Iron control as part of a well treatment using time-released agents
AssigneeFlex-Chem Holding Company, LLC
InventorsAndrew Bryce CONWAY, Scott BAILEY
Life of this patent
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Abstract
In a well in a subterranean formation, treatment fluids for time-released iron control are utilized. These treatment fluids contain a time-released form of a complexing agent, wherein the complexing agent forms an insoluble complex with iron. The time-released form prevents loss of the agent prior to delivery to the desired site and at the desired time(s). Methods for controlling iron in a well in a subterranean formation utilize these treatment fluids containing a time-released form of a complexing agent and these methods create insoluble complexes of the agent with the iron to control the iron from the formation and/or well.
Claims22
1-25. (canceled)
A treatment fluid for time-released iron control in a well in a subterranean formation comprising water and a time-released form of a complexing agent, wherein the complexing agent is adsorbed to a matrix and is released from the matrix over time by diffusion and the agent forms an insoluble complex with iron.
A method for controlling iron in a well in a subterranean formation comprising:
- providing a treatment fluid comprising a time-released form of a complexing agent, wherein the complexing agent is adsorbed to a matrix or blended with a matrix such that the complexing agent is released from the matrix over time by diffusion;
- injecting the treatment fluid into the well of the formation until at least some of the treatment fluid contacts the formation and iron, wherein the iron includes iron originating from well equipment;
- and
- maintaining the treatment fluid in contact with iron within the formation, thereby allowing the agent to release and interact with iron to form an insoluble complex.
Dependencies are inferred from the claim text.