METHOD OF USING PHTHALIC AND TEREPHTHALIC ACIDS AND DERIVATIVES THEREOF IN WELL TREATMENT OPERATIONS

摘要

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 a diverter having the structural formula (I): wherein: R1 is -COO-(R5O)y-R4; R2 and R3 are selected from the group consisting of -H and -COO-(R5O)y-R4; provided that at least one of R2 or R3 is -COO-(R5O)y-R4 and further provided that both R2 or R3 are not -COO-(R5O)y-R4; R4 is -H or a C1-C6 alkyl group; R5 is a C1-C6 alkylene group; and each y is 0 to 5. Anhydrides of formula (I) are also acceptable as the diverter.