Description

The refrigerated overburden centrifuge enables fast, simultaneous measurement of capillary pressure properties and relative permeability curves on up to six core samples, operating at both atmospheric and reservoir conditions with temperatures reaching up to 90°C. The device can also be utilized for sample reservoir condition restoration. Custom designed sample chambers can house core plug samples up to 1.5 inches in diameter and rotate them to a maximum velocity of 4,500 rpm. The apparatus consists of a rotor and cells (core holders) which can accommodate either 1”, 30 mm or 1.5” diameter cores. A digital camera continuously captures high resolution images of the cells, thereby enabling a visual surveillance of the displaced fluid volumes in each cell. An electronic speed control module with sequential speed variation capabilities, and a precision temperature control system are integrated into the device. If the maximum specified temperature is exceeded, the temperature is automatically adjusted accordingly. Furthermore, a rotor imbalance sensor ensures a safe, viable operation.