reservoir rock or reservoir-like rock (i. e. sandstones such as Clashack, Berea, Bentheimer, Felzer, etc., and carbonates such as chalk, limestone, etc.). Core dimensions normally range from d x l = 2.8 cm x 7.7 cm to d x l = 5.1 cm x 51.2 cm.

A flow rig constructed for smaller consolidated cores is shown in Fig. 40. This is constructed to operate under simulated reservoir conditions, i. e. temperatures up to 150°C and pressures up to ~450 bar. The core is mounted in a Viton or neoprene rubber hose and an overburden pressure of ~20 bar is exerted onto the rubber hose in the external chamber in order to prevent any leakages along the surface of the core.

Instead of the permanently mounted vertical core, a Hassler cell (illustrated in Fig. 41) may be used, which permits the choice of any angle of the core from horizontal to vertical. A method has also been developed to permit the use of unconsolidated material in this equipment.

Other equipment is based on the use of crushed rock material to fill chromatographic columns of varying dimensions.

Figure 42 illustrates a flow rig based on a 200 cm long chromatographic column with an internal diameter of 11 mm.