Method of preventing in-depth formation damage during injection of water into a formation
AssigneeChevron Research and Technology Company
InventorPatrick J. Shuler
Life of this patent
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Abstract
In-depth formation damage is prevented during water injection by adding to the water non-compressible solids of sufficient size and concentration to form an external filter cake within the injection well. Preferably, the non-compressible solids are either diatomite, perlite, saw dust, or calcium carbonate, and the concentration of non-compressible solids is from 0.001 to 5 wt%. When no longer needed, the external filter cake is removed from the injection well by using an acid wash or back-flowing the well.
Claims5
A method of preventing in-depth formation damage during injection of water into an injection well within a formation comprising adding to said water non-compressible solids of sufficient size and concentration to form a permeable external filter cake within the injection well.
Dependencies are inferred from the claim text.