| 摘要 |
Gelled acidic compositions suitable for either matrix acidizing or fracture-acidizing of subterranean formations, and methods of using said compositions in acidizing operations, are provided. Said compositions comprise water, a water-dispersible polymer of acrylamide, an acid, and a flavotannin gelling agent. In a preferred embodiment, said compositions also comprise a gelation promoter, e.g., sodium dichromate or potassium dichromate.
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