Solid sandstone dissolver
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United States of America Patent
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Jun 2, 2009
Grant Date -
Jan 10, 2008
app pub date -
Sep 20, 2007
filing date -
Sep 15, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A dry solid composition is disclosed that, when added to an aqueous liquid, provides a slurry that can be used in sandstone acid fracturing. The slurry generates hydrofluoric acid downhole to etch the sandstone fracture faces created. The chemical and physical properties of the composition result in very uneven etching of the fracture faces, enhancing the fluid conductivity of the final fracture. Optionally, inert masking materials may be included in the dry composition, or added to the slurry, to increase the inhomogeneity of the etching and further increase the fluid conductivity.
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