After the cores were cleaned with tobuence for several days, the displacement experiment was carried out using an AFS-300 displacement system developed by Core Laboratories.
Unsteady-state core-flooding system was designed and utilized for oil water dynamic displacement experiment.
In this displacement experiment, the initial oil saturation, residual oil saturation of the water oil system, critical gas saturation, and the residual oil saturation of the oil gas system were accurately measured to be 0.60, 0.44, 0, and 0.40, respectively.
A one-dimensional long core displacement experiment was designed based on injection of pure foam liquid, air, and air-foam system into the tight matrix core and fracture core.
In this study, oil water based core-flooding system was designed and used to conduct the two-phase dynamic displacement experiment.
A good consistency of displacement efficiency by displacement experiment and numerical simulation is found.
Figure 15 Experiment system.
Laser pulse vaporization experiment system.
The unsteady displacement experiments are performed in CFS-200 core flooding system, which consists of an injection system, four piston accumulators, a TEMCO BP-100 back pressure regulator, a long core holder/slim tubes, a confining pressure system, three differential pressure measurement system, an oil gas separator, a gasometer and computer system for data acquisition and process control.
To compare the recovery efficiency by different EOR technologies, series of oil displacement experiments were carried out in a parallel core system which contained cores with relatively high and low permeability.
