Patent ID: 7270179
Filing Date: 2007-09-18
Classification: C09K,E21B

Abstract:
1. A method of stimulating a flow of water into a well from water in strata surrounding the well, comprising the steps of gathering information about the history and physical characteristics of the well and surrounding aquifer; providing telemetry machinery to monitor internal conditions within the well; sealing the well in a manner such that pressurization of the well can be accomplished; introducing liquid and gaseous carbon dioxide (CO 2 ) into the well at a downhole pressure such that the liquid CO 2 solidifies within the well forming solid CO 2 ; manipulating and regulating the phase of CO 2 delivered into the sealed well according to information provided by the telemetry machinery; continuing introduction of the liquid and gaseous CO 2 into the well until a desired level of filling of the well with solid CO 2 is attained; allowing the sealed well containing solid CO 2 to stand for a time sufficient to sublime the solid CO 2 contained in the sealed well; releasing residual pressure in the sealed well; and releasing the seal from the well.