| abstract |
The flow of a fluid may be diverted from a high permeability zone to a low permeability portion of a subterranean formation by use of particulates comprising dicarboxylic acid, ester or an anhydride of the formula: n n n n n n n n n n or an anhydride thereof, wherein R 1 is —COO—(R 5 O)y—R 4 or —H; R 2 and R 3 are selected from the group consisting of —H and —COO—(R 5 O)y—R 4 , provided both R 2 and R 3 are —COO—(R 5 O)y—R 4 when R 1 is —H and further provided only one of R 2 or R 3 is —COO—(R 5 O)y—R 4 when R 1 is —COO—(R 5 O)y—R 4 , R 4 is —H or a C 1 -C 6 alkyl group, R 5 is a C 1 -C 6 alkylene group, and each y is 0 to 5 . The dicarboxylic acid, ester or anhydride may further be admixed with an aliphatic polyester having the general formula of repeating units: n n n n n n n n n n where n is an integer between 75 and 10,000 and R is selected from the group consisting of hydrogen, alkyl, aryl, alkylaryl, acetyl, heteroatoms, and mixtures; thereof. |