Estimates of the amount of fracturing fluid recovered as flow back in shale operations vary from as low as 25 percent to as high as 70 to 75 percent, and the rate at which the flow back exits the well can be more 100,000 gallons per day for the first few days.
Pagtatantya ng halaga ng fracturing fluid mababawi bilang daloy pabalik sa operations shale mag-iba mula sa bilang mababang bilang 25 porsiyento sa bilang mataas na bilang 70 sa 75 porsyento, at ang rate kung saan ang daloy pabalik labasan ang well ay maaaring maging mas 100,000 gallons bawat araw para sa unang ilang araw.