Simulation and interpretation of experiments

Usually SCAL flow experiments are influenced both by the capillary pressure and the heterogeneity pattern, while in the interpretation of the data both these effects are frequently assumed to be negligible. Neglecting the capillary pressure may lead to residual oil saturations that are 10 saturation units higher than the true residual oil saturation. The error due to the neglect of capillary pressure may be unraveled utilizing a numerical simulator. Therefore, there is a significant business value in interpretation by simulation.

The petroleum laboratory offers a unique suite of products and services for special core analysis. We particularly focus on simultaneous determination of both two-and three-phase estimates of permeability and capillary pressure function from data obtained through laboratory experiments. Our capabilities include methods for fully accounting for capillary effects as well as possible rock heterogeneities by the core flood simulator Sendra.

This is another coreflood simulator used by our laboratory. Coreflow is a tool developed for fast simulation and interpretation of steady state core floods with account for capillary and gravity effects.

Simulation: The program calculates profiles of saturation, relative permeabilities and phase pressures along the core, as well as average saturations and total pressure drops across the core. The calculation is done for a user-specified number of cases, each defined by fractional flow and total flow rate. The program handles both two-phase and three-phase flow.

Interpretation: The program is used for fast interpretation of experimental steady state core floods to derive realative permeabilities corrected for capillary and gravity effects. The capillary pressure must be measured seperately. An iterative procedure, where the measured pressure drops and average saturations are matched, is implemented in the current version. The interpretation option is for two-phase flow.