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US 2004/0200619 A1Published application
Compositions containing a buffer and a peroxide or peracid useful for treating wells
AssigneeBJ Services Company
InventorsPhillip J. RAE, Gino F. DILULLO ARIAS
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Abstract
Compositions containing a peroxide or peracid and an organic acid salt buffer are disclosed. The compositions are useful for re-moving polymers from oil and gas wells, while simultaneously dissolving encountered calcium carbonate deposits.
Claims31
A method for improving the permeability of a well, the method comprising:
- selecting a well suspected of containing polymer deposits;
- and
- pumping a well treatment composition into the well, wherein the composition comprises water, a buffer, and hydrogen peroxide or a per-acid.
The method of claim 7, wherein the formate salt is sodium formate, potassium formate, or ammonium formate.
A method for improving the permeability of a well, the method comprising:
- selecting a well suspected of containing polymer deposits;
- and
- pumping a well treatment composition into the well, wherein the composition comprises water and hydrogen peroxide.
A well treatment composition comprising:
- water;
- a buffer;
- hydrogen peroxide or a per-acid.
Dependencies are inferred from the claim text.