C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/28
C09K 8/72 (2006.01) E21B 43/22 (2006.01)
Patent
CA 1105692
Abstract of the Disclosure An acid composition comprising a substantially anhy- drous liquid mixture of (1) about 50 to 99 parts by weight of polyphosphoric acid having about 5 to 90 weight percent of the total P205 present as polymeric P205, and (2) about 1 to 25 parts by weight of hydrofluoric acid, and in which the H20/P205 mole ratio of the overall acid mixture is less than 3.4; and a method for increasing the permeability of siliceous subterranean formations in which the formation is treated with this composition. Also, the composition can optionally contain 0 to about 50 parts by weight of a catalyst such as a strong mineral acid, carboxylic acid, an oxidizing agent, or mixtures thereof.
301088
Maly George P.
Young Donald C.
Fetherstonhaugh & Co.
Union Oil Company Of California
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