Patent ID: 7770638
Filing Date: 2010-08-10
Classification: E21B

Abstract:
1. A method for stimulating production in cold heavy oil production with sand operations in an oil laden sand formation, the method including the following steps: introducing a gas impulse device into a wellbore up to a depth whereat oil laden sand is present in the formation adjacent to the wellbore; firing the gas impulse device periodically so that the device generates impulses of high pressure compressed gas and the pressure waves therefrom generate vibrations which dislodge the oil laden sand trapped in perforations of the wellbore and blockages of oil laden sand flow in the formation, improving flow of the oil laden sand into the wellbore; and pumping the oil laden sand that has flowed into the wellbore, thereafter to effect the separation of the oil from the sand, said step of pumping occurring while said step of firing is executed.