Abstract
Abstract In Daqing Oilfield, since 1988 1524 oil wells have been fractured by this technique. This is 21.4 percent of all fractured oil wells. The average oil production improvement of each well is 15.0 t/d, a 1.5 fold increase over conventionally fractured wells. The cumulative oil production improvement is 340.3 × 104 tons 203 water wells were fractured by TMFUD, 33 0 percent of all the fractured water injection wells The mean water injection improvement per day is 80.8 m3/d, and the cumulative water injection rate is increased by 146.6 × 104m3. The multifracture fracturing technique can be used to stimulate low permeability thin interlayers and as many as 6 to 9 independent sub-layers without moving the string.
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