Abstract
Re-fracturing is one of the main methods to increase single well production and stable production time for horizontal wells in tight reservoir. The optimization of re-fracturing method is very important for improving the development efficiency of horizontal wells after the treating of re-fracturing. Taking Chang 7 tight Reservoir in Ordos Basin as an example, a model for predicting the productivity of horizontal wells after re-fracturing is established by numerical simulation, and the effect of horizontal well development under different fracturing modes is studied. The results show that the best perforation method for Chang 7 tight oil reservoir is to increase the new perforation position and only fracturing the new perforation section according to the fracturing cost and stimulation effect.
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