Systems and methods for applying a biocide using a precursor biocide
AssigneeSchlumberger Technology Corporation
InventorsPaul Barnes, James Fajt
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Abstract
A method for applying a biocide to a wellbore includes providing a precursor biocide to a location within a wellbore extending through an earth formation, the precursor biocide comprising an acetal or a hydroxyaldehyde, and reacting the precursor biocide in the wellbore or the earth formation in-situ to form a biocide comprising propenal. The method may further include treating the wellbore for effects of microorganisms using the biocide. Related methods and systems for applying the biocide to the wellbore are also disclosed.
Claims15
A method for applying a biocide to a wellbore, the method comprising:
- providing a precursor biocide to a location within the wellbore, the wellbore extending through an earth formation, the precursor biocide comprising at least one of acrolein diethyl acetal, acrolein ethylene glycol acetal, or 3-hydroxypropanal;
- and
- reacting the precursor biocide in the wellbore or the earth formation in-situ to form the biocide, the biocide comprising propenal.
A method of applying a biocide to a wellbore, the method comprising:
- providing a precursor biocide to a location within the wellbore, the wellbore extending through an earth formation, the precursor biocide comprising at least one of acrolein diethyl acetal, acrolein ethylene glycol acetal, or 3-hydroxypropanal;
- and
- responsive to exposure to an acid or water in the wellbore, forming the biocide in the wellbore from the precursor biocide, the biocide comprising propenal.
A system for providing a biocide to a wellbore, the system comprising:
- an injection pump in fluid communication with a precursor biocide, the precursor biocide comprising at least one of acrolein diethyl acetal, acrolein ethylene glycol acetal, or 3-hydroxypropanal;
- and
- wellbore piping in fluid communication with the injection pump and configured to provide the precursor biocide to a downhole location.
Dependencies are inferred from the claim text.