| 摘要 |
A method and composition to dissolve siliceous material in a subterranean formation. The composition of the invention is an aqueous acidic solution having a pH no greater than 2 and comprised of at least one mineral acid and a fluoride compound of zirconium, chromium or cobalt. The method is carried out by contacting the siliceous material in the subterranean formation with the above identified composition.
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