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US 7,915,205 B2Granted
Single fluid acidizing treatment
AssigneeWeatherford Engineered Chemistry Canada Ltd.
InventorsClayton Smith, Darin Oswald, Dan Skibinski, Nicole Sylvestre
Life of this patent
Estimating the term…
Abstract
An acidizing formulation for use in the stimulation of hydrocarbon production is stable when packaged and stored as a single fluid for periods exceeding one year. The formulation contains a miscibility solvent which substantially prevents any phase separation between the constituents and lack of dispersion of the additives in the fluid.
Claims17
An acidizing formulation for the stimulation of hydrocarbon production comprising:
- an aqueous 15% hydrochloric acid solution being about 13.8% by weight of the formulation,
- a miscibility solvent being about 59% by volume of the formulation for forming a substantially stable single fluid, the miscibility solvent further comprising:
- about 15 wt % of an aromatic solvent:
- about 63 wt % of a blend of alcohols, the blend of alcohols being about 5 wt % to about 15 wt % long chain alcohols and about 40 wt % to about 60 wt % short chain alcohols;
- and
- about 19 wt % to about 24 wt % of a surfactant;
- a corrosion inhibitor being about 1.5 wt % of the formulation;
- a demulsifier being about 0.04 wt % of the formulation;
- an anti-sludge additive being about 0.4 wt % of the formulation;
- an iron control additive being about 1.5 wt % of the formulation;
- and
- the balance being water.
9 more elements
An acidizing formulation for the stimulation of hydrocarbon production comprising:
- an aqueous 28% hydrochloric acid solution being about 24.5% by weight of the formulation,
- a miscibility solvent being about 63.2% by volume of the formulation for forming a substantially stable single fluid, the miscibility solvent further comprising:
- about 15 wt % of an aromatic solvent:
- about 63 wt % of a blend of alcohols, the blend of alcohols being about 5 wt % to about 15 wt % long chain alcohols and about 40 wt % to about 60 wt % short chain alcohols;
- and
- about 19 wt % to about 24 wt % of a surfactant;
- a corrosion inhibitor being about 1.1 wt % of the formulation;
- a demulsifier being about 0.03 wt % of the formulation;
- an anti-sludge additive being about 0.4 wt % of the formulation;
- an iron control additive being about 1.3 wt % of the formulation;
- and
- the balance being water.
9 more elements
Dependencies are inferred from the claim text.