HCID 131716490, compound → Zinc bromide

Participants

Reaction Steps

The rate of degradation of the HEC gel is controlled by (1) the amount of non-reducing sugar added to the fluid and (2) temperature. The gel can be broken in hours or days. To achieve a faster break time at a given temperature, the concentration of non-reducing sugar is simply increased. The data in Table I also show that the rate of breaking is affected by the type of heavy brine. CaCl2 brine at 11.6 ppg and CaCl2 /ZnBr2 brines at 13 and 16.2 ppg give comparable breaks. Whereas 15.1 ppg CaBr2 brine and 16.2 ppg ZnBr2 gave shorter break times. Generally, gels in ZnBr2 brine break faster than in CaBr2 brine, which break slightly faster than gels in CaCl2 brine.

Provenance & Evidence