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US 11,447,683 B2Granted
Asphaltene solution for water shut off
AssigneeSaudi Arabian Oil Company
InventorAhmad Noor Al-Deen Hassan Rizq
Life of this patent
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Abstract
A method and a system for a water shut off material in a wellbore are provided. In an exemplary embodiment the water shutoff material includes a precipitate formed from a solution of asphaltene and an aqueous precipitant.
Claims12
A method for controlling unwanted water production in a water producing zone in a subterranean formation, comprising:
- flowing a solution of asphaltene into a wellbore such that it contacts the water producing zone;
- and
- flowing an aqueous solution into the wellbore such that it contacts the solution of asphaltene in the water producing zone to force precipitation of asphaltene, wherein the aqueous solution comprises a surfactant.
Dependencies are inferred from the claim text.