In the last few years increasing emphasis has been placed on reducing post fracturing shutin times. This trend has caused renewed interest in the relationship between breaker loadings and static fluid temperatures. Models of cooling profiles during fracturing have been extensively discussed in the literature, but scant attention has been paid to post fracturing temperature recovery. The problem has been discussed in a general way and one model has been proposed. This paper presents a somewhat different model and presents its development. This paper will also discuss the application of this model to stimulation designs which require shortened breaking times. In addition, the relationship between fracture closure time and breaking times where crosslinked sand-laden gels are used will be brought out and the attendant danger of poor vertical proppant distribution will be discussed.

In the last few years increasing emphasis has been placed on reducing post fracturing shutin times. This trend has caused renewed interest in the relationship between breaker loadings and static fluid temperatures. Models of cooling profiles during fracturing have been extensively discussed in the literature, but scant attention has been paid to post fracturing temperature recovery. The problem has been discussed in a general way and one model has been proposed. This paper presents a somewhat different model and presents its development. This paper will also discuss the application of this model to stimulation designs which require shortened breaking times. In addition, the relationship between fracture closure time and breaking times where crosslinked sand-laden gels are used will be brought out and the attendant danger of poor vertical proppant distribution will be discussed.