Stimulation of injection wells with water-external micellar dispersions

Patent · Tue Oct 28 04:00:00 EST 1969

OSTI ID:6667404

Gogarty, W B; Jones, S C

Because of reservoir geometry, i.e., injection of water at an area immediately adjacent to the well bore, injection rates are reduced as a consequence of the residual oil saturation within this immediate area. This residual oil causes a lower value of permeability with respect to water flow than would exist if the reservoir surrounding the well bore were 100% saturated with water. Adversities of skin damage impede the injection of water--from an operational basis this is realized by a very large pressure differential across the skin. Injection rates can be greatly improved by reducing the residual oil saturation in the immediate area (up to 20 ft away from the well bore) of the well bore and overcoming the adversities of skin damage. Minislugs of water-external micellar dispersions are injected into injection wells to increase the injectivity index of the well. It is believed that the dispersion reduces the residual hydrocarbon saturation in the sand pores immediately adjacent the well bore and also overcomes adversities of skin damage. (10 claims)

• Assignee: EDB-83-013911
• Patent Number(s): US 3474865
• OSTI ID: 6667404
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
FLUID INJECTION
INJECTION WELLS
MICELLAR SYSTEMS
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
OIL SATURATION
OIL WELLS
SATURATION
STIMULATION
WATERFLOODING
WELL STIMULATION
WELLS