NEW MESOFLUIDIC SYSTEM DESIGNED TO STUDY THE EFFECT OF SNAP-OFF ON DISPLACEMENT. FLUID/FLUID AND REMEDIATION BY STEAM INJECTION

Abstract

The capillary medium is a highly complex environment that presents several petrophysical parameters as well as viscous and capillary phenomena, among which the snap-off phenomenon has a significant impact on the trapping of aqueous and oily phases during oil- water displacements at the pore scale. The work is based on the design of a new oleophilic mesofluidic system as well as a strangulation system based on syringes. The tests conducted include imbibition, drainage, simultaneous oil/water displacement while visualizing the snap-off. Next, an attempt to inject steam was made in order to mobilize the trapped fluid phase. The results of the work show the trapping of water in small-diameter capillaries with an oil recovery rate between 47% and 71%, while the percentage of water produced is between 91% and 97%. The snap-off time is 3. 10^-4s. These results allow for a better understanding of the behavior of reservoir rocks at the microscopic scale