Patent ID: 6779607
Filing Date: 2004-08-24
Classification: C09K,E21B

Abstract:
A method of stimulating a downhole formation comprising:deploying a plurality of jet nozzles on a work string and locating the nozzle in a spaced relation to the wall of the formation to form an annulus between the nozzles and the formation, pumping gas into the workstring to build up the fluid pressure in the nozzles; discontinuing the step of pumping when the nozzles are fully charged; pumping a stimulation fluid down the annulus so that the stimulation fluid reacts with the formation, pumping additional afterflush fluid down the annulus to sweep the stimulation fluid out of the wellbore; and pumping additional gas into the workstring and through the openings so that the additional gas mixes with the afterflush fluid in the annulus to form a foam.