Process for preventing or remediating trithiazine deposition in high h2s wells
AssigneeM-I L.L.C.
InventorsRobert L. Horton, Randy Stoker, Paul Davis
Life of this patent
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Abstract
A method for treating a wellbore in a hydrogen sulfide-containing formation that includes injecting a first slug in the wellbore, the first slug comprising: at least one of primary amine and ammonia; and a base fluid; injecting a second slug in the wellbore, the second slug comprising: a triazine scavenger; and a base fluid; and allowing the triazine scavenger to react with the hydrogen sulfide is disclosed.
Claims22
A method for treating a wellbore in a hydrogen sulfide-containing formation, comprising:
- injecting a first slug in the wellbore, the first slug comprising:
- at least one of primary amine and ammonia;
- and
- a base fluid;
- injecting a second slug in the wellbore, the second slug comprising:
- a triazine scavenger;
- and
- a base fluid;
- and
- allowing the triazine scavenger to react with the hydrogen sulfide.
A method for treating a wellbore in a hydrogen sulfide-containing formation, comprising:
- injecting a slug in the wellbore, the slug comprising:
- a triazine scavenger;
- at least one of a primary amine and ammonia;
- and
- a base fluid;
- and
- allowing the triazine scavenger to react with the hydrogen sulfide.
A method of reducing hydrogen sulfide in a wellbore, comprising:
- injecting a first slug in the wellbore, the first slug comprising:
- a primary alkanolamine;
- a glycol;
- and
- a brine
- allowing at least a portion of the first slug to leak into the formation;
- injecting a second slug in the wellbore, the second slug comprising:
- a primary alkanolamine;
- a triazine scavenger;
- a glycol;
- and
- a brine;
- allowing the triazine scavenger to react with the hydrogen sulfide;
- and
- initiating flow of natural gas from the formation through the wellbore.
Dependencies are inferred from the claim text.