Composition and method of reducing deposition of formate in underground formations
AssigneeCleansorb Limited
InventorRalph Edmund Harris
Life of this patent
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Abstract
A process is disclosed that includes providing a mixture to a wellbore. The mixture can comprise formic acid or a formic acid precursor, a salt of lactic acid, and a salt of gluconic acid. The mixture can be introduced into an underground formation around the wellbore. The mixture can prevent or at least reduce the formation of formate crystals as compared to mixtures without the salt of lactic acid or the salt of gluconic acid. The mixture permits the formic acid, or formic acid produced from hydrolysis of the formic acid precursor, to react with acid soluble material in the underground formation to generate soluble calcium salts.
Claims24
A process comprising:
- providing a treatment fluid used for acidizing to a wellbore, the treatment fluid comprising:
- formic acid or a formic acid precursor;
- a suitable salt of lactic acid;
- and
- a suitable salt of gluconic acid;
- introducing the treatment fluid into the underground formation;
- and
- allowing the formic acid, or formic acid produced from hydrolysis of the formic acid precursor, to react with acid soluble material in the underground formation to generate soluble calcium salts.
A process comprising:
- providing a mixture to a wellbore comprising:
- formic acid or a formic acid precursor;
- a salt of lactic acid;
- and
- a salt of gluconic acid
- introducing the mixture into the underground formation wherein the concentration of the salt of lactic acid and the salt of gluconic acid prevent or at least reduce the formation of formate crystals as compared to mixtures without the salt of lactic acid or the salt of gluconic acid;
- and
- allowing the formic acid, or formic acid produced from hydrolysis of the formic acid precursor, to react with acid soluble material in the underground formation to generate soluble calcium salts.
Dependencies are inferred from the claim text.