Description

The automated saturator sequentially performs vacuum and saturation cycles on both plug and whole core size samples. Initially, the samples are placed in a wire mesh basket, lowered into the saturation cell and the latter is sealed with a threaded plug. Optionally, a large capacity cell can be provided to accommodate full size core samples. The system is then evacuated by applying high vacuum for a few hours. The vacuum pump is connected to the system via a liquid trap tank and a feed tank. This configuration enables both air evacuation and liquid dearation. The trap tank protects the vacuum pump by collecting potential vapor droplets. Once vacuum has been established, the pump is turned off and the system, vented to atmospheric pressure. This causes the deaerated liquid in the feed tank to invade the entire system. Finally, an electric high-pressure pump pressurizes the saturation liquid up to 2,000 psi. This pressure should be sustained for at least four hours to guarantee maximum core saturation. This is confirmed by a stable reading on the manometer. Automated controls are integrated into the system to accommodate the operator. Specifically, via a computer, he/she can open or close the pneumatic valves, operate the vacuum and high-pressure pumps and run automatic saturation cycles.