Dissolution of titanium-iron oxides and iron oxides in a wellbore
AssigneeHalliburton Energy Services, Inc.
InventorsDorianne Arlene Castillo, Sandeep Kumar Borra
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Abstract
Treatment fluids and methods for dissolving titanium-iron oxides and iron oxides in a wellbore. A treatment fluid includes an activator selected from the group consisting of chlorophyll, pheophytin, hydroxylammonium chloride, dopamine, crown ethers, cryptands, ethanoloamine, trihydroxamate-containing siderophores, salts thereof, and any combination thereof, an acid and/or acid-generating agent, and an aqueous base fluid. The treatment fluid contacts a titanium-iron oxide and/or iron oxide to dissolve the titanium-iron oxide and/or iron oxide.
Claims20
A method for dissolving titanium-iron oxides and/or iron oxides, the method comprises:
- providing a treatment fluid comprising:
- an activator selected from the group consisting of chlorophyll, pheophytin, hydroxylammonium chloride, dopamine, crown ethers, cryptands, ethanoloamine, trihydroxamate-containing siderophores, salts thereof, and any combination thereof,
- an acid and/or acid-generating agent, and
- an aqueous base fluid;
- and
- contacting a titanium-iron oxide and/or iron oxide with the treatment fluid;
- wherein the treatment fluid is introduced into a wellbore after a drilling fluid was circulated in the wellbore;
- wherein the drilling fluid introduced the titanium-iron oxide and/or iron oxide into the wellbore.
A system for dissolving titanium-iron oxides and/or iron oxides, the system comprises:
- a treatment fluid comprising:
- an activator selected from the group consisting of chlorophyll, pheophytin, hydroxylammonium chloride, dopamine, crown ethers, cryptands, ethanoloamine, trihydroxamate-containing siderophores, salts thereof, and any combination thereof,
- an acid and/or acid-generating agent, and
- an aqueous base fluid;
- mixing equipment configured to mix the activator, the acid and/or acid-generating agent, and the aqueous base fluid;
- pumping equipment configured to pump the treatment fluid in a wellbore to contact a titanium-iron oxide and/or iron oxide in the wellbore;
- a drilling fluid that introduced the titanium-iron oxide and/or iron oxide into the wellbore;
- wherein the treatment fluid is configured to be introduced into the wellbore after the drilling fluid was circulated in the wellbore.
Dependencies are inferred from the claim text.