Wellbore treatment for reducing wax deposits
AssigneeGlori Oil Limited
InventorsBhupendra Soni, Banwari Lal
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Abstract
A method of reducing wax deposition in an oil wellbore tubing includes providing an aqueous bioslurry comprising at least one microbe capable of degrading paraffin wax at about 20-45° C. and a nutrient medium containing one or more carbon source and an oxygen slow-releasing compound. The method further includes providing an oil wellbore completion having a production tubing with an interior surface including a zone that is susceptible to wax deposition when the well is operated to produce oil. The method further includes, while oil production from the well is stopped, incubating the biological slurry in the wax-deposition zone tubing for a sufficient time to multiply the microbe(s) and form a biofilm on at least the wax-susceptible zone.
Claims16
A method of reducing wax deposition in a wellbore tubing of an oil well, the method comprising:
- a) providing an aqueous biological slurry comprising at least one microbe capable of degrading paraffin wax at a temperature in the range of about 20-45° C., and a nutrient medium comprising at least one carbon source selected from the group consisting of glucose, sucrose and fructose, an oxygen slow-releasing compound selected from the group consisting of calcium peroxide or magnesium peroxide, and other components including minerals, organic solvents, vitamins, trace elements, an organic wax-solubilizing agent and water;
- b) providing an oil wellbore completion comprising a production tubing having an interior surface comprising a zone that is susceptible to paraffin wax deposition when the oil well is operated to produce oil;
- c) while oil production from the oil well is stopped, incubating said biological slurry in said zone for a period of time sufficient to multiply said at least one microbe and form a biofilm on at least said zone.
Dependencies are inferred from the claim text.