METHODS AND VISCOSIFIED COMPOSITIONS FOR TREATING WELLS

摘要

The present invention relates to methods of treating subterranean formations with viscosified aqueous well treating compositions which break into thin fluids at static temperatures in the range of from about 150.degree.F to about 200.degree.F. A breaker system is included in the compositions comprised of an alkali metal or ammonium persulfate breaker and a breaker activity delaying agent comprised of an alkali metal chlorite or hypochlorite.