OBMI HIGH PRESSURE OVERBURDEN MERCURY INJECTION CAPILLARY PRESSURE SYSTEM, system designed to re-create the down-hole pore configuration for high pressure mercury injection experiments. A unique design tri-axial core holder allows confining pressures of up to 20,000 psig to be applied to sample and mercury to be injected at pressures up to 15,000 psig. By allowing samples to be confined at reservoir pressure the pore structure more closely resembles its original reservoir state allowing more representative capillary pressure determinations to be made.
The system incorporates an environmental chamber containing the hydrostatic core holder with connectivity to the laboratory extraction system allowing mercury vapor to be removed. The chamber also provides a stable temperature environment for the system increasing the accuracy of the volumetric measurements.
High accuracy digital quartz transducer along with two Teledyne Isco 65D high pressure syringe pumps allows complete computer control of both the confining pressure and the mercury injection allowing a constant net overburden to be applied to the sample. The operating software allows for the operator to pre-select pressure steps and stability criteria allowing customization of the fully automated experimental procedure.