Importance

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Abstract

A method of stimulating injection wells having a wellbore. The method includes the steps of placing a heater at or near the bottom of the well, adjacent to the area to be treated, energizing the heater to release heat energy, flowing a solvent past the heater to the area to be treated to contact solid wax deposits to mobilize the wax deposits, removing the mobilized wax and the solvent from the well area, and injecting waterflood water into the well and into the passageways that were previously blocked by the wax deposits. In one embodiment there is a further pretreatment step of selecting an appropriate thief zone blocker fluid and injecting the same into the well to selectively obstruct the thief zones. In a further embodiment there is a further pretreatment step of choosing an appropriate oil zone blocking fluid and injecting the same into the well prior to the injection of the thief zone blocking fluid to protect the same.

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First Claim