Acidizing method

Details Acidizing method Acidizing method

E - Fixed Constructions

21

B

31/13

E21B 43/27 (2006.01) C09K 8/74 (2006.01)

Patent

CA 1267276

ABSTRACT OF THE DISCLOSURE Subterranean formations are treated with acid, by a method comprising the steps of: (1) forming an acidizing composition by mixing an aqueous acid compo- nent with at least one water-soluble organosilicon compound; and (2) injecting the composition into the formation. Suitable organosilicon compounds include water-soluble organosilanes and organosilanes which hydrolyze to form water-soluble silanols. By using the organosilicon compound, movement of formation fine particles is inhibited and swelling of clays by aqueous fluids is reduced, thus tending to maintain formation permeability.

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