Patent ID: 8439115

Claim:
A scale inhibition squeeze treatment method for a hydrocarbon-containing formation, the method comprising: a. preparing a fluid comprising: i. a viscosifier; ii. a non-viscosifying scale inhibitor in an amount of from about 0.1% to about 20% by weight; and iii. a brine with a density of from about 8.3 lb/gal to about 16.0 lb/gal and a pH value from 5.0 to 8.5; b. injecting the fluid into a wellbore; and c. introducing the fluid into a formation, wherein the fluid is substantially free of acid for acid treatment purpose; wherein the fluid is introduced into a formation with permeability contrast between at least two zones; wherein the fluid pressure increases and the fluid penetrates a higher permeability zone and diverts the scale inhibitor, and wherein the scale inhibitor concentration increases in a zone of lower permeability.