A study investigating the performance of low temperature wells following hydraulic fracturing is presented. Emphasis is placed on proper fracturing fluid and breaker selection to minimize proppant damage and maximize fracture conductivity. The study indicates borate crosslinked fluids yield minimal damage whereas organometallic crosslinked fluids consistantly yield severe damage. A detailed discussion of the impact of fluid-induced proppant damage on well performance is given.

Although previously reported laboratory work has addressed the topic of in-situ fracture conductivity, the results of conductivity damage in wells with low bottomhole static temperatures have not been reported. A detailed discussion of extensive laboratory conductivity testing at 100 ° F is presented to address the issue of conductivity impairment (damage) in low temperature wells. The conductivity and permeability of Jordan sand placed with several fluids incorporating various crosslinkers and breaker systems is reported. The data indicate crosslinked fracturing fluids can be used in low temperature wells to yield high fracture conductivity. However, the amount of damage observed is a function of both the crosslinker and breaker system.

Subsequent to laboratory testing, the impact of the fluid/breaker system on the performance of oil and gas wells was evaluated. Numerous fracture design and production simulations were performed to evaluate the effect of fluid systems on well performance. These data indicate production can increase 50% or more simply by incorporating a "cleaner" fracturing fluid system.

In conclusion, fracturing fluid and breaker selection are variables that must be considered when designing a fracture treatment in a low temperature well. This study indicates proppant placed with a borate crosslinked fracturing fluid containing a persulfate/amine breaker exhibits minimal conductivity impairment resulting in improved well performance.

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