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Information Seminar Paper

Title

IMMISCIBLE FOAM FLOW FOR ENHANCING OIL RECOVERY IN SANDSTONE POROUS MEDIA

Writers

SIMJOO M. | ZITHA P.L.J.

Pages

 Start Page | End Page

Abstract

 FLOW OF NITROGEN FOAM STABILIZED BY C14-16 ALPHA OLEFIN SULFONATE (AOS) SURFACTANT IN NATURAL SANDSTONE POROUS MEDIA CONTAINING OIL WAS STUDIED EXPERIMENTALLY. THE AIM OF THE STUDY WAS TO INVESTIGATE WHETHER IMMISCIBLE FOAM FLOODING CAN IMPROVE OIL RECOVERY. FOAM WAS GENERATED INSITU BY CO-INJECTING GAS AND SURFACTANT SOLUTION IN A PREVIOUSLY WATER-FLOODED CORE. THE DISPLACEMENT PROCESS WAS VISUALIZED WITH THE AID OF A CT SCANNER. WE OBTAINED STABLE FOAM IN THE PRESENCE OF WATERFLOOD RESIDUAL OIL. SUBSTANTIAL REDUCTION IN FOAM MOBILITY AND CT IMAGES REVEALED THAT FOAMING OF GAS PROVIDES A GOOD MOBILITY CONTROL. THIS WAS ALSO REFLECTED BY A DELAY IN THE GAS BREAKTHROUGH TIME. INJECTION OF 4 PORE VOLUMES OF FOAM (EQUAL TO 0.36 PORE VOLUME OF SURFACTANT SOLUTION) RESULTED IN AN INCREMENTAL OIL RECOVERY AS MUCH AS 23±2% OF THE OIL INITIALLY IN PLACE.

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